Purdue University

Purdue University

Mechanical Engineering
Tribology Laboratory

Yi Shen

Ph.D Student

B.S., Tsinghua University, Beijing, China, 2012

Office Address:
585 Purdue Mall

ME Room# G005
West Lafayette, IN 47907

Office Phone: 765-494-0308

Email: shen145@purdue.edu



The objective of this study is to discover the effect of retained austenite and residual stresses on rolling contact fatigue (RCF). AISI 8620 steels with different levels of retained austenite: 0%, 10%, 20%, 35%, are investigated both numerical and experimentally. A 2-D damage mechanics RCF model incorporating retained austenite and residual stresses has been developed based on results of torsion fatigue test. Corresponding RCF experiments are done on three-ball-on-rod test rig. The numerical and experimental results of fatigue life show a good corroboration. The fatigue spall evolution is also well predicted by the model. In addition, retained austenite transformation (to martensite) and residual stresses relaxation are modeled to give a comprehensive understanding on relationship between retained austenite, residual stresses and rolling contact fatigue.

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