Influence of pre-transformed martensite on work-hardening behavior of SUS 304 metastable austenitic stainless steel

  • Zong-yu XueEmail author
  • Sheng Zhou
  • Xi-cheng Wei


The metastable austenite was transformed to martensite by prestrain tension of SUS304 stainless steel to study the influence of transformed martensite on its subsequent work-hardening behavior under the uniaxial tensile condition. The X-ray diffractometer (XRD) was employed to detect the transformed martensite. Results showed that the volume fraction of transformed martensite increases with increasing prestrain. The pre-transformed martensite in the microstructure remarkably affects the deformation behavior of the steel, and the strength increases and the elongation decreases. The work-hardening curve of prestrained specimens observably changes with true strain. The work-hardening exponent n of stainless steel decreases with the increase of pre-transformed martensite. The achievement is a significant contribution to the process design during pressing.

Key words

prestrain SUS304 stainless steel martensite work-hardening behavior 


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Copyright information

© China Iron and Steel Research Institute Group 2010

Authors and Affiliations

  1. 1.School of Materials Science and EngineeringShanghai UniversityShanghaiChina

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