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Influence of carbon concentration and magnetic transition on the austenite lattice parameter of 30Mn-C steel

30Mn-C鋼のオーステナイト格子パラメータに及ぼす炭素濃度と磁気転移の影響

友田 陽*; 村上 俊夫*; Wang, Y. X.*; 大村 孝仁*; Harjo, S.; Su, Y.; 篠原 武尚

Tomota, Yo*; Murakami, Toshio*; Wang, Y. X.*; Omura, Takahito*; Harjo, S.; Su, Y.; Shinohara, Takenao

In this study, the effects of carbon concentration and magnetic transition on the austenite lattice parameter of Fe-30Mn-$$x$$C alloys were assessed. A linear relationship was obtained between the carbon content and the lattice parameter determined by neutron diffraction and neutron Bragg-edge transmission imaging for austenitic steels bearing 0.007-1.20 mass% C. The results obtained through both methods showed good agreement. In addition, carbon partitioning was evaluated in artificially piled-up discs with different carbon contents in order to develop a new technique for advanced multi-phase steels. The analysis of asymmetry and broadening of the diffraction line profile revealed that the carbon partitioning could be determined. In conclusion, the results presented herein expand the current knowledge on the properties of high Mn austenite.

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パーセンタイル:100

分野:Materials Science, Multidisciplinary

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