Grain size effect on high-temperature fatigue properties of alloy718
Grain size effect on high-temperature fatigue properties of alloy718
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DOI：
10.1016/j.matlet.2004.09.029
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发表时间：
2005-02
影响因子：
3
通讯作者：
Kazuo Kobayashi;K. Yamaguchi;M. Hayakawa;M. Kimura
中科院分区：
文献类型：
--
作者：
Kazuo Kobayashi;K. Yamaguchi;M. Hayakawa;M. Kimura
研究了不同晶粒尺寸718合金的高温疲劳性能。对于粗晶合金，超过105次循环后，疲劳强度显著下降。疲劳断裂起源于奥氏体晶粒的小面。在高温高周疲劳区，刻面的存在导致疲劳强度的降低。
High-temperature fatigue properties of Alloy718 with different grain sizes were investigated. For the coarse-grain alloy, the fatigue strength notably decreased beyond 105cycles. The fatigue fracture had originated from facets of the austenite grains. The facets caused a decreasing of fatigue strengths in a high-cycle region at high temperatures.