Heinz-Günter Brokmeier

Technische Universität Clausthal | TUC · IWW-TEXMAT

The handling of larger samples for texture studies is limited when we using the Eulerian cradle. The robot Stäubli RX160 installed at STRESS-SPEC offers much more freedom in sample manipulation on one hand to perform pole figure scanning and on the other hand to position the sample for a texture mapping. A key problem is that slit systems cannot be...

The crystallographic textures and magnetic properties of Fe–2.6 wt% Si after two different cold rolling and thermal treatment processes were investigated. The first set of samples was 90% cold rolled and annealed for 20 min at 600 °C, 700 °C, 900 °C and 1100 °C, while the second set was cold rolled for 75% and 60% with intermediate annealing at 600...

A special device for tensile and compressive loading installed on a neutron texture diffractometer has been developed. The wide range of suitable sample dimensions and loading parameters are described. This new device now allows the influence of applied forces on the texture to be investigated by neutron texture measurement. Results achieved under...

High energy X-rays are well known due to there high penetration power particular in materials testing devices. For diffraction experiments high energy X-rays with more than 50 keV can be obtained at storage rings or using a tungsten X-ray tube. According to the high penetration power, these beamlines offer a very high photon flux and an excellent b...

A multi-scale investigation was carried out on pure silver subjected to equal channel angular pressing up to 3 passes. Microstructure and texture were examined using scanning and transmission electron microscopy as well as diffraction of neutron and high-energy synchrotron radiation. The evolution of the deformation substructure in the material is...

Pearlitic steel wires subjected to severe cold drawing deformation exhibit a unique combination of high strength and excellent ductility, making them suitable for critical applications such as hanging bridge cables, crane cables and tire cord. Torsion tests up to rupture are commonly used in the industry for quality control purposes. A flat fractur...

The Nb-V-Ti-N-C system microelements coupling precipitation behavior in high strength naval steel was thermodynamically analyzed. The effects of micron/nano particles on the microstructure, mechanical properties, and corrosion resistance were also studied by an in situ scanning electron microscopy (SEM) tensile test, transmission electron microscop...

The evolution of micro-strain and crystallographic texture of each phase of α+β Ti-6Al-4V titanium alloy generated during tensile deformation has been estimated numerically and then compared with the experimental results. It has been carried out based on the Crystal Plasticity Finite Element Model (CPFEM) simulation of the stress-strain curve till...

This investigation proposes a pathway for generating optimum microstructure for a medium Mn containing twinning-induced plasticity/transformation-induced plasticity (TWIP/TRIP) steels. The steel contains a two-phase microstructure consisting of austenite and ferrite phase arranged in a lamellar fashion. The microstructure was developed following a...

CoCuFeMnNi complex concentrated alloy was subjected to hot compression at different temperatures and strain rates. Texture evolution for four representative samples was studied using electron backscatter diffraction, neutron diffraction and viscoplastic self-consistent simulations. EBSD revealed highest low angle grain boundaries and high angle gra...

The compressive deformation behavior of the as-cast and as-extruded Mg92Y5Ni3 (at.%) alloy mostly composed of long period stacking ordered (LPSO) phase was studied by in-situ synchrotron radiation combined with the analysis of deformation traces after compression at different applied stress. The as-cast alloy has random texture, while the as-extrud...

Debye–Scherrer patterns, obtained from X-ray diffraction experiments using synchrotron light in transmission geometry, were analysed to construct generalized pole figures, and further used as input for an orientation distribution function inversion algorithm. By using Langford’s method for separating strain and size contributions to peak broadening...

The purpose of the present study is to track the formation of the intermetallic phases that form in the binary Al-Mg system and investigate their orientation relationships to the parent Al and Mg elements. Therefore, two compositions Al60Mg40 and Al40Mg60 (wt.%), which are very suitable for studying the diffusion of Al in Mg and Mg in Al were heate...

In-situ deformation of Ni rich NiTi shape memory alloy is characterized using synchrotron diffraction. The changes in the texture of austenite and martensite phases as a function of applied stress are systematically investigated. Development of large elastic stresses with a concomitant plastic deformation have been found to restrict the stress indu...

The effect of temperature (350 °C < MS < 450 °C) on the partitioning mechanisms and the final microstructure evolution in a CMnSiAl quenching and partitioning (Q&P) steel was investigated. The microstructure of both the Q&P specimens, comprised of distorted BCC or pseudo tetragonal martensite structure with two different characteristics namely (i)...

