Ni-Fe奥氏体合金的氢脆及成分影响

金属学报, 1992, 28(6): 1-6.

Ni-Fe奥氏体合金的氢脆及成分影响

胡炜 , 王燕斌 , 褚武扬 , 肖纪美

北京科技大学材料物理系

北京(100083)北京科技大学材料物理系

北京科技大学材料物理系

基金项目: 国家自然科学基金资助项目

关键词： Ni-Fe合金 , hydrogen embrittlement , hydrogen induced delayed fracture

HYDROGEN EMBRITTLEMENT IN Ni-Fe FCC ALLOYS AND EFFECT OF COMPOSITION

HU Wei , WANG Yanbin , CHU Wuyang , XIAO Jimei University of Science and Technology Beijing Correspondent associate professor

Keywords： Ni-Fe alloy , 氢脆 , 氢致滞后断裂

研究了5种Ni-Fe奥氏体的氢致塑性损失和K_(IC)随成分的变化,发现当Fe含量为60％时,氢致塑性损失极小;Fe为50％时滞后断裂门槛值K_(IH)极小,根据不稳定氢化物含量,固溶氢含量以及位错结构随合金成分的变化解释氢致塑性损失和 K_(IH)随成分的变化规律。

The ductility loss in 60Ni40Fe alloy and the threshold stress intensity, K_(lH),in 50Ni50Fe alloy during dynamic charging have a minimum value. The variations ofamounts of hydride phase and hydrogen evolution and dislocation structure with compositionhave been investigated. The difference between variation of hydrogen embrittlement suscepti-bility measured by ductility loss with composition and that by K_(lH) or K_(lH)/ Kc could be ex-plained by use of synthetical effects of amount of hydride and solutionizing hydrogen and ex-tent of dislocation planarity on hydrogen embrittlement suceptibility.

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