| 时效处理对挤压成型2195铝锂合金组织和力学性能的影响 |
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| 引用本文： | 王志文,杨荣东,黄元春,李辉.时效处理对挤压成型2195铝锂合金组织和力学性能的影响[J].金属热处理,2022,47(9):6-11. |
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| 作者姓名： | 王志文 杨荣东 黄元春 李辉 |
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| 作者单位： | 1.中南大学 轻合金研究院, 湖南 长沙 410083;2.西南铝业有限责任公司, 重庆 401326;3.中南大学 机电工程学院, 湖南 长沙 410083 |
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| 基金项目： | 国家自然科学基金(U1837207) |
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| 摘 要： | 研究了热处理对挤压态2195铝锂合金组织和力学性能的影响。结果表明,固溶处理和人工时效处理对挤压合金的力学性能有显著的增强作用,这与析出相的类型、尺寸、数量密度和分布有关。2195铝锂合金在时效过程中的析出顺序为过饱和固溶体(SSSS)→GP区+δ′/β′(Al3(Li,Zr))→δ′+θ′(Al2Cu) +T1 (Al2CuLi)→θ′+T1;其中T1相在析出强化中起主导作用。2195铝锂合金经过525 ℃×60 min固溶后在170 ℃人工时效的峰时效时间是36 h,此时抗拉强度、屈服强度和伸长率分别为579 MPa、537 MPa和5.5%。
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| 关 键 词： | 2195铝锂合金 固溶处理 时效 力学性能 析出相 |
| 收稿时间： | 2022-04-21 |
Effect of aging treatment on microstructure and mechanical properties of extruded 2195 Al-Li alloy |
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| Wang Zhiwen,Yang Rongdong,Huang Yuanchun,Li Hui.Effect of aging treatment on microstructure and mechanical properties of extruded 2195 Al-Li alloy[J].Heat Treatment of Metals,2022,47(9):6-11. |
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| Authors: | Wang Zhiwen Yang Rongdong Huang Yuanchun Li Hui |
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| Affiliation: | 1. Light Alloy Research Institute, Central South University, Changsha Hunan 410083, China;2. Southwest Aluminum Co. , Ltd, Chongqing 401326, China;3. School of Mechanical and Electrical Engineering, Central South University, Changsha Hunan 410083, China |
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| Abstract: | Effect of heat treatment on microstructure and mechanical properties of as-extruded 2195 Al-Li alloy was investigated. The results show that the mechanical properties of the as-extruded alloy can be significantly enhanced by solution treatment and artificial aging treatment, which is related to the type, size, number density and distribution of precipitated phases. The 2195 Al-Li alloy precipitation sequence during the aging process is SSSS(supersaturated solid solution)→GP zone+δ′/β′(Al3(Li,Zr))→δ′+θ′(Al2Cu)+T1(Al2CuLi)→θ′+T1. The T1 phase plays a leading role in precipitation strengthening. After solution treatment at 525 ℃ for 60 min and artificial aging at 170 ℃, the peak aging time of the 2195 Al-Li alloy is 36 h, under which the tensile strength, yield strength and elongation are 579 MPa, 537 MPa and 5.5%, respectively. |
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| Keywords: | 2195 Al-Li alloy solution treatment aging mechanical properties precipitated phase |
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