热处理对挤压态Al-Zn-Mg-Cu合金显微组织和力学性能的影响

doi:10.13251/j.issn.0254-6051.2020.05.029

金属热处理 ›› 2020, Vol. 45 ›› Issue (5): 152-156.DOI: 10.13251/j.issn.0254-6051.2020.05.029

热处理对挤压态Al-Zn-Mg-Cu合金显微组织和力学性能的影响

魏迪^1,2, 杨莉^1,2,3, 张尧成^1,2,3, 卢王张^2,3, 庞松⁴, 智雅婷^2,3

1. 常州大学材料科学与工程学院, 江苏常州 213164;
2. 江苏省机电产品循环利用技术重点建设实验室, 江苏常熟 215500;
3. 常熟理工学院汽车工程学院, 江苏常熟 215500;
4. 中国兵器科学研究院宁波分院, 浙江宁波 315103

收稿日期:2019-11-01 出版日期:2020-05-25 发布日期:2020-09-02
通讯作者: 杨莉,教授,博士,E-mail: yangli2011@cslg.edu.cn
作者简介:魏迪(1994—),女,硕士研究生,主要研究方向为超高强铝合金的应变行为,E-mail: 17365370059@163.com。
基金资助:
国家自然科学基金(51601171,51865006,51601172);江苏省高等学校自然科学研究项目(19KJA430001,18KJA460001

Effect of heat treatment on microstructure and mechanical properties of extruded Al-Zn-Mg-Cu alloy

Wei Di^1,2, Yang Li^1,2,3, Zhang Yaocheng^1,2,3, Lu Wangzhang^2,3, Pang Song⁴, Zhi Yating^2,3

1. School of Materials Science and Engineering, Changzhou University, Changzhou Jiangsu 213164, China;
2. Jiangsu Key Laboratory of Recycling and Reuse Technology for Mechanical and Electronic Products, Changshu Jiangsu 215500, China;
3. School of Automatic Engineering, Changshu Institute of Technology, Changshu Jiangsu 215500, China;
4. Ningbo Branch of China Academy of Ordnance Science, Ningbo Zhejiang 315103, China

Received:2019-11-01 Online:2020-05-25 Published:2020-09-02

摘要/Abstract

摘要： 采用扫描电镜、硬度测试、拉伸试验及冲击性能测试,研究了3种不同热处理后Al-12Zn-2.4Mg-1.1Cu-0.3Zr-0.15Ni-0.12Mn(质量分数,%)合金显微组织演变与力学性能的变化。结果表明:经T6处理合金的组织主要为α-Al基体、η′和η析出相,合金的平均硬度和抗拉强度分别达到210 HV和597 MPa,高于T4和T5工艺下的合金硬度和强度。η′和η相对于基体有一定的可动性,使合金的塑性降低,T6态合金的伸长率略低于T4态。T4和T5态合金的冲击断裂机制为脆性断裂,T6处理后合金的冲击性能得到明显改善,断裂机制为韧脆混合断裂。挤压态Al-Zn-Mg-Cu合金宜采用T6热处理工艺。

关键词: Al-Zn-Mg-Cu合金, 热处理, 显微组织, 力学性能

Abstract: The microstructure evolution and mechanical properties of Al-12Zn-2.4Mg-1.1Cu-0.3Zr-0.15Ni-0.12Mn (mass fraction, %) alloy under three different heat treatments were investigated by means of scanning microscope, hardness test, tensile test, and impact test. The results show that the microstructure of T6-treated alloy consists of α-Al matrix, η′ and η precipitation phases. The average microhardness and tensile strength of T6-treated alloy reach 210 HV and 597 MPa respectively, which are superior to that of T4-treated and T5-treatd alloy. The elongation of T6-treated alloy is slightly lower than that of T4-treated alloy because η′ and η precipitation phases have a certain mobility relative to the matrix which reduces the plasticity of the alloy. The impact fracture mechanism of T4-treated and T5-treatd alloy is brittle fracture. The impact property of T6-treated alloy is obviously improved and the fracture mechanism is ductile-brittle mixed fracture. T6 heat treatment should be adopted to the extruded Al-Zn-Mg-Cu alloy.

Key words: Al-Zn-Mg-Cu alloy, heat treatment, microstructure, mechanical properties

中图分类号:

TG146.2⁺1

魏迪, 杨莉, 张尧成, 卢王张, 庞松, 智雅婷. 热处理对挤压态Al-Zn-Mg-Cu合金显微组织和力学性能的影响[J]. 金属热处理, 2020, 45(5): 152-156.

Wei Di, Yang Li, Zhang Yaocheng, Lu Wangzhang, Pang Song, Zhi Yating. Effect of heat treatment on microstructure and mechanical properties of extruded Al-Zn-Mg-Cu alloy[J]. Heat Treatment of Metals, 2020, 45(5): 152-156.

