Effect of different annealing processes on surface quality of 5182 aluminum alloy sheet

doi:10.13251/j.issn.0254-6051.2024.04.024

Abstract

Abstract: Microstructure and tensile properties of 5182 aluminum alloy sheets treated under different annealing processes through anodized coating and tensile testing were systematicly studied. The results show that the longer the annealing time is, the larger the grain size of the sheet becomes, and the unsynchronized deformation of the grain size can lead to a shortened yield plateau. The dislocation density in the matrix can be reduced by increasing the annealing temperature. Water cooling can hinder the diffusion of solute atoms towards dislocations, reduce the interaction between solute atoms and dislocations, which helps eliminate the Lüders band during the sheet stamping process. With the increase of annealing temperature, the tensile strength and yield strength of 5182 aluminum alloy sheet is decreased, and when annealed at the same temperature, the strength of furnace cooled alloy sheet is lower than that of air cooled and water cooled, while the change in elongation is not significant.

Key words: 5182 aluminum alloy sheet, Luders band, dislocation, pinning, unpinning

CLC Number:

TG146.2⁺1

Sun Ning, Wang Jingtao, Li Tao, Wang Zhidong, Chi Rui, Xu Zhiyuan, Yang Limin, Guo Fengjia. Effect of different annealing processes on surface quality of 5182 aluminum alloy sheet[J]. Heat Treatment of Metals, 2024, 49(4): 150-156.

