Large-strain cyclic response and martensitic transformation of austenitic stainless steel at elevated temperatures

10th International Conference and Workshop on Numerical Simulation of 3D Sheet Metal Forming Processes

Hamasaki, H.^1 ; Nakano, T.^1 ; Ishimaru, E.^2 ; Yoshida, F.^1

Deparmtment of Mechanical Science and Engineering, Hiroshima University, 1-4-1, Kagamiyama, Higashi-Hiroshima, Hiroshima

739-8527, Japan^1

Nippon Steel and Sumikin Stainless Steel Corporation, 3434, Ooaza-shimada, Hikari, Yamaguchi

743-8550, Japan^2

关键词: Bauschinger effects;    Cyclic response;    Elevated temperature;    Equivalent stress;    Homogenized stress;    Martensite phasis;    Martensite volume fraction;    Stress reversal;   

Others  :  https://iopscience.iop.org/article/10.1088/1742-6596/734/3/032023/pdf
DOI  :  10.1088/1742-6596/734/3/032023

来源: IOP

【 摘 要 】

Cyclic tension-compression tests were carried out for austenitic stainless steel (SUS304) at elevated temperatures. The significant Bauschinger effect was found in the obtained stress-strain curve. In addition, stagnation of deformation induced martensitic transformation was observed just after stress reversal until the equivalent stress reached the maximum value in the course of experiment. The constitutive model for SUS304 at room temperature was developed, in which homogenized stress of SUS304 was expressed by the weighed summation of stresses of austenite and martensite phases. The calculated stress-strain curves and predicted martensite volume fraction were well correlated with those experimental results.