Influence of Warm Deformation on Strain-Induced Martensite Behavior of 316L Stainless Steel

Abstract:

In order to control the ratio of nano/ultrafine structure grains of warm/cold rolled 316L stainless steel after annealing, the influence of deformation amount and temperature on martensite content and microstructure was investigated, and a model of the content of stain-induced martensite and deformation amount and temperature was established. Results showed that the content of stain-induced martensite was nonlinear with deformation amount, but with an incubation period. And it’s generally exponential. Martensitic transition occurred in large deformation stage. 58.23% strain-induced martensite was formed when deformation amount was 80% at 200°C. The content of martensite is the most significant factor that affects austenite grain size after annealing. With more strain-induced martensite, the average austenite grain size decreased, and the uniformity of grain size was improved, which was generally monotonous.

• Periodical: Materials Science Forum (Volume 913)
• Pages: 254-263
• DOI: https://doi.org/10.4028/www.scientific.net/MSF.913.254
• Online since: February 2018
• Authors: Da Zhang, Hui Bin Wu*, Gang Niu, Di Tang, Na Gong
• Keywords: Deformation Mechanism, Reverse Transformation Austenite, Strain-Induced Martensite

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