新型多相TiAl合金的β/B2相含量变化及其对拉伸性能的影响
V252.2%TG146.2; 以新型多相TiAl合金(Ti-43.5Al-6(Nb、Cr、Ta))的挤压态组织为研究对象,先通过热处理分析该合金中β/B2相、α/α2 相和γ相平均含量随固溶温度和保温时间的演变规律,然后测试合金在三相区内不同β/B2相含量时的室温和高温(750℃和 800℃)拉伸性能.结果表明:在 1190～1350℃范围内,γ相含量随固溶温度的升高和保温时间的延长逐渐减少,在 1270℃时,γ相完全消失;在 1190～1350℃范围内,β/B2相含量随固溶温度的升高先减少后增加,随保温时间的延长逐渐减少,而层片团的含量和尺寸与β/B2相的含量变化负相关;在 1230～12...
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| Published in | 航空材料学报 Vol. 44; no. 4; pp. 96 - 108 |
|---|---|
| Main Authors | , , , |
| Format | Journal Article |
| Language | Chinese |
| Published |
中国航发北京航空材料研究院,北京 100095
01.08.2024
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| Subjects | |
| Online Access | Get full text |
| ISSN | 1005-5053 |
| DOI | 10.11868/j.issn.1005-5053.2022.000181 |
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| Abstract | V252.2%TG146.2; 以新型多相TiAl合金(Ti-43.5Al-6(Nb、Cr、Ta))的挤压态组织为研究对象,先通过热处理分析该合金中β/B2相、α/α2 相和γ相平均含量随固溶温度和保温时间的演变规律,然后测试合金在三相区内不同β/B2相含量时的室温和高温(750℃和 800℃)拉伸性能.结果表明:在 1190～1350℃范围内,γ相含量随固溶温度的升高和保温时间的延长逐渐减少,在 1270℃时,γ相完全消失;在 1190～1350℃范围内,β/B2相含量随固溶温度的升高先减少后增加,随保温时间的延长逐渐减少,而层片团的含量和尺寸与β/B2相的含量变化负相关;在 1230～1280℃范围内,β/B2相平均含量可控制在 10%以下;在 1250～1270℃范围内,延长保温时间可将β/B2相平均含量控制在 0.5%以下;当合金处于三相区时,控制β/B2相平均含量约 6%,可得到综合拉伸性能优异的均匀细小近层片组织,且该组织的室温抗拉强度超过 1050 MPa、室温伸长率 1.5%～2%,750℃抗拉强度超过 950 MPa,800℃抗拉强度超过850 MPa. |
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| AbstractList | V252.2%TG146.2; 以新型多相TiAl合金(Ti-43.5Al-6(Nb、Cr、Ta))的挤压态组织为研究对象,先通过热处理分析该合金中β/B2相、α/α2 相和γ相平均含量随固溶温度和保温时间的演变规律,然后测试合金在三相区内不同β/B2相含量时的室温和高温(750℃和 800℃)拉伸性能.结果表明:在 1190～1350℃范围内,γ相含量随固溶温度的升高和保温时间的延长逐渐减少,在 1270℃时,γ相完全消失;在 1190～1350℃范围内,β/B2相含量随固溶温度的升高先减少后增加,随保温时间的延长逐渐减少,而层片团的含量和尺寸与β/B2相的含量变化负相关;在 1230～1280℃范围内,β/B2相平均含量可控制在 10%以下;在 1250～1270℃范围内,延长保温时间可将β/B2相平均含量控制在 0.5%以下;当合金处于三相区时,控制β/B2相平均含量约 6%,可得到综合拉伸性能优异的均匀细小近层片组织,且该组织的室温抗拉强度超过 1050 MPa、室温伸长率 1.5%～2%,750℃抗拉强度超过 950 MPa,800℃抗拉强度超过850 MPa. |
| Abstract_FL | The as-extruded microstructure of novel multiphase TiAl alloy(Ti-43.5Al-6(Nb,Cr,Ta))was taken as the research object,the evolution of the average content of β/B2 phase,α/α2 phase and γ phase in this alloy with the solution temperature and holding time was analyzed by heat treatment,and then the tensile properties of the alloy at room temperature and high temperature(750℃ and 800℃)with different β/B2 phase contents were tested.The results show that in the range of 1190℃ to 1350℃,the content of γ phase decreases gradually with the increase of solution temperature and holding time,and the γ phase disappears completely at 1270℃;the content of β/B2 phase first decreases and then increases with the increase of solution temperature,and gradually decreases with the prolongation of holding time,while the content and size of lamellar cluster have a negative correlation with the change of β/B2 phase content;The average content of β/B2 phase can be controlled below 10％in the range of 1230-1280℃;the average content of β/B2 phase can be controlled below 0.5％in the range of 1250-1270℃.When the alloy is in the three-phase region,the average content of β/B2 phase is about 6％,and the uniform and fine nearly lamellar structure with excellent comprehensive tensile properties can be obtained,and the tensile strength at room temperature exceeds 1050 MPa,the elongation at room temperature is 1.5％-2％;the tensile strength at 750℃ exceeds 950 MPa,and the tensile strength at 800℃exceeds 850 MPa. |
| Author | 刘宏武 冯像征 高帆 李臻熙 |
| AuthorAffiliation | 中国航发北京航空材料研究院,北京 100095 |
| AuthorAffiliation_xml | – name: 中国航发北京航空材料研究院,北京 100095 |
| Author_FL | LI Zhenxi GAO Fan FENG Xiangzheng LIU Hongwu |
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| Author_xml | – sequence: 1 fullname: 冯像征 – sequence: 2 fullname: 高帆 – sequence: 3 fullname: 刘宏武 – sequence: 4 fullname: 李臻熙 |
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| DocumentTitle_FL | β/B2 phase content change and its effect on tensile properties of novel multiphase TiAl alloy |
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| Keywords | fine nearly lamellar microstructure 变形TiAl合金 β/B2相 tensile properties β/B2 phase 拉伸性能 multiphase TiAl alloy 细小近层片组织 多相TiAl合金 wrought TiAl alloy |
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| PublicationTitle | 航空材料学报 |
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| Title | 新型多相TiAl合金的β/B2相含量变化及其对拉伸性能的影响 |
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