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断裂力学在蠕变裂纹扩展中的应用

, PP. 19-24

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Abstract:

本文简要介绍研究蠕变裂纹扩展的现状以及两种铁镍基高温合金蠕变裂纹扩展试验的初步结果。试验表明两种合金在600℃,300小时内存在一个不致产生蠕变开裂的应力强度因子门坎值KJcct试验过程中,试样加载点裂纹张开位移和直流电位随时间的变化以及宏观断口的观察均证实了上述结果。

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