In situ neutron diffraction analysis of microstructural evolution-dependent stress response in austenitic stainless steel under cyclic plastic deformation

オーステナイト系ステンレス鋼の繰返し塑性変形に伴う組織変化と応力応答のその場中性子回折法による解析

熊谷 正芳*; 黒田 雅利*; 松野 崇*; Harjo, S.   ; 秋田 貢一*

Kumagai, Masayoshi*; Kuroda, Masatoshi*; Matsuno, Takashi*; Harjo, S.; Akita, Koichi*

Microstructural evolution in austenitic stainless steels during cyclic plastic deformation has been studied via diffraction line profile analysis; however, their microstructure-dependent mechanical response upon stress partitioning in the matrix (austenite) and deformation-induced martensite has remained largely unexplored. In this study, the stress response analysis of austenitic stainless steel was performed using neutron diffraction, to evaluate the phase stresses in the austenite and martensite, and the relation with dislocation data was discussed.