对1J30升温和降温过程分析得出，深低温条件下1J30的马氏体转变为不可逆转变。同时，对1J30内马氏体衍射斑点分析得出：有许多平行的极薄的马氏体片生成；马氏体与奥氏体的位相关系符合“西山关系”。对软磁材料中的马氏体研究具有一定的意义。
It′s found that martensite transformation in 1J30 is irreversible by analyzing the heating and cooling process of 1J30. Through TEM analysis, the following conclusions were made: There had twins in martensite; the crystallographic orientation between martensite and austenite conformed to Nishiyama relationship; In diffraction photographs, there had highorder diffraction spots, proving the martensite films were very thin, which were very important for martensite research in soft magnetic materials.
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