Microstructure and hot deformation behavior of Al-Mg-Mn alloy after homogenization

doi:10.13251/j.issn.0254-6051.2022.11.005

Abstract

Abstract: Microstructure evolution of Al-Mg-Mn alloy prepared by the direct chill casting was studied during the homogenization process. The plastic deformation behavior of the alloy at high temperature was investigated by using Gleeble-1500 thermal simulation testing machine. The relationship between flow stress and deformation temperature, deformation amount of the alloy was analyzed, and the microstructure change of the alloy during deformation was also discussed. The results show that after homogenization, coarse non-equilibrium precipitates of the as-cast alloy gradually dissolve and decrease in the amount, and become fine, break, tend to spheroidize, appear as bead chains. During the thermal simulating deformation process, the flow stress of the alloy homogenization annealed at 475 ℃ for 15 h decreases with the increase of deformation temperature, and the peak value of the flow stress increases with the increase of deformation amount. As the deformation temperature rises, the hot deformed microstructure firstly recovers slowly, the dislocation density decreases, then forms sub-grains and microstructure with recrystallized grain characteristics.

Key words: Al-Mg-Mn alloy, homogenization annealing, microstructure, hot deformation

CLC Number:

TG146.2

Ma Baoxia, Qiao Yang, Mao Mingxuan, Sun Jianghui, Wu Changtong, Liu Zeyu. Microstructure and hot deformation behavior of Al-Mg-Mn alloy after homogenization[J]. Heat Treatment of Metals, 2022, 47(11): 32-38.

References

[1]Parker B A, Zhou Z F, Nolle P. The effect of small additions of scandium on the properties of aluminum alloys[J]. Journal of Materials Science, 1995, 30: 452-458.
[2]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.
[3]王旭东, 陈龙飞. 热轧Al-Mg-Mn-Er-Zr合金板材的低温冲击性能[J]. 金属热处理, 2014, 39(12): 76-79.
Wang Xudong, Chen Longfei. Impact properties of Al-Mg-Mn-Er-Zr alloy at cryogenic temperature[J]. Heat Treatment of Metals, 2014, 39(12): 76-79.
[4]Popovic M, Romhanji E. Characterization of microstructural changes in an Al-6.8wt.%Mg alloy by electrical resistivity measurements[J]. Materials Science & Engineering A, 2008, 492: 460-467.
[5]García-Bernal M A, Mishra R S, Verma R, et al. Hot deformation behavior of friction-stir processed strip-cast 5083 aluminum alloys with different Mn contents[J]. Materials Science and Engineering A, 2012, 534: 186-192.
[6]Mondal C, Mukhopadhyay A K. On the nature of T(Al₂Mg₃Zn₃) and S(Al₂CuMg) phases present in as-cast and annealed 7055 aluminum alloy[J]. Materials Science and Engineering A, 2005, 391(1/2): 367-376.
[7]邱楚, 郭世杰, 纪艳丽. 6061 铝合金均匀化过程中 AlMnSi 弥散颗粒的析出尺寸对再结晶行为的影响[J]. 金属热处理, 2020, 45(8): 27-33.
Qiu Chu, Guo Shijie, Ji Yanli. Effect of AlMnSi dispersion particle size on recrystallization of 6061 aluminum alloy during homogenization[J]. Heat Treatment of Metals, 2020, 45(8): 27-33.
[8]Rokhlin L L, Dobatkina T V, Bochvar N R, et al. Investigation of phase equilibria in alloys of the Al-Zn-Mg-Cu-Zr-Sc system[J]. Journal of Alloys and Compounds, 2004, 367(1/2): 10-16.
[9]Morere B, Shahani R, Maurice C, et al. The influence of Al₃Zr dispersoids on the recrystallization of hot-deformed AA 7010 alloys[J]. Metallurgical and Materials Transactions A, 2001, 32(3): 625-632.
[10]孙景旺, 王渠东, 丁文江. 铸造Al-Mg-Mn合金的显微组织及力学性能[J]. 特种铸造及有色合金, 2012, 32(1): 85-89.
Sun Jingwang, Wang Qudong, Ding Wenjiang. Microstructure and tensile properties of Al-Mg-Mn alloy[J]. Special Casting and Nonferrous Alloys, 2012, 32(1): 85-89.
[11]Engler O, Liu Z, Kuhnke K. Impact of homogenization on particles in the Al-Mg-Mn alloy AA 5454-Experiment and simulation[J]. Journal of Alloys and Compounds, 2013, 560: 111-122.
[12]Mathew E V, Ramachandran T R, Gupta K P, et al. Homogenization of commercial Al-Mn alloys[J]. Journal of Materials Science Letters, 1984, 3(7): 605-610.
[13]Eivani A R, Ahmed H, Zhou J, et al. Evolution of grain boundary phases during the homogenization of AA7020 aluminum alloy[J]. Metallurgical and Materials Transactions A, 2009, 40(3): 717-728.
[14]Goswami R, Spanos G, Pao P S, et al. Precipitation behavior of the phase in Al-5083[J]. Materials Science and Engineering A, 2010, 527(4/5): 1089-1095.

