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Uniaxial TimeDependent Ratcheting of SS304 Stainless Steel at High Temperatures

KANG Guozheng , ZHANG Juan , SUN Yafang , KAN Qianhua

钢铁研究学报(英文版)

The uniaxial timedependent strain cyclic behaviors and ratcheting of SS304 stainless steel were studied at high temperatures (350 ℃ and 700 ℃). The effects of straining and stressing rates, holding time at the peak and/or valley of each cycle in addition to ambient temperature on the cyclic softening/hardening behavior and ratcheting of the material were discussed. It can be seen from experimental results that the material presents remarkable time dependence at 700 ℃, and the ratcheting strain depends greatly on the stressing rate, holding time and ambient temperature. Some significant conclusions are obtained, which are useful to build a constitutive model describing the timedependent cyclic deformation of the material.

关键词: SS304 stainless steel;time dependence;ratcheting;high temperature