一种第三代单晶高温合金中高温横向持久性能

TG132.3; 研究一种镍基第三代单晶(single crystal,SC)高温合金在760℃/800 MPa,980℃/250 MPa与1100℃/137 MPa条件下的横向持久性能.结果表明:在760℃/800 M Pa,980℃/250 M Pa与1100℃/137 M Pa条件下,该合金横向持久寿命与伸长率均低于纵向;横向与纵向持久断裂后的位错组态特征一致,760℃/800 M Pa条件下断裂后γ′相中存在相交的层错,而1100℃/137 M Pa条件下断裂后γ/γ′相界面形成位错缠结与高密度位错网;横向与纵向在760℃/800 M Pa条件下为类解理断裂与韧窝断裂的混合断裂,而在9...

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Published in材料工程 Vol. 48; no. 7; pp. 139 - 145
Main Authors 杨万鹏, 李嘉荣, 刘世忠, 赵金乾, 史振学, 王效光
Format Journal Article
LanguageChinese
Published 中国航发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 20.07.2020
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ISSN1001-4381
DOI10.11868/j.issn.1001-4381.2018.000332

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Abstract TG132.3; 研究一种镍基第三代单晶(single crystal,SC)高温合金在760℃/800 MPa,980℃/250 MPa与1100℃/137 MPa条件下的横向持久性能.结果表明:在760℃/800 M Pa,980℃/250 M Pa与1100℃/137 M Pa条件下,该合金横向持久寿命与伸长率均低于纵向;横向与纵向持久断裂后的位错组态特征一致,760℃/800 M Pa条件下断裂后γ′相中存在相交的层错,而1100℃/137 M Pa条件下断裂后γ/γ′相界面形成位错缠结与高密度位错网;横向与纵向在760℃/800 M Pa条件下为类解理断裂与韧窝断裂的混合断裂,而在980℃/250 M Pa与1100℃/137 M Pa条件下为韧窝断裂;第一代单晶高温合金DD3、第二代单晶高温合金DD6与本研究的第三代单晶高温合金中高温横向持久断裂机制基本一致;外应力方向垂直于定向凝固过程形成的一次枝晶间界面,是横向持久性能低于纵向的主要原因.
AbstractList TG132.3; 研究一种镍基第三代单晶(single crystal,SC)高温合金在760℃/800 MPa,980℃/250 MPa与1100℃/137 MPa条件下的横向持久性能.结果表明:在760℃/800 M Pa,980℃/250 M Pa与1100℃/137 M Pa条件下,该合金横向持久寿命与伸长率均低于纵向;横向与纵向持久断裂后的位错组态特征一致,760℃/800 M Pa条件下断裂后γ′相中存在相交的层错,而1100℃/137 M Pa条件下断裂后γ/γ′相界面形成位错缠结与高密度位错网;横向与纵向在760℃/800 M Pa条件下为类解理断裂与韧窝断裂的混合断裂,而在980℃/250 M Pa与1100℃/137 M Pa条件下为韧窝断裂;第一代单晶高温合金DD3、第二代单晶高温合金DD6与本研究的第三代单晶高温合金中高温横向持久断裂机制基本一致;外应力方向垂直于定向凝固过程形成的一次枝晶间界面,是横向持久性能低于纵向的主要原因.
Author 王效光
刘世忠
李嘉荣
赵金乾
杨万鹏
史振学
AuthorAffiliation 中国航发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
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LI Jia-rong
ZHAO Jin-qian
SHI Zhen-xue
YANG Wan-peng
LIU Shi-zhong
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DocumentTitle_FL Transverse stress rupture properties of a third generation single crystal superalloy at medium and elevated temperatures
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Keywords 位错组态
第三代单晶高温合金
横向持久性能
断裂机制
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Snippet TG132.3; 研究一种镍基第三代单晶(single crystal,SC)高温合金在760℃/800 MPa,980℃/250 MPa与1100℃/137 MPa条件下的横向持久性能.结果表明:在760℃/800 M Pa,980℃/250 M Pa与1100℃/137 M...
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StartPage 139
Title 一种第三代单晶高温合金中高温横向持久性能
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