Stress‐induced intermartensitic phase transformation from 10 m to 14 m modulated martensite structure is characterized in Ni50.5−Mn28.9−Ga20.6 at% single crystals, with particular focus on periodic atomic shuffling by in situ synchrotron radiation diffraction. Under compression, along the [001] direction, at 6 MPa, the self‐accommodated 10 m single...

Anisotropic behavior is a key characteristic for understanding eccentricity in tubes. In this paper, the effect of using a tilted die during tube drawing on eccentricity, texture, dislocation density, and mechanical properties is shown. Copper tubes were drawn with a +/- 5 degrees tilted die for two passes. The increase or decrease in eccentricity...

The interplay of microstructural mechanisms controlling the deformation-induced martensitic phase transformations and the texture formation in all phases of a metastable austenitic Cr-Mn-Ni steel was investigated using in situ synchrotron radiation diffraction under uniaxial compression and ex situ electron backscatter diffraction. With increasing...

The content of strain-induced martensite in austempered ductile iron has been quantitatively determined using three different kinds of neutron methods: (1) high-resolution powder diffraction with subsequent standard Rietveld refinement, (2) phase quantification using pole figure measurements and (3) Bragg edge neutron transmission. The accuracy and...

Texture modification during sheet rolling appears differently in binary Mg-RE (rare-earth) or MgCa alloy, compared to their ternary counterparts containing Zn. The differences in texture development and the active deformation mechanisms under tensile loading were investigated in the binary alloys. These analyses are based on in-situ synchrotron exp...

A low carbon steel was processed by Cold Rolling (CR) and Asymmetrical Rolling (ASR) at room temperature until 200 μm thickness reduction using multiple rolling passes of 25 μm. ASR process induced a soft curvature with a 45.7 mm length and 128.8 mm radius, while the CR process did not show any curvature. Materials showed differences in the strain...

In this study, the mechanical properties and damping capacities of cast Mg-5.5Zn-0.6Zr (weight percent, ZK60) alloys have been simultaneously improved by a facile multi-directional forging (MDF) processing, and the mechanisms of microstructure evolution and texture modification are systematically investigated. The activation of tension twinning occ...

In the Al–Mg system, intermetallic compounds can be formed by a solid-state reaction between the elemental components. Metal matrix composites obtained by classical powder metallurgy and room temperature extrusion with the two compositions Al60–Mg40 and Al40–Mg60 (wt. %) were studied. The high fraction of Al–Mg grain boundaries in these materials a...

One of the most important parameters making the production of precision tubes a challenging process, is the inhomogeneity of mass flow in the pre-stage of processing leading to eccentricity, heterogeneity of residual stresses and crystallographic texture. This paper presents a multiscale modeling framework linking four disparate length scales for s...

Equal channel angular pressing was carried out on Al–Mg alloys to study the effect of Mg addition on the microstructure, texture and strength after severe plastic deformation by 8 passes of equal channel angular pressing (ECAP) through route Bc. The increase in Mg content enhanced the propensity of continuous dynamic recrystallization and simultane...

Green Al powder compacts of commercial purity with random orientation were subjected to single pass friction stir processing (FSP) with different tool rotational and traverse speeds. The evolution of crystallographic texture obtained from large area electron back scattered diffraction were compared with the bulk texture of the nugget zone character...

In this study, high energy synchrotron radiation was used to perform an in-situ diffraction experiment in medium Mn Fe-6Mn-0.5C-1Al alloy to study the elemental partitioning and consequent austenite phase evolution at different stages, namely, during heating, holding and cooling. It has been observed that the austenite phase fraction significantly...

The present study aims to understand the evolution of textural and microstructural heterogeneity and its effect on evolution of mechanical properties of an equiatomic FCC CoCuFeMnNi high entropy alloy (HEA) disc subjected to high pressure torsion (HPT). HPT was performed on disc specimen with a hydrostatic pressure of 5 GPa for 0.1, 0.5, 1 and 5 tu...

To explore the effect of neodymium (Nd) on the deformation mechanisms of Mg–Zn alloys, texture and lattice strain developments of hot-rolled Mg–Zn (Z1) and Mg–Zn–Nd (ZN10) alloys were investigated using in situ synchrotron diffraction and compared with elasto-viscoplastic self-consistent simulation under tensile loading. The Nd-containing ZN10 allo...

