崔仁杰,黄朝晖,管凯,秦健朝,张毅鹏,赵子晗

• 1:北京航空材料研究院先进高温结构材料国防科技重点实验室

摘要(Abstract)：

研究了第二代镍基单晶高温合金DD5在870～980℃时效150～2000 h后γ′相的粗化动力学。结果表明:长期时效后DD5合金γ′相的形貌和尺寸取决于时效温度和时效时间,可用形貌稳定因子来表征;在870～980℃时效温度下,枝晶中γ′析出相发生粗化,γ′析出相的平均尺寸随时效时间和温度的增加而增大;动力学计算结果表明DD5合金在长期时效后,γ′相的粗化长大受合金元素扩散的控制,γ′析出相依然保持规则立方状,具有较好的组织稳定性。

关键词(KeyWords)： DD5单晶高温合金;γ′相;动力学;长期时效

Abstract:

Keywords:

基金项目(Foundation):

作者(Author): 崔仁杰,黄朝晖,管凯,秦健朝,张毅鹏,赵子晗

DOI: 10.13289/j.issn.1009-6264.2020-0006

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