Effect of stabilizing annealing on microstructure and properties of a new 5××× aluminum alloy

doi:10.13251/j.issn.0254-6051.2024.04.028

Abstract

Abstract: Effect of stabilizing annealing temperature and time on microstructure and properties of a new 5××× aluminum alloy was investigated by means of SEM, EBSD, TEM, intergranular corrosion mass loss test and tensile properties test. The results show that the static recrystallization of the 5××× aluminum alloy is gradually completed with the increase of stabilizing annealing temperature, showing a dominant role of {001}<100> texture component. The various stabilizing annealing treatments have no significant effect on the tensile properties of the aluminum alloy at room temperature. When the annealing temperature is located within the range of 200-260 ℃, the precipitation and spheroidization of β phase on the grain boundary can be accelerated after holding for 20 min. The continuous distribution of precipitation network seriously deteriorates the intergranular corrosion resistance of the aluminum alloy. In contrast, the mass loss of intergranular corrosion can meet the ASTM G67 requirement of less than 15 mg/cm² when the stablizing annealing treatment is performed at 270-300 ℃ for 10-60 min. Thus, the optimum stabilization treatment for the aluminum alloy is annealing at 270-300 ℃ and holding for 10-60 min.

Key words: 5××× aluminum alloy, stabilization treatment, precipitation, intergranular corrosion, microstructure and properties

CLC Number:

TG146.2

Sun Jinbao, Wang Shaohua, Liu Hui, Li Guoai, Wang Hailong, Zhang Jingliang, Zhou Zhiyu. Effect of stabilizing annealing on microstructure and properties of a new 5××× aluminum alloy[J]. Heat Treatment of Metals, 2024, 49(4): 175-182.

References

[1]杨志成, 田志强, 孔小东. 船用Al-Mn-Mg合金的耐蚀性能比较[J]. 兵工自动化, 2014, 33(6): 40-42.
Yang Zhicheng, Tian Zhiqiang, Kong Xiaodong. Comparison of corrosion resistance of Al-Mn-Mg aluminum alloy used for boat[J]. Ordnance Industry Automation, 2014, 33(6): 40-42.
[2]Fayomi I S O, Abdulwah M, Popoola I P A, et al. Corrosion resistance of AA6063-type Al-Mg-Si alloy by silicon carbide in sodium chloride solution for marine application[J]. Journal of Marine Science and Application, 2015, 14(4): 459-462.
[3]朱希一, 何建贤, 赵启忠, 等. 退火温度对船用Al-Mg-Mn-Cr合金组织和性能的影响[J]. 金属热处理, 2020, 45(5): 133-137.
Zhu Xiyi, He Jianxian, Zhao Qizhong, et al. Effect of annealing temperature on microstructure and properties of marine Al-Mg-Mn-Cr alloy[J]. Heat Treatment of Metals, 2020, 45(5): 133-137.
[4]方剑, 黄彦, 喻国铭, 等. 冷变形对Al-Mg-Si-Zr耐热铝合金性能及静态再结晶的影响[J]. 金属热处理, 2019, 44(8): 37-40.
Fang Jiag, Huang Yan, Yu Guoming, et al. Influence of cold deformation on properties and static recrystallization of Al-Mg-Si-Zr heat-resistant aluminum alloy[J]. Heat Treatment of Metals, 2019, 44(8): 37-40.
[5]Jang D H, Park Y B, Kim W J. Significant strengthening in superlight Al-Mg alloy with an exceptionally large amount of Mg (13wt%) after cold rolling[J]. Materials Science and Engineering A, 2019, 744: 36-44.
[6]齐忠原, 巫瑞智, 王国军, 等. 铝合金在船舶和海洋工程中的应用[J]. 轻合金加工技术, 2016, 44(1): 12-18.
Qi Zhongyuan, Wu Ruizhi, Wang Guojun, et al. Application of aluminum alloys in shipping and ocean engineering[J]. Light Alloy Fabrication Technology, 2016, 44(1): 12-18.
[7]Li X, Liu Y, Zhou Z. Grain refinement and performance enhancement of laser powder bed fusion in-situ processed Al-Mg alloy modified by ScH3 and ZrH2[J]. Materials Characterization, 2022, 190: 112068.[8]Li Z, Yan H, Chen J, et al. Enhancing damping capacity and mechanical properties of Al-Mg alloy by high strain rate hot rolling and subsequent cold rolling[J]. Journal of Alloys and Compounds, 2022, 908: 164677.
[9]Galvele J R, De Micheli S M. Mechanism of intergranular corrosion of Al-Cu alloys[J]. Corrosion Science, 1970, 10(11): 795-807.
[10]Beura V K, Kale C, Srinivasan S, et al. Corrosion behavior of a dynamically deformed Al-Mg alloy[J]. Electrochimica Acta, 2020, 354: 136695.
[11]Choi K H, Kim B H, Lee D B, et al. Effect of combined extrusion and rolling parameters on mechanical and corrosion properties of new high strength Al-Mg alloy[J]. Metals, 2021, 11: 445.
[12]Yang X, Chen H, Zhu Z, et al. Stress corrosion behavior of narrow-gap rotating laser welding of thick Al-Mg alloy joint[J]. International Journal of Modern Physics B, 2019, 34: 2040062.
[13]Yassar R S, Field D P, Weiland H. The effect of predeformation on the β″ and β′ precipitates and the role of Q′ phase in an Al-Mg-Si alloy AA6022[J]. Scripta Materialia, 2005, 53: 299-303.
[14]彭勇宜, 尹志民. Sc与Zr对Al-Mg-Mn合金力学性能和剥落腐蚀性能的影响[J]. 中国稀土学报, 2006, 24(2): 217-222.
Peng Yongyi, Yin Zhimin. Effect of Sc and Zr on mechanical and exfoliation corrosion properties of Al-Mg-Mn alloys[J]. Journal of the Chinese Society of Rare Earths, 2006, 24(2): 217-222.
[15]Popovic M, Romhanji E. Stress corrosion cracking susceptibility of Al-Mg alloy sheet with high Mg content[J]. Journal of Materials Processing Technology, 2002, 125-126: 275-280.
[16]张鑫明, 聂祚仁, 黄晖, 等. 冷变形及退火对5E06铝板晶间腐蚀性能的影响[J]. 中国有色金属学报, 2013, 23(11): 3056-3063.
Zhang Xinming, Nie Zuoren, Huang Hui, et al. Effect of cold deformation and annealing on intergranular corrosion property of 5E06 aluminium alloy plates[J]. The Chinese Journal of Nonferrous Metals, 2013, 23(11): 3056-3063.