期刊
出版社
ELSEVIER SCIENCE SA
DOI: 10.1016/j.msea.2016.10.083
关键词
Quenching and partitioning; Deformation induced martensitic transformation; Temperature; Strain rate; Dynamic tensile test; Transformation kinetics
类别
资金
- National Natural Science Foundation of China [U1360203]
- development fund for Shanghai talents [14Z11402001]
- University Research Program (URP) of Ford Motor Company
The quenching and partitioning steels have received much attention because of the material's high strength and good ductility, which results from deformation-induced martensitic transformation. To investigate the strain rate and temperature dependence of martensitic transformation and flow behavior, we conducted interrupted uniaxial tension tests and X-ray diffraction. The experiments covered a wide range of strain rate and six ambient temperatures conditions, which are in accordance with conditions encountered in sheet metal forming and car crash process. Based on the martensitic phase transformation behavior and newly proposed heat balance equation, a modified transformation kinetics law was proposed to describe both the thermal effect and positive effect of strain rate on deformation-induced martensitic transformation. The new model reproduces the martensitic phase transformation behavior of quenching and partitioning sheet steels for a wide range of strain rate and temperature conditions well.
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