微量Hf对大角度晶界含Re双晶合金高温持久性能的影响

TG132.3+2; 采用籽晶法制备含有大角度晶界(约20°)的双晶试板,通过分析不同Hf含量(质量分数:0％,0.4％)的含Re合金晶界处析出相、γ/γ'组织、晶界成分及1100℃/100MPa横向持久性能,研究Hf对晶界组织及高温力学性能的影响.结果 表明:Hf显著提高了铸态合金大角度晶界处共晶和碳化物体积分数;热处理后,Hf显著抑制了晶界胞状再结晶组织的形成,含Hf合金的1100℃/100MPa横向持久寿命均显著提高.晶界持久性能与晶界析出相种类、形貌、含量和成分密切相关,而Hf元素在晶界未发现显著的偏聚.本研究对先进镍基单晶合金中晶界缺陷的评价及Hf元素晶界强化作用机制的认识...

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Published in材料工程 Vol. 47; no. 2; pp. 76 - 83
Main Authors 赵云松, 郭媛媛, 赵敬轩, 张晓铁, 刘砚飞, 杨岩, 姜华, 张剑, 骆宇时
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%北京科技大学材料科学与工程学院,北京,100083%北京航空航天大学材料科学与工程学院,北京,100191 20.02.2019
Subjects
持久性能
显微组织
晶界
单晶高温合金
Hf
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ISSN1001-4381
DOI10.11868/j.issn.1001-4381.2018.000767

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Abstract TG132.3+2; 采用籽晶法制备含有大角度晶界(约20°)的双晶试板,通过分析不同Hf含量(质量分数:0％,0.4％)的含Re合金晶界处析出相、γ/γ'组织、晶界成分及1100℃/100MPa横向持久性能,研究Hf对晶界组织及高温力学性能的影响.结果 表明:Hf显著提高了铸态合金大角度晶界处共晶和碳化物体积分数;热处理后,Hf显著抑制了晶界胞状再结晶组织的形成,含Hf合金的1100℃/100MPa横向持久寿命均显著提高.晶界持久性能与晶界析出相种类、形貌、含量和成分密切相关,而Hf元素在晶界未发现显著的偏聚.本研究对先进镍基单晶合金中晶界缺陷的评价及Hf元素晶界强化作用机制的认识具有一定的指导意义.
AbstractList TG132.3+2; 采用籽晶法制备含有大角度晶界(约20°)的双晶试板,通过分析不同Hf含量(质量分数:0％,0.4％)的含Re合金晶界处析出相、γ/γ'组织、晶界成分及1100℃/100MPa横向持久性能,研究Hf对晶界组织及高温力学性能的影响.结果 表明:Hf显著提高了铸态合金大角度晶界处共晶和碳化物体积分数;热处理后,Hf显著抑制了晶界胞状再结晶组织的形成,含Hf合金的1100℃/100MPa横向持久寿命均显著提高.晶界持久性能与晶界析出相种类、形貌、含量和成分密切相关,而Hf元素在晶界未发现显著的偏聚.本研究对先进镍基单晶合金中晶界缺陷的评价及Hf元素晶界强化作用机制的认识具有一定的指导意义.
Author 郭媛媛
姜华
张剑
骆宇时
张晓铁
赵敬轩
杨岩
赵云松
刘砚飞
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%北京科技大学材料科学与工程学院,北京,100083%北京航空航天大学材料科学与工程学院,北京,100191
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Author_FL ZHANG Xiao-tie
ZHANG Jian
ZHAO Yun-song
GUO Yuan-yuan
LIU Yan-fei
YANG Yan
JIANG Hua
LUO Yu-shi
ZHAO Jing-xuan
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DocumentTitle_FL Effects of minor Hf on high temperature stress rupture properties of high angle grain boundary in a Re-containing Ni-based bicrystal superalloy
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显微组织
晶界
单晶高温合金
Hf
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Title 微量Hf对大角度晶界含Re双晶合金高温持久性能的影响
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