参考文献

[1]Lin Y C, Zhang Jinlong, Chen Mingsong. Evolution of precipitates during two-stage stress-aging of an Al-Zn-Mg-Cu alloy[J]. Journal of Alloys and Compounds, 2016, 684: 177-187.
[2]Bai Pucun, Hou Xiaohu, Zhang Xiuyun, et al. Microstructure and mechanical properties of a large billet of spray formed Al-Zn-Mg-Cu alloy with high Zn content[J]. Materials Science and Engineering: A, 2009, 508: 23-27.
[3]Chen Gang, Chen Wei, Zhang Guowei, et al. Microstructures and mechanical properties of Al-12Zn-2.4Mg-1.2Cu alloy under different deformation ways[J]. Rare Metal Materials and Engineering, 2016, 45(9): 2237-3341.
[4]江福清, 黄继武, 刘赟, 等. 固溶-时效对新型高强高淬透性热挤压Al-Zn-Mg-Cu-Zr 合金组织与性能的影响[J]. 金属热处理, 2019, 44(1): 86-90.
Jiang Fuqing, Huang Jiwu, Liu Yun, et al. Effects of solution and aging on microstructure and properties of new high-strength and high-hardenability hot-extruded Al-Zn-Mg-Cu-Zr alloy[J]. Heat Treatment of Metals, 2019, 44(1): 86-90.
[5]Wen Kai, Fan Yunqiang, Wang Guojun, et al. Aging behavior and precipitate characterization of a high Zn-containing Al-Zn-Mg-Cu alloy with various tempers[J]. Materials and Design, 2016, 101: 16-23.
[6]马思图, 车欣, 王莹, 等. 固溶-时效态Al-8Zn-2.5Mg-1.5Cu(-0.15Y)合金的室温和低温拉伸性能[J]. 金属热处理, 2019, 44(2): 167-171.
Ma Situ, Che Xin, Wang Ying, et al. Tensile properties at room and low temperatures of solid-solution treated and aged Al-8Zn-2.5Mg-1.5Cu(-0.15Y) alloys[J]. Heat Treatment of Metals, 2019, 44(2): 167-171.
[7]张坤. 合金元素和热处理制度对高Zn超高强铝合金微观组织和力学性能的影响[D]. 长沙: 中南大学, 2003.
[8]Schloth P, Deschamps A, Gandin Ch A, et al. Modeling of GP(I) zone formation during quench in an industrial AA7449 75 mm thick plate[J]. Materials and Design, 2016, 112: 46-57.
[9]郑山红, 郭巧能, 刘志勇, 等. 双级蠕变时效对含钪7050铝合金力学及耐腐蚀性能的影响[J]. 金属热处理, 2020, 45(1): 193-199.
Zheng Shanhong, Guo Qiaoneng, Liu Zhiyong, et al. Effect of two-stage creep-aging on mechanical properties and corrosion resistance of 7050 aluminum alloy containing Sc[J]. Heat Treatment of Metals, 2020, 45(1): 193-199.
[10]廖飞, 范世通, 邓运来, 等. 高强铝合金中间相Al₂Cu, Al₂CuMg和MgZn₂性能的第一性原理计算[J]. 航空材料学报, 2016, 36(6): 1-8.
Liao Fei, Fan Shitong, Deng Yunlai, et al. First-principle calculations of mechanical properties of Al₂Cu, Al₂CuMg and MgZn₂ intermetallics in high strength aluminum alloys[J]. Journal of Aeronautical Materials, 2016, 36(6): 1-8.
[11]刘飞, 白朴存, 侯小虎, 等. Al-Zn-Mg-Cu合金时效沉淀相应变场研究[J]. 稀有金属材料与工程, 2012, 41(S2): 520-523.
Liu Fei, Bai Pucun, Hou Xiaohu, et al. Investigation of strain field of precipitates in an Al-Zn-Mg-Cu alloy[J]. Rare Metal Materials and Engineering, 2012, 41(S2): 520-523.
[12]向剑波, 陈伟, 熊落保, 等. 7055铝合金的非等温时效工艺[J]. 金属热处理, 2019, 44(1): 190-194.
Xiang Jianbo, Chen Wei, Xiong Luobao, et al. Non-isothermal aging of 7055 aluminum alloy[J]. Heat Treatment of Metals, 2019, 44(1): 190-194.
[13]Khalfallah A, Raho A A, Amzert S, et al. Precipitation kinetics of GP zones, metastable η′ phase and equilibrium η phase in Al-5.46wt.%Zn-1.67wt.%Mg alloy[J]. Transactions of Nonferrous Metals Society of China, 2019, 29(2): 233-241.
[14]张训, 高智勇, 叶茂, 等. 7055超高强铝合金的时效工艺[J]. 金属热处理, 2015, 40(10): 181-186.
Zhang Xun, Gao Zhiyong, Ye Mao, et al. Aging process of 7055 ultra high strength aluminum alloy[J]. Heat Treatment of Metals, 2015, 40(10): 181-186.
[15]陈辉刚. 铝合金低温下力学性能综述[J]. 机械, 2016, 43(S1): 74-77.
Chen Huigang. Overview on the mechanical properties of aluminum at low temperatures[J]. Machinery, 2016, 43(S1): 74-77.
[16]Ren Jian, Wang Richu, Feng Yan, et al. Microstructure evolution and mechanical properties of an ultrahigh strength Al-Zn-Mg-Cu-Zr-Sc (7055) alloy processed by modified powder hot extrusion with post aging[J]. Vacuum, 2019, 161: 434-442.
[17]Zuo Jinrong, Hou Longgang, Shi Jintao, et al. The mechanism of grain refinement and plasticity enhancement by an improved thermomechanical treatment of 7055 Al alloy[J]. Materials Science and Engineering: A, 2017, 702: 42-52.
[18]王春华, 杨丽娟, 尹红霞, 等. 时效处理对高锌7075铝合金力学性能的影响[J]. 金属热处理, 2018, 43(12): 148-151.
Wang Chunhua, Yang Lijuan, Yin Hongxia, et al. Effect of aging treatment on mechanical properties of 7075 aluminum alloy with high Zn content[J]. Heat Treatment of Metals, 2018, 43(12): 148-151.

热处理对挤压态Al-Zn-Mg-Cu合金显微组织和力学性能的影响

Effect of heat treatment on microstructure and mechanical properties of extruded Al-Zn-Mg-Cu alloy

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