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材料工程  2019, Vol. 47 Issue (5): 107-114    DOI: 10.11868/j.issn.1001-4381.2018.001095
  研究论文 本期目录 | 过刊浏览 | 高级检索 |
基于不同原始组织预设变形第四代单晶高温合金的再结晶行为
史振学, 刘世忠, 赵金乾, 王效光, 李嘉荣
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
Recrystallization behavior of the fourth generation single crystal superalloy based on different original microstructure preset strain
SHI Zhen-xue, LIU Shi-zhong, ZHAO Jin-qian, WANG Xiao-guang, LI Jia-rong
Science and Technology on Advanced High Temperature Structural Materials Laboratory, AECC Beijing Institute of Aeronautical Materials, Beijing 100095, China
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摘要 第四代单晶高温合金标准热处理试样和铸态试样压痕后分别在1100,1150,1200,1250,1300℃和1340℃退火处理,采用光学显微镜、扫描电镜、电子背散射仪研究不同条件的再结晶组织。结果表明:1100,1150,1200℃退火处理后,标准热处理试样和铸态试样都出现胞状再结晶。1250℃退火处理后,标准热处理试样和铸态试样都为混合再结晶。1300℃退火处理后,标准热处理试样再结晶组织全部为等轴再结晶,而铸态试样仍为混合再结晶。1340℃退火处理后,标准热处理试样和铸态试样都形成了等轴再结晶。随着退火温度升高,标准热处理试样和铸态试样的再结晶层深度明显增加,标准热处理试样再结晶深度明显大于铸态试样,相同条件下标准热处理试样的再结晶晶粒更容易长大。再结晶与基体的界面为小角度晶界、大角度晶界,而再结晶晶粒之间为小角度晶界、大角度晶界和孪晶界。孪晶在单晶高温合金再结晶的过程中发挥了重要作用。
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史振学
刘世忠
赵金乾
王效光
李嘉荣
关键词 单晶高温合金原始组织再结晶晶界    
Abstract:The specimens of the fourth generation single crystal superalloy after heat treatment and at as-cast state were indented and annealed in vacuum at 1100, 1150, 1200, 1250, 1300℃ and 1340℃, respectively. The recrystallized microstructures of the alloy were examined by optical microscopy (OM), scanning electron microscopy (SEM) and electron back scattering diffraction (EBSD). The results show that cellular recrystallization (CRX) occurs in the standard heat treatment samples and as-cast samples after annealing treatment at 1100, 1150℃ and 1200℃. Mixed recrystallization occurs in standard heat treatment samples and as-cast samples after annealing treatment at 1250℃. Equiaxed recrystallization (ERX) develops when the standard heat treatment samples are annealed treatment at 1300℃, while mixed recrystallization occurs in as-cast samples at same condition. ERX develops when these two samples are annealed at 1340℃. The recrystallized layer depth of these two samples increases with the increase of annealing treatment temperature and the depth of standard heat treatment samples is obviously larger than that of as-cast samples.The recrystallized grain of standard heat treatment samples easily grows up at same condition. The interface between the recrystallization grain and original grain is low angle boundary and high angle boundary, while the interface between adjacent recrystallization grains is low angle boundary, high angle boundary, and twinning boundary. It can be inferred that the formation of twins can play an important role in the process of recrystallization.
Key wordssingle crystal superalloy    original microstructure    recrystallization    grain boundary
收稿日期: 2018-09-17      出版日期: 2019-05-17
中图分类号:  TG132.3+2  
  TG146.1+5  
通讯作者: 史振学(1975-),男,博士,高级工程师,研究方向为单晶高温合金,联系地址:北京市81信箱1分箱(100095),E-mail:shizhenxue@126.com     E-mail: shizhenxue@126.com
引用本文:   
史振学, 刘世忠, 赵金乾, 王效光, 李嘉荣. 基于不同原始组织预设变形第四代单晶高温合金的再结晶行为[J]. 材料工程, 2019, 47(5): 107-114.
SHI Zhen-xue, LIU Shi-zhong, ZHAO Jin-qian, WANG Xiao-guang, LI Jia-rong. Recrystallization behavior of the fourth generation single crystal superalloy based on different original microstructure preset strain. Journal of Materials Engineering, 2019, 47(5): 107-114.
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http://jme.biam.ac.cn/CN/10.11868/j.issn.1001-4381.2018.001095      或      http://jme.biam.ac.cn/CN/Y2019/V47/I5/107
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