Investigation on the polymer-like deformation behavior in ultra-fine grained metastable austenitic steel

2022学年的研究活动和研究成果如下：(1)在日本JPARC的BL19-TAKUMI对UFG 304不锈钢进行了拉伸变形中子原位衍射实验。用中子衍射技术定量地评价了形变诱发马氏体相变速率和巨大Luders带扩展过程中奥氏体基与马氏体间的相应力分配。(2)将上述结果总结成一篇提交给《Scripta Materialia》杂志的短论文，目前正在审阅中。(3)在2022年5月29-6月1日在日本筑波举行的第七届国际先进钢会议(ICAS)上作了口头发言。

Research activities and research achievements in the academic year 2022 are as follows:(1)Tensile deformation with in-situ neutron diffraction experiments were performed on the UFG 304 stainless steel at BL19-TAKUMI, JPARC, Japan. The transformation rate of deformation induced martensite and the phase stress partitioning between austenite matrix and martensite during the propagation of the huge Luders band were quantitatively evaluated by the neutron diffraction technique.(2)Above results were summarized into a short paper submitted to the journal Scripta Materialia and now it is under review.(3)An oral presentation was given in the international conference “The 7th International Conference on Advanced Steels (ICAS)” held on May 29 - June 1, 2022 Tsukuba, Japan.