References

[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]王孟君, 黄电源, 姜海涛. 汽车用铝合金的研究进展[J]. 金属热处理, 2006, 31(9): 37-49.
Wang Mengjun, Huang Dianyuan, Jiang Haitao. Research progress of aluminum alloy for the automotive industry[J]. Heat Treatment of Metals, 2006, 31(9): 37-49.
[3]Burger G B, Gupta A K, Jeffrey P W, et al. Microstructural control of aluminum sheet used in automotive applications[J]. Materials Characterization, 1995, 35(1): 23-39.
[4]Cole G S, Sherman A M. Light weight materials for automotive applications[J]. Materials Characterization, 1995, 35(1): 3-9.
[5]尹晓辉, 刘静安. 汽车用铝材的现状、发展趋势与重点研发方向[J]. 铝加工, 2007(5): 10-17.
Yin Xiaohui, Liu Jing'an. Current situation development trend and research direction of automotive materials[J]. Aluminum Fabrication, 2007(5): 10-17.
[6]马青梅, 李菁菁, 张国文, 等. 退火及冷却方式对5182铝合金屈服平台的影响[J]. 材料热处理学报, 2019, 40(9): 21-25.
Ma Qingmei, Li Jingjing, Zhang Guowen, et al. Effect of annealing and cooling rate on yield plateau of 5182 alloy[J]. Transactions of Materials and Heat Treatment, 2019, 40(9): 21-25.
[7]丁向群, 何国求, 陈成澍, 等. 6×××系汽车车身用铝合金的研究应用进展[J]. 材料科学与工程学报, 2005, 23(2): 302-305.
Ding Xiangqun, He Guoqiu, Chen Chengshu, et al. Advance in studies of 6000 aluminum alloy for automobile[J]. Journal of Materials Science and Engineering, 2005, 23(2): 302-305.
[8]杨猛. 一种铝镁硅板材热处理工艺及焊接性的研究[D]. 沈阳: 沈阳工业大学, 2013.
[9]马鸣图, 毕祥玉, 游江海, 等. 铝合金汽车板性能及其应用的研究进展[J]. 机械工程材料, 2010, 34(6): 1-5.
Ma Mingtu, Bi Xiangyu, You Jianghai, et al. Research progress of property and its application of aluminium alloy auto sheet[J]. Materials for Mechanical Engineering, 2010, 34(6): 1-5.
[10]Ratchev P, Verlinden B, Van H P, et al. Hot ductility of an Al-4wt.%Mg-0.5wt.%Cu alloy[J]. Material Science and Engineering A, 1997, 222(2): 189-196.
[11]王宇, 曹零勇, 李俊鹏, 等. 均匀化工艺对5182铝合金铸锭组织的影响[J]. 材料热处理学报, 2015, 36: 101-106.
Wang Yu, Cao Lingyong, Li Junpeng, et al. Effect of different homogenization processes on microstructure of 5182 aluminum alloy[J]. Transactions of Materials and Heat Treatment, 2015, 36: 101-106.
[12]马鹏程. 5×××系铝合金板材的组织和织构对其成形性和锯齿屈服行为的影响[D]. 北京: 北京科技大学, 2015.
[13]Choi I, Jin S, Kang S. Effects of microstructure and alloy contents on the Luders line formation in Al-Mg alloys[J]. Scripta Materialia, 1998, 38(6): 887-892.
[14]Onodera R, Nonomura M, Aramaki M. Stress drop, Luders strain and strain rate during serrated flow[J]. Journal of the Japan Institute of Metals, 2000, 64(12): 1162-1171.
[15]苑锡妮, 杨兵, 曾渝. 5×××系铝合金汽车板研究进展[J]. 轻合金加工技术, 2018, 46(6): 8-13.
Yuan Xini, Yang Bing, Zeng Yu. Research development of 5××× series Al alloy sheet for automotive[J]. Light Alloy Fabrication Technology, 2018, 46(6): 8-13.
[16]Hdong C, Sundwa J, Sukbong K. Effects of microstructure and alloy contents on the Lüders line formation in Al-Mg alloys [J]. Scripta Materialia, 1998, 38(6): 887-892.
[17]Reyne B, Manach P Y, Nicolas M. Macroscopic consequences of Piobert-Lüders and Portevin-Le Chatelier bands during tensile deformation in Al-Mg alloys[J]. Materials Science and Engineering A, 2019, 746: 187-196.
[18]黎凤, 许泽兵, 任月路, 等. 预拉伸对5182-O和5754-O铝合金屈服平台的影响[J]. 轻合金加工技术, 2020, 48(11): 26-31.
Li Feng, Xu Zebing, Ren Yuelu, et al. Influence of pre-stretching on yield platform of 5182-O and 5754-O aluminium alloys[J]. Light Alloy Fabrication Technology, 2020, 48(11): 26-31.
[19]姚金池, 陈立佳, 刘凯, 等. 不同热处理状态Al-3.5Mg-0.2Sc合金的动态应变时效应为[J]. 材料热处理学报, 2018, 39(7): 36-41.
Yao Jinchi, Chen Lijia, Liu Kai, et al. Dynamic strain aging behavior of Al-3.5Mg-0.2Sc alloy under different heat treatment states[J]. Transactions of Materials and Heat Treatment, 2018, 39(7): 36-41.
[20]曹高辉, 苑锡妮, 曹零勇. 5754-O铝合金吕德斯带表面缺陷解决方案的应用[J]. 宝钢技术, 2022, 7(3): 56-62.
Cao Gaohui, Yuan Xini, Cao Lingyong. Application of surface defect solution of 5754-O aluminum alloy Luders line[J]. Baosteel Technology, 2022, 7(3): 56-62.
[21]Hirosuke I, Toshio K. Yield point elongation in Al-Mg alloys[J]. Materials Science Forum, 2000, 331: 1303-1308.
[22]李小龙, 郭正洪, 戎咏华, 等. 基于屈服平台理论开发的600 MPa级高强塑性螺纹钢的研究[J]. 金属学报, 2014, 50(4): 439-446.
Li Xiaolong, Guo Zhenghong, Rong Yonghua, et al. 600 MPa grade rebar with ductility development based on theory of yield plateau[J]. Acta Metallurgica Sinica, 2014, 50(4): 439-446.
[23]Hirsch J. Aluminium alloys for automotive application[J]. Materials Science Forum, 1997, 242: 33-50.