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Effects of magnetic fields on martensitic transformation and serration of austenitic FeNi and FeCrNi steels at 4 K

Y. Kurita, S. Emura, K. Fujita, K. Nagai, K. Shibata1993年Fusion Engineering and DesignIF 1.7出版社

AbstractEffects of magnetic fields up to 8 T on martensitic transformation and serration (discontinuous yielding) at 4 K have been investigated in Fe-37.4wt.%Ni alloy, Type 304L and Type 316LN stainless steels together with effects of applied elastic stress and plastic deformation of the transformation. Isothermal transformation was enhanced with increases in applied stress and magnetic fields. The amount of α′ martensite induced by plastic deformation in Type 304L and 316LN steels was increased by an 8 T magnetic field, and the increase was getting large with plastic strain. The amount of deformation-induced α′ martensite increased by the magnetic field was small in Fe-37.4wt.%Ni alloys. The applied magnetic field also suppressed the onset of serration in Type 304L and 316LN steels.

日本語訳

8Tまでの磁場がFe-37.4wt.%Ni合金、Type 304LおよびType 316LNステンレス鋼におけるマルテンサイト変態と4Kでのセレーション(不連続降伏)に及ぼす影響を、弾性応力および塑性変形の影響とともに調査した。等温変態は応力と磁場の増加に伴い促進された。Type 304Lおよび316LN鋼における塑性変形誘起α′マルテンサイト量は8Tの磁場によって増加し、その増加量は塑性ひずみの増大に伴って大きくなった。Fe-37.4wt.%Ni合金における磁場による変形誘起α′マルテンサイト量の増加は小さかった。また、印加磁場はType 304Lおよび316LN鋼におけるセレーションの発生を抑制した。

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