The austenitic stainless steel X5CrNiMo17-12-2 in thickness ranging from 0.2 mm to 1.0 mm was examined in regard to the mechanical properties and microstructure. The aim was to investigate the suitability of conventional test methods for thin material down to 0.2 mm. Within these investigations, all used thicknesses were characterized by convention...

Corrigendum to “Influence of Nd or Ca addition on the dislocation activity and texture changes of Mg–Zn alloy sheets under uniaxial tensile loading” [Mater. Sci. Eng.: A 761 (22 July 2019) 138053]

In situ hard X-ray diffraction experiments were carried out to investigate the dislocation slip activity of Mg-1 wt.% Zn-based alloys containing Nd or Ca during tensile loading. Diffraction patterns collected during tensile loading at 3 temperatures were analyzed using a convolutional multiple whole profile fitting procedure. High activation of non...

In the present investigation, the effect of crystallographic texture on deformation and failure mechanism of austenitic stainless steel 316 (SS 316) during monotonic tension and stress control cyclic (also known as fatigue) deformation has been correlated with the statistical aspect of microstructural defects structure and deformation microstructur...

High precision dimensionality tubes are required for a number of applications. Nevertheless, there are some troubles and challenges to produce high quality tubes in a cost-effective way. In recent works done at the Institute of Metallurgy at Clausthal University of Technology, the tube drawing process was optimized by introducing dynamic tilting an...

In this work, the tension-compression asymmetry of an extruded Mg-8.4wt.%Gd-2.3wt.%Y-0.2wt.%Zr alloy with a bimodal microstructure, consisting of fine DRXed grains and coarse unDRXed grains, was investigated by in-situ synchrotron diffraction testing and microstructure analysis. It is found that the as-extruded alloy exhibits good tension-compressi...

A discontinuous yielding was observed in the as-extruded Mg-7Gd-2Y-1Zn-0.6Zr (wt. %) alloy under uniaxial tension along the extrusion direction, which was eliminated by the peak-aging treatment. The deformation mechanisms of the as-extruded and peak-aged alloys were studied by in-situ synchrotron diffraction measurement and elastic-viscoplastic sel...

By applying cold extrusion, an elemental metal powder composite Al60Mg40 was prepared. The texture gradient was measured over the cross-section of the extrusion profile using synchrotron radiation while the bulk texture was obtained by neutron diffraction. The aluminum phase shows a typical texture component of plane-strain deformation in the middl...

The texture weakening is an effective way to improve the mechanical properties and the formability of wrought Mg alloys. The addition of rare earth elements (RE) into Mg alloys leads to a texture weakening during thermomechanical processes with a less distinct alignment of basal planes parallel to the main deformation axis. Understanding the role o...

The texture weakening is an effective way to improve the mechanical properties and the formability of wrought Mg alloys. The addition of rare earth elements (RE) into Mg alloys leads to a texture weakening during thermomechanical processes with a less distinct alignment of basal planes parallel to the main deformation axis. Understanding the role o...

The most ductile rare earth intermetallic compound, YAg, was subjected to an thermal activation analysis at low temperatures down to 4 K. Evaluation of the activation parameters and their dependence on stress and temperature yields strong indication for forest dislocation cutting as the rate-controlling deformation mechanism, similar to face-center...

In recent works done at Institute of Metallurgy at the Clausthal University of Technology, it has been shown that it is possible to control the wall-thickness variations in tubes (so-called eccentricity) and residual stresses with introducing tilting to the die in tube drawing (i.e. the die is tilted from its central line). Moreover, the evolution...

Metallic tubes usually show heterogeneities along circumference and through wall thickness. Local texture analysis by synchrotron diffraction and global texture analysis by neutron diffraction was used describing texture variations related to the wall thickness. Test sample was an SF-Cu tube with outer diameter of 140 mm and an average wall thickne...

Evolutions of texture and lattice strain of swaged brass samples were investigated by neutron diffraction at STRESS-SPEC under tensile deformation using a unique tension/compression rig. The two phased sample BS1 (61% α-brass and 39% β-brass) became 100% α-brass after 400 °C annealing (sample BS2). The starting texture of the as-received material B...

The high flux neutron diffractometer STRESS-SPEC at FRM II, Garching Germany, offers a flexible instrument setup suitable for fast and surface residual strain measurements. Likewise bulk, local or gradient texture analyses are feasible. Here improvements of the hardware (detector, slits) of the instrument as well as developments on methods for resi...

