形变诱导析出对7A20铝合金组织与性能的影响

doi:10.13251/j.issn.0254-6051.2020.07.016

金属热处理 ›› 2020, Vol. 45 ›› Issue (7): 78-82.DOI: 10.13251/j.issn.0254-6051.2020.07.016

形变诱导析出对7A20铝合金组织与性能的影响

姜少婧^1,2

1. 烟台南山学院, 山东烟台 265713;
2. 山东南山铝业股份有限公司国家铝合金压力加工工程技术研究中心, 山东烟台 265700

收稿日期:2020-02-28 出版日期:2020-07-25 发布日期:2020-09-07
作者简介:姜少婧(1980—), 女, 讲师, 硕士, 主要研究方向为材料的组织与性能, E-mail:jiangshaojing123@163.com
基金资助:
山东省重点研发计划(2019GGX102025);山东省高等学校青创科技计划(2019KJA019)

Effect of deformation induced precipitation on microstructure and properties of 7A20 aluminum alloy

Jiang Shaojing^1,2

1. Yantai Nanshan University, Yantai Shandong 265713, China;
2. National Engineering Research Center for Plastic Working of Aluminum Alloys, Shandong Nanshan Aluminum Co., Ltd., Yantai Shandong 265700, China

Received:2020-02-28 Online:2020-07-25 Published:2020-09-07

摘要/Abstract

摘要： 采用光学显微镜、扫描电镜、透射电镜、X射线衍射仪和拉伸试验机等手段研究了预变形温度和预析出时间对7A20铝合金中第二相析出行为和组织性能的影响。结果表明:300~450 ℃预变形温度下析出的MgZn₂相,粒子尺寸基本在0.1 μm左右,400 ℃析出的粒子数量最多,分布更均匀。不同预处理制度下,合金在400 ℃保温2 h的预析出处理后,屈服强度和抗拉强度达到最高值,分别为170 MPa和310 MPa,同时伸长率也达到20%。拉伸断口均表现为韧性断裂特征。热轧形变和预析出处理后,MgZn₂析出相衍射峰主要出现在40°~45°之间。试验合金1、2和4 h预析出处理后,MgZn₂相的尺寸分别为0.1~0.2、0.3~0.8和0.6~1.0 μm。第二相粒子密度随预析出时间的延长逐渐降低。

关键词: 7A20铝合金, 形变诱导析出, 微观组织, 力学性能

Abstract: Effect of pre-deformation temperature and pre-precipitation time on precipitation behavior of the second phase,microstructure and mechanical properties of 7A20 aluminum alloy was investigated by means of OM, SEM, TEM, XRD and tensile tester. The results indicate that the average size of MgZn₂ phase in the tested alloy is about 0.1 μm, and the fraction of precipitation phase is the most and distributed uniformly when deformed at 400 ℃. The peak value of yield strength and tension strength of the alloy are 170 MPa and 310 MPa, respectively, after pre-precipitation at 400 ℃ for 2 h, while the elongation reaches 20%. The fracture morphologies all exhibit ductile fracture characteristics. XRD peak of MgZn₂ phase precipitates exists in the range of 40°-45° after hot rolling and pre-precipitation. The size of MgZn₂ phase is about 0.1-0.2 μm, 0.3-0.8 μm and 0.6-1.0 μm after pre-precipitation for 1 h, 2 h and 4 h, respectively. The density of MgZn₂ phase decreases with the increase of pre-precipitation time.

Key words: 7A20 aluminum alloy, strain-induced precipitation, microstructure, mechanical properties

中图分类号:

TG142.1

姜少婧. 形变诱导析出对7A20铝合金组织与性能的影响[J]. 金属热处理, 2020, 45(7): 78-82.

Jiang Shaojing. Effect of deformation induced precipitation on microstructure and properties of 7A20 aluminum alloy[J]. Heat Treatment of Metals, 2020, 45(7): 78-82.

