Design of alloy composition in 5%Mn-Cr-C austenitic steels

Hirokazu Tsukahara, Takuro Masumura, Toshihiro Tsuchiyama, Setsuo Takaki, Koichi Nakashima, Kazukuni Hase, Shigeru Endo

研究成果: ジャーナルへの寄稿学術誌査読

2 被引用数 (Scopus)


The range of chemical compositions that can obtain an austenitic single structure was defined for medium-manganese (Mn) carbon (C) steels. Among the potential compositions, Fe-5%Mn-4%Cr-(0.8-1.4)%C (mass%) was selected as the optimized composition range to form a stable austenitic structure. The tensile properties and deformation substructure were investigated in the austenitic steels having this composition. The work hardening behavior of the steels varied depending on the carbon content, which was closely related to the deformation microstructure. In the 0.8%C steel, both a deformation-induced martensitic phase as well as the formation of deformation twins generated a high work hardening until fracture. With an increasing carbon content, which increased the stacking fault energy (SFE), the deformation tended to shift towards dislocation slipping, resulting in a lower work hardening rate. This trend appears similar to conventional twinning-induced plasticity steel where the work hardening behavior is tied to the SFE.

ジャーナルisij international
出版ステータス出版済み - 2015

!!!All Science Journal Classification (ASJC) codes

  • 材料力学
  • 機械工学
  • 金属および合金
  • 材料化学


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