The present work compares two deformation techniques, rolling and Equal Channel Angular pressing (ECAP), and the response offered by three different materials that differ in Stacking Fault Energy (SFE): AA1010 Al, commercially pure Cu, and an austenitic stainless steel. The objective of this investigation is to study the effect of each deformation...

Due to the high quality and statistics utilizing neutron diffraction for texture analyses, the crystallographic texture variation of six Mg-alloys is described in detail (AM20–AZ31–AZ61–AZ91–ZC71–WE43). More or less in all cases, the crystallographic texture is composed of some ideal texture components such as {0001} <10–10> and {10–10} <11–20> and...

Severe Plastic Deformation (SPD) techniques are widely used nowadays because of the mechanical properties improvements caused by grain refinement and development of dislocation arrays. Diffraction techniques can be used to assess the changes registered in the microstructure through these methods. Two sets of samples of F138 austenitic stainless ste...

In order to reduce tubes’ dimensions, improve their surface finish and obtain re-quested mechanical properties, tube drawing is one of the effective and flexible methods. However, many parameters influence the results obtained - positively or negatively – such as tool geometry, friction, drawing force, the amount of thickness reduction, etc. Many i...

The influence of cryorolling (CR), room temperature rolling (RTR) and post annealing on precipitation, microstructural evolution (recovery, recrystallisation and grain growth), mechanical and corrosion behavior, was investigated in the present work. The precipitation kinetics and microstructural morphology of CR, RTR, and post annealed samples were...

Mg and its alloy have large potential in weight reduction usages because of their low density. However, the relatively low strength and modulus hinder their widely applications. Accumulative roll bonding (ARB) is one kind of severe plastic deformation (SPD) process which can produce bulk ultrafine-grained (UFG) metallic materials. In order to impro...

The microstructural characteristics of deformation-processed materials highly influence their mechanical properties. For a complete characterization of a microstructure both local and global information must be gathered, which requires the combination of different analysis techniques. X-ray and Electron Backscatter Diffraction were used in the pres...

In the last decades, there have been significant advances in texture measurement techniques and analyzing software. This chapter introduces various texture measuring techniques, from laboratory machines to large facilities. By comparing the characteristics of each method, a guideline to a more effective use for different research purposes is provid...

Crystallographic texture is one of the key parameter of a polycrystalline material, which is able to describe firstly the history of a material during manufacturing as well as during the lifetime of a finished product. Secondly is the crystallographic texture the key for the anisotropy of a polycrystalline material. Texture type and texture sharpne...

In the present work, the effect of grain boundary misorientation, deformation temperature and AlFeMnSi-phase on fatigue behavior of 6082 Al has been investigated. The 6082 Al alloy has been subjected to cryorolling followed by warm rolling at 100 °C–250 °C. The fatigue test of the processed alloy has been performed at stress ratio (R) of zero with...

Rotary friction welding (RFW) was used in the current study to join the dissimilar metals AA7020-T6 aluminium alloy and 316L steel. Neutron diffraction was performed to investigate the texture gradient around the weld line and to map the residual stress over the whole specimen. The texture analysis showed a weak shear component near the bond line o...

Nano-SiCp/AZ91 magnesium matrix composite was fabricated by stir casting. The as-cast ingots were extruded at 350 °C, then processed by equal channel angular pressing (ECAP) at various temperatures (250 °C, 300 °C and 350 °C). Grains are significantly refined after the extrusion and the ECAP. A basal fibre texture was detected by neutron diffractio...

The Beamline for European Materials Engineering Research (BEER) will be built at the European Spallation Source (ESS). The diffractometer utilizes the high brilliance of the long-pulse neutron source and offers high instrument flexibility. It includes a novel chopper technique that extracts several short pulses out of the long pulse, leading to sub...

Preferred grain orientations (crystallographic texture) of base materials could influence on mechanical properties, microstructure and residual stresses of welded joints. This should be considered for design purposes, in particular for materials having non-cubic crystal structures. A multitude of experiments have been carried out in this field of s...

Twin-roll casting of magnesium alloys is seen as a promising processing route to enable a further development of sheet properties. In this regard the influence of melt temperature and rolling speed on the microstructure and texture development of magnesium strips is investigated for alloy AZ31. Microstructure and through-thickness texture measureme...

