复合添加微量Mn、Zn、Ti对Al-Cu-Li-Mg-Ag-Zr合金组织和性能的影响

doi:10.13251/j.issn.0254-6051.2024.11.001

金属热处理 ›› 2024, Vol. 49 ›› Issue (11): 1-9.DOI: 10.13251/j.issn.0254-6051.2024.11.001

• 材料研究 • 下一篇

复合添加微量Mn、Zn、Ti对Al-Cu-Li-Mg-Ag-Zr合金组织和性能的影响

徐庆, 尹登峰, 王华, 谢凯文, 宋转转

中南大学材料科学与工程学院,湖南长沙 410083

收稿日期:2024-06-03 修回日期:2024-09-20 出版日期:2024-11-25 发布日期:2025-01-09
通讯作者: 尹登峰,教授,博士,E-mail:dfyin@126.com
作者简介:徐庆(1999—),男,硕士研究生,主要研究方向为高强铝锂合金组织性能,E-mail:1470579337@qq.com。
基金资助:
广东省科技计划(0214B090903012);徐州市科技计划(KC20006)

Effect of composite addition of trace amounts of Mn, Zn and Ti on microstructure and mechanical properties of Al-Cu-Li-Mg-Ag-Zr alloy

Xu Qing, Yin Dengfeng, Wang Hua, Xie Kaiwen, Song Zhuanzhuan

School of Materials Science and Engineering, Central South University, Changsha Hunan 410083, China

Received:2024-06-03 Revised:2024-09-20 Online:2024-11-25 Published:2025-01-09

摘要/Abstract

摘要： 通过拉伸试验机、金相显微镜、扫描电镜、透射电镜等设备研究了微量Mn、Zn、Ti元素的复合添加对Al-Cu-Li-Mg-Ag-Zr合金组织和力学性能的影响。结果表明,复合添加微量Mn、Zn、Ti元素能显著细化铸态合金晶粒组织,同时使固溶态合金中的难溶第二相Al(CuMnFe)也得到细化;复合添加微量Mn、Zn、Ti元素能有效促进T6、T8峰时效态Al-Cu-Li-Mg-Ag-Zr合金中主要强化相T₁细小弥散地析出,提高合金力学性能;相比T6峰时效态,Al-Cu-Li-Mg-Ag-Zr合金在T8峰时效态析出的T₁相数量明显增多、尺寸明显减小,分布更均匀弥散,强度和塑性显著提高。

关键词: Al-Cu-Li-Mg-Ag-Zr合金, 微合金化元素, 热处理, 力学性能, 显微组织

Abstract: Effect of composite addition of trace amounts of Mn, Zn and Ti on the microstructure and mechanical properties of Al-Cu-Li-Mg-Ag-Zr alloy was studied by using tensile testing machine, metallographic microscope, scanning electron microscope and transmission electron microscope. The results show that the composite addition of trace amounts of Mn, Zn and Ti elements can significantly refine the grain structure of the as-cast alloy, and at the same time, the insoluble second phase Al(CuMnFe) in the solution treated alloy is also refined. The composite addition of trace amounts of Mn, Zn and Ti elements can effectively promote the precipitation of the main strengthening phase T₁ in the T6 and T8 peak aged Al-Cu-Li-Mg-Ag-Zr alloy, improving the mechanical properties of the alloy. Compared with the T6 peak aged, the amount of T₁ phase precipitated in the T8 peak aged Al-Cu-Li-Mg-Ag-Zr alloy significantly increases, the size significantly decreases, the distribution is more uniform and dispersed, and the strength and plasticity are significantly improved.

Key words: Al-Cu-Li-Mg-Ag-Zr alloy, microalloying element, heat treatment, mechanical properties, microstructure

中图分类号:

TG146.2

徐庆, 尹登峰, 王华, 谢凯文, 宋转转. 复合添加微量Mn、Zn、Ti对Al-Cu-Li-Mg-Ag-Zr合金组织和性能的影响[J]. 金属热处理, 2024, 49(11): 1-9.

Xu Qing, Yin Dengfeng, Wang Hua, Xie Kaiwen, Song Zhuanzhuan. Effect of composite addition of trace amounts of Mn, Zn and Ti on microstructure and mechanical properties of Al-Cu-Li-Mg-Ag-Zr alloy[J]. Heat Treatment of Metals, 2024, 49(11): 1-9.

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复合添加微量Mn、Zn、Ti对Al-Cu-Li-Mg-Ag-Zr合金组织和性能的影响

Effect of composite addition of trace amounts of Mn, Zn and Ti on microstructure and mechanical properties of Al-Cu-Li-Mg-Ag-Zr alloy

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