Effect of Chemical Composition on the Ductile-to-Brittle Transition in Fe-Mn-C Ternary Alloy

摘要：

　　Hadfield steel has extremely high toughness and wear resistance at ambient temperature.However,this alloy exhibits low temperature embrittlement though it has a stable austenitic structure even in the high strain regime.In this study,ductile-to-brittle transition (DBT) behavior was compared between a typical Hadfield steel (13%Mn-0.9%C) and a modified steel (22%Mn-0.9%C).As a result,the 13Mn steel caused DBT and its Charpy absorbed energy was remarkably lowered at 77K and this embrittlement associated with intergranular fracture,while the 22Mn steel kept a high toughness and showed ductile fracture even at 77 K.TEM observations of tested specimens indicated that a stress concentration at grain boundary caused by deformation twinning leads to intergranular fracture in the 13Mn steel.On the other hand,the 22Mn steel never caused intergranular fracture even though it also formed deformation twins during impact deformation.

作者: TSUCHIYAMA Toshihiro ONO Yoshinori JIANG Fulin TAKAKI Setsuo

作者单位: Department of Materials Science and Engineering,Kyushu University, 744 Moto-oka, Nishi-ku, Fukuoka, National Institute for Materials Science(NIMS), 1-2-1 Sengen, Tsukuba, Ibaraki, Japan Department of Materials Science and Engineering, Kyushu University,744 Moto-oka, Nishi-ku, Fukuoka,

会议类型: 国际会议

会议名称: the 1st International Conference on Automobile Steel & The 3rd International Conference on High Manganese Steels (第一届国际汽车用钢大会暨第三届高锰钢国际会议)

会议地点: 成都

会议语种:英文

页码: 57-59

在线出版日期: 2016-11-16（万方平台首次上网日期，不代表论文的发表时间）