孿晶界"/> 孿晶界的影響規(guī)律。結(jié)果表明,氫可以促進鑄態(tài)和鍛態(tài)合金γ相的靜態(tài)再結(jié)晶,并且再結(jié)晶程度隨氫含量的增加而增大;大量再結(jié)晶晶粒具有120o<111> 孿晶界,并揭示了120o<111> 孿晶界含量與氫含量的關(guān)系。氫致120o<111> 孿晶界增多的原因是氫減弱了γ相的彈性各向異性。"/>

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TiAl基合金在置氫退火過程中γ相120o<111>孿晶界形成機制研究
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作者單位:

1.濟南大學(xué);2.哈爾濱工業(yè)大學(xué)

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國家自然科學(xué)基金項目(51275132, 51705199, 51372101),山東省自然科學(xué)基金項目(ZR2017BEE055),山東省優(yōu)秀中青年科學(xué)家獎勵基金(ZR2016EMB01),山東省泰山學(xué)者工程專項(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:

    本文利用金相顯微鏡、掃描電鏡、EBSD技術(shù)、透射電鏡和X射線衍射研究了鑄態(tài)和鍛態(tài)Ti–46Al–2V–1Cr–0.3Ni合金退火過程中氫對γ相120o<111>孿晶界的影響規(guī)律。結(jié)果表明,氫可以促進鑄態(tài)和鍛態(tài)合金γ相的靜態(tài)再結(jié)晶,并且再結(jié)晶程度隨氫含量的增加而增大;大量再結(jié)晶晶粒具有120o<111> 孿晶界,并揭示了120o<111> 孿晶界含量與氫含量的關(guān)系。氫致120o<111> 孿晶界增多的原因是氫減弱了γ相的彈性各向異性。

    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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溫道勝,王守仁,單德彬,宗影影. TiAl基合金在置氫退火過程中γ相120o<111>孿晶界形成機制研究[J].稀有金屬材料與工程,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
  • 錄用日期:2018-04-04
  • 在線發(fā)布日期: 2019-10-09
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