Enhanced surface hardening of AISI D2 steel by atomic attrition during ion nitriding

Wear resistance of the pressure armor submitted to deep cryogenic treatment and plasma nitriding

“…The product of the N saturation process is the precipitation of nitrides, the redistribution of carbon and grain boundary changes [22]. Generally, nitrided samples present greater hardness in the region near the surface, region of the compound layer and diffusion zone, and a decay to a hardness similar to the material not affected by the nitriding treatment (AR) [7,10,[23][24][25]. However, it was observed that the nitrided samples had a microhardness value smaller than the values found in the AR material, at a depth of approximately 400 lm.…”

Process parameter optimization based on principal components analysis during machining of hardened steel

“…During hard turning of AISI D2 steel using coated carbide insert, the surface roughness analysis was carried out by Srithar et al (2014). An experimental study was conducted by Cho et al (2014) in-order to investigate the surface hardness enhancement of AISI D2 steel by ion nitriding through atomic attrition. Hullapa et al (2013) explored the use of Magnetic Barkhausen Noise (MBN) to monitor the transformation of austenite to martensite during cooling to sub-zero temperatures.…”

Synergetic effect of thicker nanocrystalline structure with high amount of strain induced martensite on surface characteristics of plasma nitrided austenitic stainless steel

“…Shot peening with lower shot velocity (typically 1 to 20 m/s) and longer shot peening duration (typically few minutes to few hours) seems to effectively fabricate nanocrystalline layer with minimum surface roughness. Among such treatments, surface mechanical attrition treatments (SMAT) have been successfully applied to fabricate a nanostructured layer on the surface of different engineering materials [10][11][12][13][14][15]. A new reactor is developed which combines advantages of air blast shot peening and methods like SMAT.…”