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金属学报  2006 

湿空气中恒磁场导致(Tb,Dy)Fe2合金的滞后开裂

, PP. 369-373

Keywords: (Tb,Dy)Fe2,畴变,恒磁场,滞后开裂

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Abstract:

对(Tb,Dy)Fe2超磁致伸缩合金,用微分相衬显微镜原位研究了应力和磁场引起的畴变,卸载压痕裂纹在湿空气中的滞后扩展以及在湿空气中恒磁场引起的滞后畴变及滞后开裂。结果表明,残余应力能使压痕裂纹在湿空气中发生滞后扩展;当磁场大于门槛值Hth后就能使压痕裂纹发生瞬时扩展;在湿空气中恒磁场(H

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