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[1]史振学,赵金乾.一种单晶高温合金不同温度的高周疲劳性能[J].有色金属科学与工程,2019,(03):1-5.
 SHI Zhenxue,ZHAO Jinqian.High cycle fatigue properties of a single crystal superalloy at different temperature[J].,2019,(03):1-5.
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一种单晶高温合金不同温度的高周疲劳性能(/HTML)
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《有色金属科学与工程》[ISSN:1674-9669/CN:36-1311/TF]

卷:
期数:
2019年03期
页码:
1-5
栏目:
出版日期:
2019-05-20

文章信息/Info

Title:
High cycle fatigue properties of a single crystal superalloy at different temperature
作者:
史振学赵金乾
(北京航空材料研究院 先进高温结构材料重点实验室, 北京100095)
Author(s):
SHI Zhenxue ZHAO Jinqian
(Science and Technology on Advanced High Temperature Structural Materials Laboratory, Beijing Institute of Aeronautical Materials, Beijing 100095 )
关键词:
单晶高温合金 高周疲劳性能断口
分类号:
TG132.3+2
DOI:
-
文献标志码:
A
摘要:
研究了一种单晶高温合金700 ℃和800 ℃的高周疲劳性能,采用扫描电镜和透射电镜分析了断口和断裂机制。结果表明,随着温度升高,合金的疲劳强度系数降低,Basquin系数增加,高周疲劳极限降低。合金700 ℃与800 ℃具有相同的高周疲劳断口,都有几个{111}面平面组成,为类解理断裂机制。疲劳断口由裂纹源区、扩展区和瞬断区三部分组成。裂纹起源于试样的表面或亚表面,并沿{111}面扩展。扩展区可见河流状花样、滑移带、疲劳弧线和疲劳条带特征。瞬断区可见解理台阶和撕裂棱。断裂后γ′相仍保持立方形状,位错不均匀分布在γ基体通道中。

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备注/Memo

备注/Memo:
收稿日期:2018-12-15基金项目:国防基金项目资助(9140A18040115HK51248)通信作者:史振学,(1975- ),男,博士,高级工程师,从事单晶高温合金研究. Email:shizhenxue@126.com.41
更新日期/Last Update: 2019-03-19