International Journal of Material Science
[5 followers] Follow
Open Access journal
ISSN (Print) 2226-4531 - ISSN (Online) 2226-4523
Published by Science and Engineering Publishing Company [49 journals]
- Simulation of Organic Solar Cell at Different Active Layer Thickness
Abstract: Simulation of Organic Solar Cell at Different Active Layer Thickness
Author Narender SinghAshish ChaudharyNikhil Rastog
The J-V characteristics of organic hetero junction solar cell of different active layer thicknesses have been simulated by AMPS-1D software. A composite of P3HT: PCBM is used as photo active layer material, sandwiched between a transparent ITO electrode and Al back side contact. The simulation results clearly demonstrated that the dark J-V characteristics and electric field across the junction of hetero junction solar cell are affected by the active layer thickness.
- A Unified Model of Crack Propagation in Scratched and Unscratched Samples
of Al 2024-T3 Clad
Abstract: A Unified Model of Crack Propagation in Scratched and Unscratched Samples of Al 2024-T3 Clad
Author Nader A. Nade
An experimental study of the effect of scratches on the fatigue life and fatigue crack growth of Al 2024-T3 clad material has been conducted. The result showed that Al 2024-T3 clad material is a scratch sensitive material. It presented a significant drop in fatigue life, 95% with a scratch depth of 100 µm in comparison with the unscratched material. Also, it has been found that cracks propagate faster in scratched samples than unscratched and at a lower stress intensity factor. A model that predicts the fatigue crack propagation of scratched samples is proposed. Furthermore, scanning electron micrographs showed microcracks, generated by the presence of scratches, responsible in decreasing the fatigue life of the material.
- Effect of 8-13WT%Mn on the Microstructural Characterization of Fe-Mn-C
Abstract: Effect of 8-13WT%Mn on the Microstructural Characterization of Fe-Mn-C Steel
Author Arnab SarkarTapas Bandyopadhya
Mn based steels have shown promise for automotive application but however very limited research was conducted in medium Mn range that is aimed at enhancing the mechanical properties through microstructural control. Till now, it has been reported that both high and low Mn steel are undesirable for automotive application. Thus two different steel composition characterized as Fe-0.62C-13.64Mn-4.24Al-2.29Si, (S-1) and Fe-0.54C-8.36Mn-5.24Al-1.72Si, (S-2) produced by melting-casting route, have further been mechanically worked and heat-treated to obtain the desired microstructure. Microstructural analysis reveals austenite as the major phase along with martensite after quenching and tempering heat treatment. The steel containing higher Mn with low stacking fault energy results in hexagonally closed packed є-martensite formation where as the steel containing lower Mn with relatively higher stacking fault energy results in body centered tetragonal α-martensite formation.
- Mechanical and Three-Body Abrasive Wear Behaviour of Cenosphere Filled
Abstract: Mechanical and Three-Body Abrasive Wear Behaviour of Cenosphere Filled Epoxy Composites
Author Suresha BheemappaChandrashekar ASrinivas
Novel epoxy composites made from major industrial waste, fly ash cenosphere (FA-ceno) particles have been developed. The effect of FA-ceno loadings on mechanical and three-body abrasive wear behaviour has been investigated. The tribological behaviour of three-body abrasive wear tests with different loads/abrading distances were performed at room temperature by using a Rubber wheel abrasion apparatus. Experimental results showed that the tensile strength and Young’s modulus of FA-ceno filled epoxy are more than those of neat epoxy. The wear volume increased with increasing abrading distance and the specific wear rate decreased with increasing abrading distance/ load which depends on filler loading. Among the filled composites tested, 10 wt% silane treated with FA-ceno filled epoxy showed a promising trend. Finally, the scanning electron microscopic observation on the wear mechanisms of epoxy and their composites were discussed.
- Robust design on equal channel angle extrusion of Ti-6Al-4V using Taguchi
Abstract: Robust design on equal channel angle extrusion of Ti-6Al-4V using Taguchi method
Author Dyi-Cheng Che
Utilizing commercial DEFORMTM rigid-plastic finite element analysis software, this study implements a series of simulations to investigate the plastic deformation behavior of Ti-6Al-4V titanium alloy during equal channel angle (ECA) extrusion. The simulations focus specifically on the effects of the effective stress-strain distribution, and the die load at the exit. The relative influences of the internal angle between the two die channels, the friction factors, the titanium alloy temperature and the strain rate of billet are systematically examined. Finally, the Taguchi method is used to optimize the ECA process parameters. The numerical analysis provide valuable insights into the shear plastic deformation behavior of Ti-6Al-4V titanium alloy during the robust design methodology in optimizing the ECA extrusion processing.