Effect of aging treatment on microstructure and mechanical properties of cryorolled Al-4.5Cu-1.5Mg-0.1Er alloy

doi:10.13251/j.issn.0254-6051.2023.10.027

Abstract

Abstract: Effect of aging treatment on microstructure and mechanical properties of cryorolled Al-4.5Cu-1.5Mg-0.1Er alloy plate was studied by means of optical microscope (OM), X-ray diffractometer (XRD), scanning electron microscope (SEM) and tensile tester. The results show that the amount of precipitated phases in the Al-4.5Cu-1.5Mg-0.1Er alloy after aging is increased and the distribution is more uniform, which are mainly S(Al₂CuMg) phase and θ(Al₂Cu) phase. As the aging temperature increases and the aging time is extended, part of the second phase redissolves and coarsens, resulting in the degradation of alloy properties. The best comprehensive properties are obtained when the cryorolled Al-4.5Cu-1.5Mg-0.1Er alloy plates are aged at 180 ℃ for 8 h, of which the tensile strength and elongation reach 541 MPa and 11.33%, respectively, improving by 58 MPa and 7.11% compared with that without aging. Meanwhile, the fracture type of the alloy is ductile fracture.

Key words: Al-Cu-Mg-Er alloy, aging treatment, microstructure, mechanical properties, texture

CLC Number:

TG146.2

Xie Shangheng, Sun Youping, He Jiangmei, Zhu Jiaxin, Fang Dejun. Effect of aging treatment on microstructure and mechanical properties of cryorolled Al-4.5Cu-1.5Mg-0.1Er alloy[J]. Heat Treatment of Metals, 2023, 48(10): 182-187.

