The aim of the research was to investigate the effect of speed, load and reinforcement on abrasion behavior of Al/TiC composites by ball-cratering abrasion tester. Al/TiC composites were prepared by a stir casting method, with Al 6061 alloy matrix and TiC reinforcement varies from 5 to 20 wt.% with steps of 5 wt.%. A ball-cratering tester was used to determine the 3-body abrasive wear behavior under a different normal load and abrasive particle loading and wear duration. Al/10% TiC composites, Al/15% TiC and Al/20% TiC composites showed excellent abrasive resistance. The higher percentage TiC content avoids plasticity behavior in the composites, which is mainly responsible to severe wear at higher load due to near brittle cracking process. Wear mechanisms were investigated by scanning electron microscopy (SEM).
Purpose-The objective of this paper is to fabricate a coating of Ni-WS2-Al2O3 on SS304 substrate by fibre laser.
Design/Methodology/Approach- The SS304 samples were cladded at different laser cladding parameters. Effect of the coating parameters on the microstructure, surface morphology and chemical composition of the substrates were analysed by means of scanning electron microscope and electron dispersive x-ray spectroscopy. Variation in the friction and wear characteristics were studied by a pin-on- disc apparatus, in ambient air. Clad thickness was measured under optical microscope.
Findings-A good metallurgical bond existed between the substrate surface and the composite coating. Microhardness of the specimens metamorphosed to 380.6HV0.5 from 131.5HV0.5 which is approximately three times of the SS304 substrate due to the presence of hard Al2O3 particles. The wear and coefficient of friction values of the specimens reduced to almost 9 µm which is approximately 1/33 of the wear value of the parent material (306.7µm) for 180 seconds time duration which is attributed to variation in laser power and scan speed.
Originality/value-The paper is aimed at improving the hardness and tribological properties of SS304 by laser cladding techniques so as to reduce the wearing of gears and turbine blades made up of this material.
This is a sequential study of the research which has been done to find out the issues/concerns in SCM practices of Hero Moto Corp and GKN Driveline India limited (Saini, 2016). In the earlier, an effort was done to find out the affecting factors, now here in this study an effort is being carried out to analysis the all affecting variables and in the end to generalise the same so that these generalised results can be used in order to find out the same kind of obstacles which are being pulling back the various other automotive industries. In this paper, first Supply Chain Management (SCM) is defined and well presented, followed by the various factors which are being affecting the good SCM practices in Indian automotive scenario. In the end, a hand to hand comparison has been done in order to generalise some topped ranked issues. It is our best hope that these shortlisted concerns will help other automotive firms also to cope up their issues and challenges.
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