崔彤,王继杰,王磊,杨洪才,赵光普

• 1:东北大学材料与冶金学院
• 2:沈阳航空工业学院材料工程系
• 3:东北大学材料与冶金学院
• 4:东北大学材料与冶金学院

摘要(Abstract)：

研究一种新型镍基合金在750、800、850℃长期时效(500-2000h)过程中的组织变化及其对750℃/510MPa持久性能的影响。用扫描电子显微镜对合金显微组织及持久断口进行观察。结果表明:在750-800℃时效该合金有针状TCP相(拓扑密排相)析出,随其析出量的增加,合金基体的强度降低,合金持久断裂趋于从沿晶断裂转为穿晶断裂;800℃、850℃经不同时间时效处理,1000h处持久强度最低,这与γ′相尺寸变化有关;随时效温度的升高,试验合金750℃/510MPa的持久激活能降低,持久强度下降。

关键词(KeyWords)： 镍基合金;长期时效;TCP相(拓扑密排相);持久性能;持久激活能

Abstract:

Keywords:

基金项目(Foundation): 国家“十五”科技攻关项目(冶No.0050390B);; 辽宁省博士启动基金项目(20051010);; 辽宁省航空专项基金项目(2005400607)

作者(Author): 崔彤,王继杰,王磊,杨洪才,赵光普

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