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Article

Effect of Grain Size on the Friction-Induced Martensitic Transformation and Tribological Properties of 304 Austenite Stainless Steel

by 1,2,*, 1,2,* and 1
1
Baoshan Iron & Steel Cooperation Limited, Shanghai 201900, China
2
School of Materials Science and Engineering, Shanghai Jiao Tong University, Shanghai 200240, China
*
Authors to whom correspondence should be addressed.
Metals 2020, 10(9), 1246; https://doi.org/10.3390/met10091246
Received: 13 August 2020 / Revised: 13 September 2020 / Accepted: 14 September 2020 / Published: 16 September 2020
(This article belongs to the Special Issue Friction and Wear of Metals)
Friction and wear performance of austenite stainless steels have been extensively studied and show a close relationship with the friction-induced martensitic transformation. However, how the grain size and associated friction-induced martensitic transformation behavior affect the tribological properties of austenite steels have not been systematically studied. In this work, dry sliding tests were performed on an AISI 304 stainless steel with a grain size ranging from 25 to 92 μm. The friction-induced surface morphology and microstructure evolution were characterized. Friction-induced martensitic transformation behavior, including martensite nucleation, martensite growth and martensite variant selection and its effect on the friction and wear behavior of the 304 stainless steel were analyzed. The results showed that both the surface coefficient of friction (COF) and the wear rate increase with the grain size. The COF was reduced three times and wear rate was reduced by 30% as the grain size decreased from 92 to 25 μm. A possible mechanism is proposed to account for the effect of grain size on the tribological behavior. It is discussed that austenite steel with refined grain size tends to suppress the amount of friction-induced martensitic transformed and significantly alleviates both the plowing and adhesive effect during dry sliding. View Full-Text
Keywords: austenite stainless steels; friction; wear; grain size; martensitic transformation austenite stainless steels; friction; wear; grain size; martensitic transformation
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MDPI and ACS Style

Mao, B.; Chu, S.; Wang, S. Effect of Grain Size on the Friction-Induced Martensitic Transformation and Tribological Properties of 304 Austenite Stainless Steel. Metals 2020, 10, 1246. https://doi.org/10.3390/met10091246

AMA Style

Mao B, Chu S, Wang S. Effect of Grain Size on the Friction-Induced Martensitic Transformation and Tribological Properties of 304 Austenite Stainless Steel. Metals. 2020; 10(9):1246. https://doi.org/10.3390/met10091246

Chicago/Turabian Style

Mao, Bo, Shuangjie Chu, and Shuyang Wang. 2020. "Effect of Grain Size on the Friction-Induced Martensitic Transformation and Tribological Properties of 304 Austenite Stainless Steel" Metals 10, no. 9: 1246. https://doi.org/10.3390/met10091246

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