The dislocation density evolution along the loading axis of a textured AA 7020-T6 aluminum alloy during uniaxial tension was investigated by in-situ synchrotron diffraction. The highly parallel synchrotron beam at the High Energy Materials Science beamline P07 in PETRA III, DESY, offers excellent conditions to separate different influences for line...

The materials science neutron diffractometer STRESS-SPEC located at FRM II is a dedicated instrument for strain and pole figure measurements. Both methods make complementary demands on sample handling. On one hand pole figure measurements need a high degree of freedom to orient small samples and on the other hand in strain investigations it is ofte...

In the present study, recovery, recrystallisation, grain growth, mechanical, and corrosion resistance of 6082 Al alloy subjected to cryorolling (CR) and annealing (AN) treatment were investigated. CR was performed to produce ultrafine grained structure and subsequently, AN treatment was given to investigate its influence on recovery, recrystallisat...

The mechanical and corrosion behavior of Al alloy 6082-T6 subjected to solution heat treating condition at temperatures varying from400 to 600 C and soaking times of 3–24 h have been investigated. Solution heat treating at 550 C for 24 h led to the dissolution of the Mg2Si and AlSi6Mg3Fe precipitates into the matrix, and the Al12(FeMn)3Si2 phase tr...

In the present investigation, the ageing behavior of ultrafine grained (UFG) Al 6061 alloy, processed through multi-directional forging (MDF) at cryogenic temperature was investigated. The evolution of microstructure was investigated through transmission electron microscopy and electron back scattered diffraction technique. The results indicate tha...

The texture-induced anisotropic mechanical behavior of a highly textured AA 7020-T6 (maximum orientation density of 29.7 multiple random distribution), was characterized by the lattice strain evolution along rolling direction (RD), 45° to RD and 90° to RD, respectively, under uniaxial tension using high energy X-ray diffraction. The uniaxial tensil...

Abstract The microstructure developed during severe plastic deformation results in improved mechanical properties because of the decrease in domain sizes and accumulation of defects, mainly dislocation arrays. The characteristic deformation stages observed in low stacking fault energy (SFE) face centered cubic (FCC) materials are highly influenced...

The effect of magnetic annealing on crystallographic texture, microstructure, defects density and magnetic properties of a Fe-2.6% Si steel has been analyzed. After two stage cold rolling (75% and 60% cold rolled) with intermediate annealing process at (600 °C/1 h) the sample annealed at 600 °C for one hour during which different magnetic field of...

Firstly, an Al7020 block was characterized by the texture gradient, which was remarkably strong. Texture sharpness in the center with about 30 mrd (multiple random distribution) shows typical plain strain texture components. On the surface and close to the surface the texture sharpness is much weaker showing also shear components. Strongest shear w...

The material science diffractometer STRESS-SPEC has high flux and a high flexible monochromator arrangement to optimize the needed wavelength. Many specific sample handling stages and sample environments are available. One of them is a Staubli RX 160 robot with nominal load capacity of 20 kg and more freedom for texture mapping than the Huber 512 E...

Materials characterization includes a long list of information's which are on one hand important for process optimizations and on the other hand key knowledge for application, lifetime and failure predictions. With the help of area detector investigations one is able to get simultaneously all information related to line position, line intensity and...

Tube drawing is an inhomogeneous process with anisotropic flow. Quantitative texture analysis was used to get inside in eccentricity and ovality of a Cu-tube drawn without a plug. To obtain the texture gradient over the wall thickness high resolution synchrotron radiation was used. One obtains on one hand different textures at the surfaces than in...

The crystal structure of modulated martensite in Mn-rich off-stoichiometric Ni2Mn1.44In0.56 alloy was determined with high-resolution powder neutron diffraction and synchrotron X-ray diffraction in the frame of (3 + 1)-dimensional superspace theory. The average crystal structure and the modulation wave vector were firstly derived by analyzing the r...

Twin-roll casting of magnesium alloys is seen as a promising processing route to enable a further development of sheet properties. In this regard the influence of melt temperature and rolling speed on the microstructure and texture development of magnesium strips is investigated for alloy AZ31. Microstructure and through-thickness texture measureme...

Am Materialforschungsdiffraktometer STRESS-SPEC der Forschungs-Neutronen-quelle Heinz Maier-Leibnitz (FRM II) wurde vor einiger Zeit ein BMBF gefördertes Robotersystem in Betrieb genommen. Damit wurde es erstmals möglich kompakte Proben von technischen Dimensionen bezüglich kristallographischer Textur, Rest-spannungen und Phasenzusammensetzungen au...

