Author(s): Anand Hegde , Adarsh Patil , Vijay Tambrallimath
Published in: International Journal of Engineering Research & Technology
License: This work is licensed under a Creative Commons Attribution 4.0 International License.
Volume/Issue: Vol. 3 - Issue 12 (December - 2014)
This study examines the corrosion behaviour of sintered powder metallurgy (P/M) austenitic stainless steel composites with carbide and oxide like TiC and Al2 O3 as reinforcements. The carbide and oxide were added in proportion of 4wt. % to 6wt. %. The powders were compacted into a disc of 20mm diameter and 2mm thick at 10 tonnes load. The compacts obtained were sintered in Nitrogen atmosphere at 1250˚c for 20 minutes. The sintered compacts were subjected to micro hardness, pin on disc wear testing and corrosion rate study by Tafel extrapolation method. The study revealed that the sintered specimens from TiC reinforced stainless steel powders have better micro hardness value than the other composite with Al2O3 and Y2O3 reinforced composite. Potentio dynamic polarization measurements indicated that addition of TiC in the matrix improves the corrosion resistance of sintered austenitic stainless steel in 3.5% NaCl
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