OALib Journal期刊
ISSN: 2333-9721
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一种镍基合金的蠕变和低周疲劳的交互作用
, PP. 518-592
Abstract:
对一种镍基高温合金作了应力控制的蠕变-低周疲劳的复合试验。结果指出,缺口试样复合试验的寿命并不都满足线性累积损伤规律,即蠕变与低周疲劳间有时发生交互作用。交互作用的强弱与蠕变延性有关。在蠕变延性极小值的试验温度(650℃),交互作用最强。改变热处理制度提高蠕变延性后,在同样温度下不再发生交互作用。光滑试样在650℃没有观察到交互作用。根据断口特征和蠕变延性,分析和讨论了产生蠕变-疲劳交互作用的原因。
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