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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
作者:
作者单位:

1.济南大学;2.哈尔滨工业大学

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）


Investigation on the formation mechanism of 120o<111> twin boundaries in γ phase of a TiAl based alloy during annealing treatment in hydrogen atmosphere
Author:
Affiliation:

1.University of Jinan;2.Harbin Institute of Technology

Fund Project:

the National Natural Science Foundation of China (51275132, 51705199, 51372101), Shandong Provincial Natural Science Foundation, China (ZR2017BEE055),

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    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。

    Abstract:

    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.

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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.]
DOI：10.12442/j. issn.1002-185X. E20180004

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  • 收稿日期:2018-02-03
  • 最后修改日期:2018-04-04
  • 录用日期:2018-04-04
  • 在线发布日期: 2019-10-09

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