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YANG Jianguo, CHEN Shuangjian, HUANG Nan, FANG Kun, YUAN Shijian, LIU Gang. Factors affecting deformation induced martensitic transformation of SUS304 stainless steel[J]. TRANSACTIONS OF THE CHINA WELDING INSTITUTION, 2012, (12): 89-92.
Citation: YANG Jianguo, CHEN Shuangjian, HUANG Nan, FANG Kun, YUAN Shijian, LIU Gang. Factors affecting deformation induced martensitic transformation of SUS304 stainless steel[J]. TRANSACTIONS OF THE CHINA WELDING INSTITUTION, 2012, (12): 89-92.
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Factors affecting deformation induced martensitic transformation of SUS304 stainless steel

  • 1.

    State Key Laboratory of Advanced Welding and Joining, Harbin Institute of Technology, Harbin 150001, China;Institute of Process Equipment and Control Engineering, Zhejiang University of Technology, Hangzhou 310032, China

  • 2.

    State Key Laboratory of Advanced Welding and Joining, Harbin Institute of Technology, Harbin 150001, China;Shanghai Institute of Applied Physics, Shanghai 201800, China

  • 3.

    State Key Laboratory of Advanced Welding and Joining, Harbin Institute of Technology, Harbin 150001, China

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  • Received Date: September 04, 2012
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  • Tensile tests of SUS304 stainless steel specimens were performed with different strain rates at different temperatures.Moreover, the martensite induced by deformation was analyzed by ferrite measuring instrument, optical microscopy and XRD.Experimental results show that the transformation of martensite is closely related to uniformity of microstructure, strain rate and temperature.At room temperature, the amount of martensite induced by deformation increases with the increasing of tensile strain.For the tailor-welded tube endured 30% circumference strain in hydroforming process at temperature, the amount of martensite is higher in fusion zone than that in HAZ, and it is fewer in the base metal, i.e., the higher the uniformity, the less the amount of martensite transformation induced by deformation from austenite.The amount of martensite decreases with the increasing of testing temperature.Tensile tests at 275℃ indicated that martensite transformation induced by deformation can be restrained in the process of plastic deformation at this temperature, the volume fraction of martensite is almost 0 under such conditions.
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