Friction-Induced Martensitic Transformation and Wear Properties of Stainless Steel under Dry and Wet Conditions

Abstract

The wear characteristics of SUS304 and SUS316 stainless steels were evaluated at the rotation speeds of 100 m/s, 200 m/s, and 300 m/s under dry and wet conditions. The transition of friction-induced martensite occurred in wear-affected regions of two materials, regardless of the wear test conditions. The specific wear rates (Ws) of both stainless steels increase with increasing rotation speeds, regardless of the circumstances. Moreover, Ws of SUS304 and SUS316, obtained under dry conditions, is significantly higher than that of SUS304 and SUS316 obtained under wet conditions, respectively. This is because that the water film on the wet ring can act as a liquid lubricant between the ring and the block during the tests. After the wear tests, the hardness changes of both SUS304 and SUS316 are much higher under dry conditions, compared to those under wet conditions.

Bioactivity, Cytotoxicity, and Tribological Studies of Nickel-Free Austenitic Stainless Steel Obtained via Powder Metallurgy Route

“…Figure 9d shows the X-ray diffractogram of the HIP + HT material after tribological testing. It should be noted that after testing, martensite (α') is observed on the surface of the HIP + HT sample, probably due to the strain-induced martensitic transformation of austenitic stainless steels caused by excessive plastic deformation [29]. Interestingly, this transformation was not observed for the as-HIP sample.…”

“…Small changes in the friction coefficient of the HIP sample during the test may be caused by the contact instability when the indenter ploughed against the samples [29,30]. Qiao et al [14] reported that, for nickel-free stainless steel Fe-19Cr-15Mn-0.66N (in wt.…”