含锰β-γ型TiAl合金B2相中二次γ相和Laves相析出行为与调控机制
结题报告
批准号:
51971215
项目类别:
面上项目
资助金额:
60.0 万元
负责人:
刘奎
依托单位:
学科分类:
金属结构材料与力学行为
结题年份:
2023
批准年份:
2019
项目状态:
已结题
项目参与者:
刘奎
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中文摘要
新一代β-γ型TiAl合金不经过包晶反应,主成分偏析小,且可热加工变形,是很具应用前景的轻质耐高温结构材料。但合金中残存较高含量的B2相,其高温不稳定严重影响部件的安全可靠性,成为限制合金长期服役的关键瓶颈。本项目以Ti42Al5Mn合金为研究对象,研究温度、时间及应力多物理耦合作用下合金组织B2相中γ和Laves相析出、长大、转变行为;揭示γ和Laves相析出引起的B2区域Al、Mn等元素再分配规律及相间的取向关系,结合理论计算阐明B2相转变的内在机制;通过研究热处理和添加少量C、Fe、W元素对B2相中γ和Laves相析出、转变的影响,诠释B2相中γ和Laves相的调控机制,并将其应用于变形Ti42Al5Mn合金中,以期提高合金长期服役组织稳定性。项目对认识β-γ型TiAl合金残存B2相的转变及调控机制具有重要的科学意义,对变形TiAl合金应用也具有重要的参考价值。
英文摘要
Advanced new generation of intermetallic β-solidifying γ-TiAl based alloys with low component segregation due to avoiding the peritectic reaction and certain hot workability, is known as a new generation of lightweight high temperature resistant structural materials with the most potential for application. However, the structural instability of the retained B2 phase in such alloys under service conditions will seriously affect their serviceability and safety reliability, and significantly restricts its high temperature and long-term application. This project chooses a typical β-solidifying γ-TiAl based alloy with the composition of Ti42Al5Mn(at.%). The precipitation behavior of the secondary γ phase and Laves phase in B2 phase will be systematically investigated under multiple physical conditions of temperature, time and stress. The transition intrinsic mechanism of B2 phase will be clarified by studied the redistribution law of Al and Mn in B2 region after the precipitation of γ and Laves phase, the orientation relationship between the two phases and the theoretical calculations. The regulation mechanisms of γ and Laves in B2 phase will be clarified by the heat treatment and key trace (C,Fe,W) elements addition. And then they are applied to the deformed Ti42Al5Mn alloy to improve the stability of the microstructure and properties of the deformed alloy at high temperature for long-term service. This project has important scientific significance for further understanding the transformation and regulation mechanism of the residual B2 phase of β-γ TiAl alloy, and also has an important reference value for the application of the deformed TiAl alloy.
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DOI:--
发表时间:2021
期刊:Intermetallics
影响因子:--
作者:Xiaobing Li;Hongjian Tang;Weiwei Xing;Pengxiang Zhao;Bo Chen;Yingche Ma;Kui Liu
通讯作者:Kui Liu
DOI:10.1016/j.intermet.2020.107022
发表时间:2021
期刊:Intermetallics
影响因子:4.4
作者:Hongjian Tang;Weiwei Xing;Xiao-bing Li;Bo Chen;Peng-xiang Zhao;L. Shu;Mengshu Zhang;Yingche Ma-Yingc
通讯作者:Hongjian Tang;Weiwei Xing;Xiao-bing Li;Bo Chen;Peng-xiang Zhao;L. Shu;Mengshu Zhang;Yingche Ma-Yingc
DOI:10.1016/j.jmst.2023.09.011
发表时间:2023-10
期刊:Journal of Materials Science & Technology
影响因子:--
作者:Peng-xiang Zhao;Hui Ma;Xiao-bing Li;Ming Gao;Yingche Ma;Kui Liu
通讯作者:Peng-xiang Zhao;Hui Ma;Xiao-bing Li;Ming Gao;Yingche Ma;Kui Liu
DOI:--
发表时间:2022
期刊:JOM
影响因子:2.6
作者:Xiaobing Li;Kun Qian;Lei Shu;Mengshu Zhang;Bo Chen;Kui Liu
通讯作者:Kui Liu
DOI:--
发表时间:2023
期刊:Intermetallics
影响因子:--
作者:Gloria Graf;Malina Seyffertitz;Petra Spoerk-Erdely;Helmut Clemens;Andreas Stark;Lukas Hatzenbichler;David Holec;Michael Burtscher;Daniel Kiener;Xiaobing Li;Kui Liu
通讯作者:Kui Liu
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