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OALib Journal期刊
ISSN: 2333-9721
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一种单晶镍基合金蠕变期间γ'相的定向粗化机制
, PP. 591-596
Keywords: 单晶镍基合金,蠕变,定向粗化,扩散驱动力
Abstract:
对[001]取向单晶镍基合金恒载拉伸蠕变不同阶段的组织形貌进行了SEM，TEM观察和EDAX成分分析，研究了γ＇相定向粗化过程及机理结果表明蠕变初期，两相邻γ＇相呈侧平面对接方式，沿垂直于应力轴方向定向生长为类似筛网的核状组织，外加应力使γ＇／γ界面共格应变减少，应变能降低，释放的能量是促使合金元素定向扩散形成筏状γ＇结构的驱动力．
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