[1]	Gao Xing, Zhang Ning, Ding Yan, Jiang Bo. Effect of heat treatment time on microstructure and mechanical properties of TC4 titanium alloy fabricated by selective laser melting [J]. Heat Treatment of Metals, 2022, 47(9): 12-17.
[2]	Xia Pengzhao, Xu Ying, Cai Yanqing, Zhao Sitan, Lou Bingjie. Effect of microwave sintering process on microstructure and properties of Ti-Mg composites [J]. Heat Treatment of Metals, 2022, 47(9): 18-26.
[3]	Lin Lingfeng, Yuan Gecheng, Yang Lian, Ding Canpei. Effect of average pass reduction on microstructure of asynchronous rolled-solution treated 6016 aluminum alloy sheet [J]. Heat Treatment of Metals, 2022, 47(9): 36-40.
[4]	Wang Lu, Wang Feng, Zhang Mingwei, Liu Rui, Fu Zhengyuan, Liu Jingshun. Effect of annealing process on microstructure and corrosion resistance of Ti-4Al-2V alloy [J]. Heat Treatment of Metals, 2022, 47(9): 41-46.
[5]	Pan Ran, Liu Baosheng, Zeng Yuansong, Qu Haitao, Wang Dong, Mu Yanhong. Effect of cryogenic treatment on microstructure and mechanical properties of 15%SiC_p/2009 aluminum matrix composite [J]. Heat Treatment of Metals, 2022, 47(9): 65-70.
[6]	Zhang Haoze, Wang Junsheng, Gong Penghui, Zhan Haiyi, Wang Kai. Effect of heat treatment on microstructure and mechanical properties of TC4 alloy plate directly rolled by EB ingot [J]. Heat Treatment of Metals, 2022, 47(9): 71-78.
[7]	Zhong Liwei, Feng Zhaohui, Gao Wenli, Chen Junzhou, Lu Zheng. Effects of multi-axial forging and T852 heat treatment on microstructure and mechanical properties of Al-Cu-Li alloy [J]. Heat Treatment of Metals, 2022, 47(9): 79-86.
[8]	Ji Dejing, Yang Weiyu, Bai Yaqiong. Optimization of quenching process of high strength and toughness Q690D steel for construction machines [J]. Heat Treatment of Metals, 2022, 47(9): 108-112.
[9]	Wen Fangming, Hao Xiaobo, Cao Heng, Zhang Qiang, Li Bobo, Liu Yinqi. Effect of heat treatment process on microstructure and mechanical properties of N06600 alloy hot rolled plate [J]. Heat Treatment of Metals, 2022, 47(9): 113-118.
[10]	Ai Bingquan, Kuang Shuang, Tian Xiugang, Yang Feng, Wang Yuhui, Lu Zhiqiang, Wang Zhao, Hao Lei. Effect of soaking temperature on microstructure and properties of 980 MPa grade high strength steel with different chemical composition [J]. Heat Treatment of Metals, 2022, 47(9): 119-124.
[11]	Wang Shikai, Wang Rui, Kang Yan, Yu Zhiqiang, Yan Zhijie. Effect of quenching temperature on microstructure and properties of Cr5MoVNi steel [J]. Heat Treatment of Metals, 2022, 47(9): 125-129.
[12]	Xiong Weiliang, Liang Wen, Wu Teng, Liang Liang, Wu Haohong. Effect of controlled cooling process on microstructure and mechanical properties of hot-rolled dual phase steel [J]. Heat Treatment of Metals, 2022, 47(9): 130-133.
[13]	Fan Zhao, Cheng Zonghui, Zhang Zhiqiang. Effect of laser heat input on microstructure and mechanical properties of 1Cr17Ni2 stainless steel repaired by laser additive [J]. Heat Treatment of Metals, 2022, 47(9): 140-145.
[14]	Wang Ruimin, Liu Man, Zhou Jianhua, Zhang Qi, Su Xue, Xu Guang. Continuous cooling transformation curve of R350HT rail steel [J]. Heat Treatment of Metals, 2022, 47(9): 153-157.
[15]	Li Jing, Liu Chen, Yang Yuehui, Yuan Shaoqiang, Ai Chenguang. Continuous cooling transformation behavior of high-strength Q690D heavy steel plate [J]. Heat Treatment of Metals, 2022, 47(9): 171-174.