In general the texture is weak; from inside to outside texture sharpness decreases ● The center of the twist extruded sample shows an overlap of two (110) fiber texture components having a slide twist from each other (typical compression texture-fcc) ● Top shows an overlap of surface friction and back pressure ● Bottom shows an unknown texture beh...

Microstructures and tensile properties of commercial pure magnesium processed by rotary swaging (RS) technique were investigated. Bulk and gradient textures in the RS processed Mg were characterised by neutron and synchrotron diffractions, respectively. Grains of the pure Mg were gradually refined with increase in the RS passes, which largely contr...

Microstructural characterization by combined EBSD and X-ray diffraction analysis is shown for an FCC material deformed by rolling and further heat treatment on air. The wide variety of x-rays sources combined with EBSD allows some correlations between microstructural parameters to be withdrawn by carefully analyzing x-ray peak broadening. The combi...

Rods of grade 2 Ti were processed by Equal-Channel Angular Pressing (ECAP) ( = 120° at 573 K) employing 2, 4 and 6 passes. The same billets were further deformed by High- Pressure Torsion (HPT) at room temperature, varying both the hydrostatic pressure (1 and 6 GPa) and the number of rotations (n = 1 and 5). The ECAP and HPT samples were studied by...

The onset of Severe Plastic Deformation (SPD) regime is quite instructive on the possible origins of the nano-microstructures developed in metals and alloys. It is known that grain fragmentation and dislocation accumulation, among other defects, proceed at different paces depending fundamentally on grain orientations and active deformation mechanis...

Twinning is an alternative mechanism to achieve ultra-fine grain structures through severe plastic deformation. The properties induced in a plastically deformed material are highly dependent on the degree of deformation, accumulated deformation energy and details on grain sizes and microstructure, which are on the scale of some tens of nanometers;...

Cold rolling (CR) leads to a heavy changes in the crystallographic texture and microstructure, especially crystal defects, such as dislocations, and stacking faults increase. The microstructure evolution in commercially pure titanium (cp-Ti) deformed by CR at the room temperature was determined by using the synchrotron peak profile analysis of full...

Cold rolling (CR) leads to a heavy changes in the crystallographic texture and microstructure, especially crystal defects, such as dislocations, and stacking faults increase. The microstructure evolution in commercially pure titanium (cp-Ti) deformed by CR at the room temperature was determined by using the synchrotron peak profile analysis of full...

75%Al-25%Nb powder composites, fabricated by square shape cold extrusion, were subject to shot peening treatment with full coverage. Shot peening results in a high number of intense local deformations, with a surface roughness in our case of about l6gm. Due to the high local deformation down to nano-scale surface grain refinement and strain accumul...

This article reports on the development of the rotational friction welding process for the welding of γ-TiAl- casting alloy Ti-47Al-3.5(Mn+Cr+Nb)-0. 8(B+Si) to Ti6Al4V base metal and on the characterisation of the mechanical and microstructural properties of dissimilar metal friction welding. Pre- and post welding heat treatment is necessary in ord...

The friction welded joint #16TABTi64 and #19TABTi64 two round tensile test specimens were machined which were free of localized cracking in the outer region. At process temperatures the globular and fine grained microstructure of the Titanium alloy Ti6AI4V supports the occurrence of super-plasticity and deformation within the 3 phase region. This l...

The effect of rolling and annealing on the crystallographic texture and the magnetic properties of Fe-2.6% Si non-oriented electric steel during 90% cold rolling and different annealing temperature at (600 °C, 700 °C, 900 °C and 1100 °C) for 60 min and 20 min was analyzed. The 97% hot rolled as received material shows development of alpha and gamma...

Residual stress evaluation is an important stage to interpret the fatigue behavior of many engineering materials. The present research aimed at evaluating non-destructively the macroscopic compressive and balancing tensile residual stresses generated in the surface layer and in the core region, respectively, in mechanically surface treated alpha ti...

Residual stress determination in engineering components from diffraction strain measurements needs reliable diffraction elastic constants (DECs). From this sense, in situ uniaxial tensile loading experiment was performed on alpha titanium alloy Ti–2.5Cu at the HEMS beamline at DESY by means of a monochromatic synchrotron X-ray diffraction. A compar...