table 5 - uploaded by Mirza HYDER ALI Baig
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![Figure 1.1: Coconut palm leaf sheath Middle Fiber [1] In the present...](profile/Mirza-Baig-10/publication/264045489/figure/fig4/AS:668298161164295@1536346106901/Coconut-palm-leaf-sheath-Middle-Fiber-1-In-the-present-work-unsaturated-polyester_Q320.jpg)
The request for new and useful material is going on from times immemorial. The twentieth century has seen the evolution of many such materials Composite are the 21 st century material to meet the stringent demands of light weight, high strength, corrosion resistance near-net shapes and eco-friendly, In the year 1950, the concept of fiber-reinforced...
Citations
... Wear decreases with increase in temperature (Rajaram et al., 2010). Tribological behaviour of polymer composites has been studied (Rajesh et al., 2017). Sliding and slurry erosive wear resistance of fly ash reinforced AMC was investigated. ...
The aim of this study is to explore the sliding wear behaviour of aluminium alloy LM 25, Al/10 wt.% fly ash (FA) composite, AA/10 wt.% steel particles (SP) composites and AA/5wt.% FA/5 wt.% SP hybrid composites with respect to load, velocity and pin temperature conditions employing a pin on disc friction and wear machine. The wear characteristics such as coefficient of friction and wear loss are considered for the study. Results raveled that the wear loss of Al alloy and composites increases when the pin temperature was increased. Wear loss of Al/SP composite was lower than that of Al/FA composite. However Al/FA/SP hybrid composites exhibited superior wear resistance compared to Al alloy, Al/FA and Al/SP composites. It is obvious that the inclusion of the dual reinforcements such as FA and SP into the Al alloy increases the wear resistance as compared to single reinforced AMCs such as AL/FA and AL/SP composites.
... The results inferred that the feed rate and cutting speed minimize significantly both the height of the exit burrs and the surface roughness. Kundu et al [13][14] It is inferred from the literature study that the exit burr height of the drilled hole could be reduced by choosing the optimal cutting parameters and drill bit's geometry in relation to the materials to be drilled. This work intends to explore the effect of the material and cutting parameters on the exit burr. ...
In this work, the effect of heat treatment on the burr height is investigated with three different cutting speeds and feeds in drilling of Al alloy 7075. Al alloy was chosen in three different conditions such as As-cast condition, annealed condition and hardened condition. Three different feeds such as 30 m/min, 60 m/min, 90 m/min and three different cutting speeds such as 12.56 m/min, 37.68 m/min, 62.8 m/ min are chosen. Drilling tests are conducted as per the Taguchi's L9 orthogonal array. The experimental results are analyzed using Analysis of Variance (ANOVA) to study the influence of the factors on burr height.
Greater awareness regarding environmental issues, coupled with scarcity of resources, global
environmental problems, and increasingly strong environmental policies have influenced
industries and researchers to appreciate, study and develop new materials from renewable
resources and new manufacturing technologies. However, literature reports that interfacial
adhesion between natural fibers and polymeric matrix is a factor that affects the biocomposite
mechanical properties, able to be improved by several types of surface treatments. Thus,
coconut fiber mats were surface treated by atmospheric plasma jet, considered less aggressive
to the environment when compared to chemical treatments, in order to improve interfacial
adhesion with the polymer matrix to obtain biocomposites. Data from coconut fiber
characterization shown that the treatment modified the fibers surface and consequently their
hydrophilicity and surface energy, decreasing their permeability value. Processing parameters
and most appropriate curing cycle were determined and defined as 80 °C for 210 min, 135 °C
for 180 min and 160 °C for 120 min, without application of vacuum during the process and
approximately 40 % fiber volume fraction. Ultrasonic acoustic inspection allowed evaluating
the biocomposite plates processing by verifying possible imperfections caused by impregnation
of the coconut fiber by the resin and its homogeneity. Thermogravimetric analysis indicated
that the initial biocomposite degradation temperature is 175 °C. Glass transition temperature,
determined by DMA, is approximately 80 °C. Mechanical tests presented higher values of
tensile strength and flexural strength for the biocomposites reinforced with treated fibers when
compared to the biocomposites reinforced with untreated fibers. Higher values of tensile and
flexural modulus, as well as DMA loss and storage modulus for biocomposites reinforced with
treated fibers sustained better mechanical properties because of the plasma treatment. Fracture
morphology indicated better reinforcement-matrix adhesion for biocomposite reinforced with
treated fibers.
