Transactions of Materials and Heat Treatment

Title：Effect of initial strain rate on superplasticity of 00Cr22Ni5Mo3N duplex stainless steel

Authors： LI Shao-feng REN Xue-ping LI Shu-xia XIA Ting-hui

Unit： University of Science and Technology Beijing Shanxi Limin Industry Limited Liability Company Institute of Modern Control Technology

KeyWords： duplex stainless steel super-plasticity initial strain rate m-value

ClassificationCode：TG331

year,vol(issue):pagenumber：2013,38(5):158-161

Abstract：

After solution treatment and cold rolling deformation of 00Cr22Ni5Mo3N, super plastic deformation was tested with different initial strain rates for 5 min insulation under 950 ℃. Effect of initial strain rate on the super-plasticity of 00Cr22Ni5Mo3N duplex stainless steel was researched. The m-value was calculated and the microstructure after the tensile test was observed,and the variation of m-value and microstructure along with the initial strain rate was studied. The results show that when the initial strain rate is low, the microstructure becomes coarsely, on the contrary, the microstructure becomes fine. When the initial strain rate increases, variations of elongation and the m-value show the same tendency which increase first and then decrease. When the initial strain rate is 1.5×10-3 s-1, the elongation and the m-value achieve the maximum value of 1070% and 0.65 respectively.

Funds：

李少峰（1966-），男，博士研究生

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