参考文献

[1]Miller W S, Zhuang L, Bottema J, et al. Recent development in aluminum alloys for the automotive industry[J]. Materials Science and Engineering A, 2000, 280(1): 37-49.
[2]Hirsch J. Recent development in aluminum for automotive applications[J]. Transactions of Nonferrous Metals Society of China, 2014, 24(7): 1995-2002.
[3]Zhou J, Wan X M, Li Y. Advanced aluminium products and manufacturing technologies applied on vehicles presented at the EuroCarBody conference[J]. Materials Today: Proceedings, 2015, 2(10): 5015-5022.
[4]Shin J, Kim T, Kim D E, et al. Castability and mechanical properties of new 7××× aluminum alloys for automotive chassis/body applications[J]. Journal of Alloys and Compounds, 2017, 698: 577-590.
[5]Fridlyander I N, Sister V G, Grushko O E, et al. Aluminum alloys: Promising materials in the automotive industry[J]. Metal Science and Heat Treatment, 2002, 44(9/10): 365-370.
[6]Tucker Reginald. Trends in automotive lightweighting[J]. Metal Finishing, 2013, 111(2): 23-25.
[7]倪军, 罗益民, 甘甜, 等. 铝合金2219-O热拉伸流变行为研究[J]. 塑性工程学报, 2018, 25(4): 106-112.
Ni Jun, Luo Yimin, Gan Tian, et al. Thermal tensile rheological behavior of aluminum alloy 2219-O[J]. Journal of Plasticity Engineering, 2018, 25(4): 106-112.
[8]Wu B, Li M Q, Ma D W. The flow behavior and constitutive equations in isothermal compression of 7050 aluminum alloy[J]. Materials Science and Engineering A, 2012, 542: 79-87.
[9]Merati A, Eastaugh G. Determination of fatigue related discontinuity state of 7000 series of aerospace aluminum alloys[J]. Engineering Failure Analysis, 2017, 14(4): 673-685.
[10]She H, Shu D, Chu W, et al. Effects of Fe and Si impurities on the microstructure and properties of 7××× high strength aircraft aluminum alloys[J]. Journal of Materials Engineering, 2013, 6: 92-98.
[11]Li D F, Zhang D Z, Liu S D, et al. Dynamic recrystallization behavior of 7085 aluminum alloy during hot deformation[J]. Transactions of Nonferrous Metals Society of China, 2016, 26(6): 1491-1497.
[12]Zhang H, Li L X, Yuan D. Hot deformation behavior of the new Al-Mg-Si-Cu aluminum alloy during compression at elevated temperatures[J]. Materials Characterization, 2007, 58(2): 168-173.

[1]	梁恩溥, 徐乐, 杨勇, 王毛球. 添加Al、Cu对40CrNi3MoV钢组织和力学性能的影响[J]. 金属热处理, 2022, 47(4): 17-23.
[2]	祁晓亮, 李岩, 定巍, 赵增武. 含Al中锰TRIP钢原始组织对临界退火后组织与力学性能的影响[J]. 金属热处理, 2022, 47(4): 24-29.
[3]	陈保安, 张静媛, 祝志祥, 韩钰, 潘学东, 张磊, 陈素红. 化学成分对高强Al-Mg-Si合金组织和性能的影响[J]. 金属热处理, 2022, 47(4): 30-38.
[4]	陈东俊, 李广阳, 刘刚. 时效处理对AlSi9Cu3压铸铝合金组织和力学性能的影响[J]. 金属热处理, 2022, 47(4): 53-56.
[5]	陈连生, 张露友, 田亚强, 杨子旋, 李红斌, 潘红波, 魏英立. 低碳高强舰船用钢的CCT曲线及其组织性能[J]. 金属热处理, 2022, 47(4): 63-68.
[6]	王云龙, 余伟, 张昳, 史佳新, 李明辉. 奥氏体化温度对贝氏体钢等温转变及力学性能的影响[J]. 金属热处理, 2022, 47(4): 80-85.
[7]	骆再斌, 范子泽, 彭振. 轻质高熵合金的研究进展[J]. 金属热处理, 2022, 47(4): 100-107.
[8]	李立, 曾艳, 吴晓春. 4Cr5Mo2VCo钢的热处理工艺优化[J]. 金属热处理, 2022, 47(4): 133-140.
[9]	吕杰晟, 宋志刚, 何建国, 丰涵, 郑文杰, 朱玉亮. S32205双相不锈钢冷轧退火组织转变及强塑化机理分析[J]. 金属热处理, 2022, 47(4): 141-145.
[10]	王琪, 吴光亮. 回火温度对1100 MPa级高强钢组织与性能的影响[J]. 金属热处理, 2022, 47(4): 146-150.
[11]	张骥俊, 邢彦锋, 曹菊勇. 超声振动对CMT电弧增材制造铝合金组织与性能的影响[J]. 金属热处理, 2022, 47(4): 159-164.
[12]	刘文彬, 乔龙阳, 潘新宇, 程格, 李爱娜, 裴新军. 淬火温度对刀剪用M390粉末冶金不锈钢组织和性能的影响[J]. 金属热处理, 2022, 47(4): 189-195.
[13]	王瑞琴, 葛鹏, 廖强, 侯鹏, 刘宇. 固溶冷却方式对短时用高温钛合金板材组织和性能的影响[J]. 金属热处理, 2022, 47(4): 196-198.
[14]	王绍灼, 孟晗, 王芬, 樊海卫, 李燕, 唐超. 改善低氧TC4-LC及重熔TC4钛合金性能的热处理工艺[J]. 金属热处理, 2022, 47(4): 204-207.
[15]	陈强, 陈林芳, 杨明华. 18CrNiMo7-6钢的可控气氛高温渗碳工艺[J]. 金属热处理, 2022, 47(4): 231-239.

形变诱导析出对7A20铝合金组织与性能的影响

Effect of deformation induced precipitation on microstructure and properties of 7A20 aluminum alloy

PDF

可视化

摘要/Abstract

引用本文

使用本文

参考文献

相关文章 15

编辑推荐

Metrics

本文评价