Jabbar Gattmah

University of Diyala · Department of Materials Engineering

Multilayered composite for dissimilar metals considers the most sought product because of their great importance in industrial applications. The roll bonding process (RBP) is a method used to fabricate metal composite strips that include two or more layers. On the other side, RBP is applied to refine the grain size of the metal structure. The hig...

In this current work, aluminum alloy grade 2024 is adopted as a plate material that is used in the rolling process with three different parameters including thickness reduction, forming temperature, and density of lubrication type. The experimental procedure of the rolling process is performed using the design of the experiment based on the Taguchi...

TThe sheet metal of two-layer composite (Al/Cu) is considered as one of the most important products used in different engineering applications. The roll bonding technique (RBT) is an active process to fabricate the metal composite due to the occurrence of high deformation that leads to layers bonding together. In this study, Al8112 and pure Cu were...

Induced residual stresses (IRS) within tube wall produced by a floating plug drawing (FPD) is one of the vital material defects in tube drawing. Therefore, the measurements of these stresses and their correlation with manufacturing parameters are quite important in the design of the drawing tools. In the present work, DIN 17,100 St 37–2 steel tubes...

Nickel super alloys like Inconel 718 characterize a significant metal part in the structures of aircraft and engine components. The high reliability levels are the major conditions during the manufacturing of these essential structural components in aerospace production. Surface integrity is the most important factor considered for estimating the q...

Cost effective machining of hybrid metal matrix composites (HMMC’s) with required surface integrity and without surface flaws is a challenging task for modern industries. This research explores the effect of end milling factors (spindle speed, feed rate, and depth of cut) and also weight percentage of reinforced materials on the surface integrity (...

3D explicit technique based on finite element analysis is usually applied for solving the nonlinear problems in metal forming process such as wire drawing. The mass scaling percentage that related with stable time increment has substantial influence for attaining the optimum simulation results. In this article, the drawing process of A304 stainless...

Abstract. Dissimilar arc stud welding is one of the most important tasks in manufacturing processes used to join the various metals with different dimensions. In the present work, AISI 304 austenitic stainless steel studs were joined to AISI 1008 low carbon steel base plate using an arc stud welding technique. The quality performance of the weld jo...

The residual stresses during the cold tube drawing process affect the quality of the final tube products significantly. In this study, a new development of measurement technique that is built on the removing layer method (RLM) is developed to measure the axial and the hoop residual stresses (ARS, HRS) inside the tube wall for AISI 1010 steel. The t...

Defects in bending processes are inevitable due to the plastic deformations created through the material pressing. Cost-effective and good quality of the V shaped die plate bending products can be produced by reducing the bending load, springback, and residual strains. In this article, a plate bending process is employed for Hy-80 steel and 304 sta...

Sheet metal forming process is one of the traditional manufacturing operations when the metal formed by a punch and die to convert a flat sheet of material into a part of the desired shape without fracture. In this present study, sheet metal forming based on V-bending die is selected to form the copper alloy, aluminum alloy, and steel alloy. Three-...

In this study, a commercially available finite element software ABAQUS/Explicit is used to simulate a cold rolling process for a rectangular cross-section. AA5049, AISI1015, and 304L stainless steel materials are considered in rectangular bar shape. Effects of process parameters on the rolling process are studied in detail. The finite element model...

Bu çalışmada, sonlu elemanlar analizi kullanılarak, sabit mandrel ile soğuk boru çekme işleminin benzetimi yapılmış olup, kesit daralma oranının, yarı kalıp açısının, yarı mandrel açısının ve sürtünme katsayılarının çekme gerilmesine etkileri araştırılmıştır. Sonlu elemenlar modeli, %16 kesit daralmasındaki deneysel verilerle doğrulanmıştır. Netice...

Cold tube drawing with a fixedstraight mandrel (fixed plug) is one of the majordrawing process in tube drawing operations.Although the process has high dimensionalaccuracy and good surface finish in general, theprocess parameters have significant effects onpart quality. Therefore, an accurate finiteelement model is extremely important toimprove par...

In this thesis, analysis of tube drawings with a fixed mandrel and residual stress measurements inside the tube wall are made. Dies and mandrels were designed and manufactured to produce AISI 1010 steel tubes at the reduction of areas of R=16% and 23%. Tube drawing was efficiently performed under lubricated conditions by a bench chain-driven cold d...

The control of hot extrusion process is a highly complicated task due to high deformation and high billet temperature during the process. A high-quality product can be produced by controlling the process temperature. In this present study, hot extrusion process of hollow tube is modeled by finite element method. Effects of process parameters, initi...

n this present paper, finite element method (FEM) is used to simulate cold tube drawing process with a fixed plug for AISI 1010 steel tube. The effects of semi die/plug angles on drawing stress for different friction coefficients at 23%reduction of area are studied. The finite element model is successfully validated with the experimental data. Resu...

In this study, the constraints and requirements for the analysis are determined during the cantilever beam model by using 7 different lenghts and 4 different profiles with 7 different loads. The materials used in this study are 61 types. The bending stresses on a cantilever beam model are calculated. The results of empirical model are compared with...

Large development that happens in computers technology leads to the use of modern programs and pollutant about different forming processes from through design and analysis for geometric forms by using Finite Element Method F.E.M, which gives accurate results which approaches experimental results. This study depends on local coordinates system by us...

To obtain good specification and high accurate in dimensions, for process of wires manufacture, must be the geometrical choosing of optimized for designing die and which can from through the obtaining high fleecy for wires. In this study was used technique of contact element for wire drawing by using finite element method for calculation of relativ...

To obtain good specification and high accurate in dimensions, for process of wires manufacture, must be the geometrical choosing of optimized for designing die and which can from through the obtaining high fleecy for wires. In this study was used technique of contact element for wire drawing by using finite element method for calculation of relativ...

The most important activity of metal forming technology is the correct design of stages geometry for economic consideration in order to increase the metals utilization coefficient and the productivity realized products with high dimensional accuracy and a finer quality of worked surface.In this Study the rotation of local coordinate by using finite...