References

[1]张新明, 邓运来, 张勇. 高强铝合金的发展及其材料的制备加工技术[J]. 金属学报, 2015, 51(3): 257-271.
Zhang Xinming, Deng Yunlai, Zhang Yong. Development of high strength aluminum alloys and processing techniques for the materials[J]. Acta Metallurgica Sinica, 2015, 51(3): 257-271.
[2]Li H, Xu W, Wang Z, et al. Effects of re-ageing treatment on microstructure and tensile properties of solution treated and cold-rolled Al-Cu-Mg alloys[J]. Materials Science and Engineering A, 2016, 650: 254-263.
[3]王松辉, 孙有平, 何江美, 等. 固溶时效对2524合金板材组织和性能的影响[J]. 特种铸造及有色合金, 2018, 38(11): 1248-1253.
Wang Songhui, Sun Youping, He Jiangmei, et al. Effects of solid solution and aging treatment on microstructure and mechanical properties of 2524 aluminum alloy sheet[J]. Special Casting and Nonferrous Alloys, 2018, 38(11): 1248-1253.
[4]Hu Z, Fan C, Tong S, et al. Effect of aging treatment on evolution of S′ phase in rapid cold punched Al-Cu-Mg alloy[J]. Transactions of Nonferrous Metals Society of China, 2021, 31(7): 1930-1938.
[5]Jayaganthan R. Effects of warm rolling and ageing after cryogenic rolling on mechanical properties and microstructure of Al 6061 alloy[J]. Materials and Design, 2012, 39: 226-233.
[6]杨温豪, 张辉. 热处理与热挤压对体育器械用Al-Cu-Mg合金微观组织和性能的影响[J]. 热加工工艺, 2021, 50(20): 122-125, 130.
Yang Wenhao, Zhang Hui. Effects of heat treatment and hot extrusion on microstructure and properties of Al-Cu-Mg alloy for sports equipment[J]. Hot Working Technology, 2021, 50(20): 122-125, 130.
[7]黄冬来, 邢亮. Al-Cu-Mg合金的热处理与变形工艺研究[J]. 铸造技术, 2017, 38(9): 2133-2136.
Huang Donglai, Xing Liang. Study on heat treatment and deformation process for Al-Cu-Mg alloy[J]. Foundry Technology, 2017, 38(9): 2133-2136.
[8]Li H, Xu W, Wang Z, et al. Effects of re-ageing treatment on microstructure and tensile properties of solution treated and cold-rolled Al-Cu-Mg alloys[J]. Materials Science and Engineering A, 2016, 650: 254-263.
[9]苏睿明, 贾咏馨, 胡诗扬, 等. 二次时效对Al-Cu-Mg合金组织及性能的影响[J]. 机械工程学报, 2022, 58(4): 102-110.
Su Ruiming, Jia Yongxin, Hu Shiyang, et al. Effects of secondary aging on microstructure and properties of Al-Cu-Mg alloy[J]. Journal of Mechanical Engineering, 2022, 58(4): 102-110.
[10]Shanmugasundaram T, Murty B S, Sarma V S. Development of ultrafine grained high strength Al-Cu alloy by cryorolling[J]. Scripta Materialia, 2006, 54(12): 2013-2017.
[11]吴红艳, 杨丽娟, 杜林秀, 等. 退火工艺对深冷轧制6061铝合金显微组织及力学性能的影响[J]. 材料热处理学报, 2020, 41(5): 72-78.
Wu Hongyan, Yang Lijuan, Du Linxiu, et al. Effect of annealing process on microstructure and mechanical properties of cryorolled 6061 aluminum alloy[J]. Transactions of Materials and Heat Treatment, 2020, 41(5): 72-78.
[12]贾海龙, 张海涛, 艾峥嵘, 等. 退火温度对深冷轧制6063铝合金组织性能的影响[J]. 热加工工艺, 2013, 42(22): 159-162, 166.
Jia Hailong, Zhang Haitao, Ai Zhengrong, et al. Effect of annealing temperature on microstructure and mechanical properties of cryo-rolled 6063 Al alloy[J]. Hot Working Technology, 2013, 42(22): 159-162, 166.
[13]殷剑, 金康, 黎诚. 时效处理对7022铝合金组织与性能的影响[J]. 材料热处理学报, 2022, 43(2): 49-57.
Yin Jian, Jin Kang, Li Cheng. Effect of aging treatment on microstructure and properties of 7022 aluminum alloy[J]. Transactions of Materials and Heat Treatment, 2022, 43(2): 49-57.
[14]梁孟超, 陈良, 赵国群. 人工时效对2A12铝板力学性能和强化相的影响[J]. 金属学报, 2020, 56(5): 736-744.
Liang Mengchao, Chen Liang, Zhao Guoqun. Effects of artificial ageing on mechanical properties and precipitation of 2A12 Al sheet[J]. Acta Metallurgica Sinica, 2020, 56(5): 736-744.
[15]Marceau R K W, Sha G, Lumley R N, et al. Evolution of solute clustering in Al-Cu-Mg alloys during secondary ageing[J]. Acta Materialia, 2010, 58(5): 1795-1805.
[16]何俊龙, 郑亚亚, 任杰克, 等. 新型热机械处理对Al-Cu-Mg合金微观组织与综合性能的影响[J]. 矿冶工程, 2021, 41(6): 189-193.
He Junlong, Zheng Yaya, Ren Jieke, et al. Effect of novel thermomechanical treatment on microstructure and comprehensive properties of Al-Cu-Mg alloy[J]. Mining and Metallurgical Engineering, 2021, 41(6): 189-193.
[17]任伟才, 王金花, 丛福官, 等. 7xxx系超高强铝合金板材各向异性的研究现状[J]. 轻合金加工技术, 2019, 47(6): 9-19.
Ren Weicai, Wang Jinhua, Cong Fuguan, et al. Research status of anisotropy of 7xxx series ultra-high-strength aluminum alloy plates[J]. Light Alloy Fabrication Technology, 2019, 47(6): 9-19.
[18]刘轩之, 顾开选, 翁泽钜, 等. 铝合金深冷处理研究进展[J]. 材料导报, 2020, 34(3): 178-183.
Liu Xuanzhi, Gu Kaixuan, Weng Zeju, et al. A review on deep cryogenic treatment of aluminium alloy[J]. Materials Reports, 2020, 34(3): 178-183.
[19]Qian W, Zhao Y, Kai X, et al. Characteristics of microstructural and mechanical evolution in 6111Al alloy containing Al₃(Er,Zr) nanoprecipitates[J]. Materials Characterization, 2021, 178: 111310.