温道胜,王守仁,单德彬,宗影影.TiAl基合金在置氢退火过程中γ相120o<111>孪晶界形成机制研究[J].稀有金属材料与工程,2019,48(9):2789~2993.[Wen Daosheng,Wang Shouren,Shan Debin,Zong Yingying.Investigation on the formation mechanism of 120o<111> twin boundaries in γ phase of a TiAl based alloy during annealing treatment in hydrogen atmosphere[J].Rare Metal Materials and Engineering,2019,48(9):2789~2993.]
TiAl基合金在置氢退火过程中γ相120o<111>孪晶界形成机制研究
投稿时间:2018-02-03??修订日期:2018-04-04
中文关键词:??TiAl基合金??退火热处理????静态再结晶??120o<111>孪晶界
基金项目:国家自然科学基金项目(51275132, 51705199, 51372101),山东省自然科学基金项目(ZR2017BEE055),山东省优秀中青年科学家奖励基金(ZR2016EMB01),山东省泰山学者工程专项(2016-2020)
中文摘要:
??????本文利用金相显微镜、扫描电镜、EBSD技术、透射电镜和X射线衍射研究了铸态和锻态Ti–46Al–2V–1Cr–0.3Ni合金退火过程中氢对γ相120o<111>孪晶界的影响规律。结果表明,氢可以促进铸态和锻态合金γ相的静态再结晶,并且再结晶程度随氢含量的增加而增大;大量再结晶晶粒具有120o<111> 孪晶界,并揭示了120o<111> 孪晶界含量与氢含量的关系。氢致120o<111> 孪晶界增多的原因是氢减弱了γ相的弹性各向异性。
Investigation on the formation mechanism of 120o<111> twin boundaries in γ phase of a TiAl based alloy during annealing treatment in hydrogen atmosphere
英文关键词:TiAl based alloy??Annealing treatment??Hydrogen??Static recrystallization??120o<111> twin boundaries
英文摘要:
??????The effect of hydrogen on 120o<111> twin boundaries in γ phase of an as-cast and as-forged Ti–46Al–2V–1Cr–0.3Ni alloy was investigated by means of annealing treatment in hydrogen atmosphere, and the microstructure was observed by an optical microscopy, a scanning electron microscopy, an electron back scattered diffraction technique, a transmission electron microscopy and a X-ray diffraction apparatus. The results showed that hydrogen could promote γ-phase static recrystallization of the as-cast and as-forged alloy, and the extent of static recrystallization increased with increasing hydrogen content. Many static recrystallization grains possessed 120o<111> twin boundaries. The relationship between the fraction of 120o<111> twin boundaries and hydrogen content was given. Hydrogen-weakened γ-phase elastic anisotropy increased 120o<111> twin boundaries.
作者单位E-mail
温道胜?济南大学?daoshenghit@163.com?
王守仁?济南大学??
单德彬?哈尔滨工业大学??
宗影影?哈尔滨工业大学?hagongda@hit.edu.cn?
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