期刊
JOURNAL OF IRON AND STEEL RESEARCH INTERNATIONAL
卷 17, 期 3, 页码 51-55出版社
SPRINGER
DOI: 10.1016/S1006-706X(10)60072-6
关键词
prestrain; SUS304 stainless steel; martensite; work-hardening behavior
资金
- National Natural Science Foundation of China [50675128, 50975166]
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.
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