Low-temperature mechanical and magnetic properties of the reduced activation martensitic steel  

作　　者：Hui-Li DING Tao ZHANG Rui GAO Xian-Pincl WANG Qian-Feng FANG Chang-Song LIU Jin-Ping SUO 

机构地区：[1]Key Laboratory of Materials Physics, Institute of Solid State Physics, Chinese Academy of Sciences, Hefei 230031, China [2]School of Materials Science and Engineering, Huazhong University of Science and Technology, Wuhan 430074, China

出　　处：《Frontiers of Materials Science》2015年第3期264-271,共8页材料学前沿（英文版）

摘　　要：Mechanical and magnetic properties as well as their relationship in the reduced activation martensitic （RAM） steel were investigated in the temperature range from -90℃ to 20℃. Charpy impact tests show that the ductile-to-brittle transition temperature （DBTT） of the RAM steel is about -60℃. Low-temperature tensile tests show that the yield strength, ultimate tensile strength and total elongation values increase as temperature decreases, indicating that the strength and plasticity below the DBTT are higher than those above the DBTT. The coercive field （Hc） in the scale of logarithm decreases linearly with the increasing temperature and the absolute value of the slope of InHc versus temperature above the DBTT is obviously larger than that below the DBTT, also confirmed in the T91 steel. The results indicate that the non-destructive magnetic measurement is a promising candidate method for the DBTT detection of ferromagnetic steels.Mechanical and magnetic properties as well as their relationship in the reduced activation martensitic （RAM） steel were investigated in the temperature range from -90℃ to 20℃. Charpy impact tests show that the ductile-to-brittle transition temperature （DBTT） of the RAM steel is about -60℃. Low-temperature tensile tests show that the yield strength, ultimate tensile strength and total elongation values increase as temperature decreases, indicating that the strength and plasticity below the DBTT are higher than those above the DBTT. The coercive field （Hc） in the scale of logarithm decreases linearly with the increasing temperature and the absolute value of the slope of InHc versus temperature above the DBTT is obviously larger than that below the DBTT, also confirmed in the T91 steel. The results indicate that the non-destructive magnetic measurement is a promising candidate method for the DBTT detection of ferromagnetic steels.

关 键 词：reduced activation martensitic （RAM） steel ductile-to-brittle transition temperature （DBTT） mechanical property magnetic property non-destructive detection 

分 类 号：TG142.24[一般工业技术—材料科学与工程] V512[金属学及工艺—金属材料]