| 2050铝锂合金薄板拉伸性能及晶间腐蚀与时效的相关性 |
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| 引用本文： | 李昊然,李湛琦,汪珈逸,叶志豪,李劲风,胡小清.2050铝锂合金薄板拉伸性能及晶间腐蚀与时效的相关性[J].金属热处理,2021,46(5):150-155. |
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| 作者姓名： | 李昊然 李湛琦 汪珈逸 叶志豪 李劲风 胡小清 |
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| 作者单位： | 中南大学 材料科学与工程学院, 湖南 长沙 410083 |
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| 基金项目： | 国家高技术研究发展计划(863计划)(2013AA032401);湖南省大学生创新训练计划(S2020105330994) |
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| 摘 要： | 采用拉伸性能测试、浸泡腐蚀及透射电镜(TEM)观察,研究了2050铝锂合金薄板T6及T8态时效时后的拉伸性能、晶间腐蚀(IGC)及微观组织。结果表明,T8态时效2050铝锂合金强度及伸长率均明显高于T6态时效。T6及T8态时效时,合金IGC敏感性随时效延长至峰时效阶段而逐渐降低;进一步延长至过时效阶段,IGC敏感性有所增加。另外,T8态时效时IGC敏感性明显低于T6态时效。基于提高强度、伸长率及降低IGC敏感性的综合考虑,2050铝锂合金薄板适宜的时效制度为T8态峰值时效,相应合金具有最高的强度(抗拉强度529 MPa)、良好的伸长率(10%)及最低的IGC敏感性。
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| 关 键 词： | 铝锂合金 拉伸性能 晶间腐蚀 时效 |
| 收稿时间： | 2020-10-27 |
Effect of aging on tensile properties and intergranular corrosion sensitivity of 2050 Al-Li alloy |
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| Li Haoran,Li Zhanqi,Wang Jiayi,Ye Zhihao,Li Jinfeng,Hu Xiaoqing.Effect of aging on tensile properties and intergranular corrosion sensitivity of 2050 Al-Li alloy[J].Heat Treatment of Metals,2021,46(5):150-155. |
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| Authors: | Li Haoran Li Zhanqi Wang Jiayi Ye Zhihao Li Jinfeng Hu Xiaoqing |
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| Affiliation: | School of Materials Science and Engineering, Central South University, Changsha Hunan 410083, China |
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| Abstract: | Tensile properties, intergranular corrosion (IGC) and microstructure of 2050 Al-Li alloy sheet after T6 and T8 aging for various time were investigated through tensile property measurement, immersion corrosion and transmission electron microscope (TEM) observation. The results show that the strength and elongation of the T8 aged alloy are much higher than those of the T6 aged alloy. The IGC sensitivity decreases with the T6 and T8 aging extension from initial aging to peak-aging. Further T6 and T8 aging increases the IGC sensitivity. In addition, the IGC sensitivity under the T8 aging condition is much lower than that under the T6 aging condition. Based on the strength, elongation and IGC sensitivity, the appropriate aging for 2050 Al-Li alloy sheet is T8 peak-aging, the corresponding alloy possesses the highest strength (tensile strength 529 MPa), good elongation (10%) and the lowest IGC sensitivity. |
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| Keywords: | Al-Li alloy tensile property intergranular corrosion aging |
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