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OALib Journal期刊
ISSN: 2333-9721
费用：99美元
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定向凝固镍基高温合金DZ17G的循环蠕变行为
, PP. 942-947
Keywords: 定向凝固,镍基,高温合金,循环蠕变
Abstract:
本文研究了两种方式载荷循环（矩形波和锯齿波）对定向凝固镍基高温合金ＤＺ１７６Ｇ高温蠕变行为的影响.结果表明,与恒载荷静态蠕变相比,载荷循环并不影响蠕变塑性,但降低了蠕变寿命,蠕变寿命的降低程序近拟与载荷循环粢九成正比,且矩形载荷循环比锯齿波载荷循环效果更为明显.提出载荷循环导致蠕变寿命的降低与载荷变化引起的滞弹性效应无关,而是蠕变变形加速的结果.
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