Growth kinetics of intermetallic compounds at interface of 4343/AZ31B/4343 alloy laminate

doi:10.13251/j.issn.0254-6051.2025.05.013

Abstract

Abstract: In order to solve the problem of intermetallic compounds produced during diffusion annealing of 4343/AZ31B/4343 alloy laminate, the growth kinetics of intermetallic compounds at the interface of 4343/AZ31B/4343 alloy laminate was studied with 1060/AZ31B/1060 alloy laminate as the control group. Two kinds of laminates were diffusion annealed between 200-400 ℃ for 0.5-3.0 h, respectively. The thickness of intermetallic compound layers at different diffusion annealing temperatures and time was obtained through BSE characteristic and EDS line scanning of the Mg-Al interface. The diffusion kinetics equation was derived, and the growth kinetics models of intermetallic compounds for two kinds of laminates were established based on the obtained thickness of the intermetallic compounds. Comparing the model calculated values with the actual results, it can be seen that the model can simulate the growth of intermetallic compounds during the actual diffusion annealing process, and provide a theoretical basis for the heat treatment of laminates. In addition, in the annealing experiment at 250 ℃ for 0.5 h, there is no intermetallic compound in the 4343/AZ31B/4343 alloy laminate, while 1060/AZ31B/1060 alloy laminate shows a layer of intermetallic compounds with uniform thickness, showing that 1060/AZ31B/1060 alloy laminate is more prone to the precipitation of intermetallic compounds at 250 ℃. During the diffusion annealing process at higher temperatures, both laminates produce two types of intermetallic compounds, with Al₃Mg₂ on the Al side and Mg₁₇Al₁₂ on the Mg side.

Key words: magnesium aluminum alloy laminate, annealing treatment, intermetallic compounds, growth dynamics

CLC Number:

TG146.22

Liu Hongjie, Li Chen, Wu Xinyuan, Liang Wei. Growth kinetics of intermetallic compounds at interface of 4343/AZ31B/4343 alloy laminate[J]. Heat Treatment of Metals, 2025, 50(5): 79-85.

References

[1] 中国公路学报编辑部. 中国汽车工程学术研究综述·2023[J]. 中国公路学报, 2023, 36(11): 1-192.
Editorial Department of China Journal of Highway and Transport. Review on China's automotive engineering research progress: 2023[J]. China Journal of Highway and Transport, 2023, 36(11): 1-192.
[2] Aghion E, Bronfin B, Friedrich H, et al. The environmental impact of new magnesium alloys on the transportation industry[C]//Minerals, Metals and Materials and Society. Magnesium Technology 2004. Charlotte, NC, 2004: 167-172.
[3] Myers P S. Reducing transportation fuel consumption: How far should we go[J]. Proceedings-Society of Automotive Engineers, 1992, 10: 225-234.
[4] Mordike B L, Ebert T. Magnesium properties applications potential[J]. Materials Science and Engineering A, 2001, 302(1): 37-45.
[5] 曾荣昌, 柯伟, 徐永波, 等. Mg合金的最新发展及应用前景[J]. 金属学报, 2001, 37(7): 673-685.
Zeng Rongchang, Ke Wei, Xu Yongbo, et al. Recent development and application of magnesium alloys[J]. Acta Metallurgica Sinica, 2001, 37(7): 673-685.
[6] Cole G S. Issues that influence magnesium's use in the automotive industry[J]. Material Science Forum, 2003, 419-422: 43-50.
[7] 刘正, 张奎, 曾小勤. 镁基轻质合计理论基础及其应用[M]. 北京: 机械工业出版社, 2002.
[8] Bian Liping, Liang Wei, Xie Guoyin, et al. Enhanced ductility in an Al-Mg₂Si in situ composite processed by ECAP using a modified B_C route[J]. Materials Science and Engineering A, 2011, 528(9): 3463-3467.
[9] 聂慧慧. Al/Mg/Al层合板的微观组织结构和热变形行为[D]. 太原: 太原理工大学, 2017.
Nie Huihui. The microstructures and thermal deformation behavior of Al/Mg/Al clad sheets[D]. Taiyuan:Taiyuan University of Technology, 2017.
[10] 刘珂. AZ91镁合金挤压异构组织调控与力学性能研究[D]. 重庆: 重庆大学, 2021.
Liu Ke. Study on heterogeneous structure control and mechanical properties of AZ91 extruded magnesium alloys[D]. Chongqing: Chongqing University, 2021.
[11] 原志鹏. 复合铝板钎焊过程中固液交互作用及对组织和腐蚀性能的影响[D]. 南京: 东南大学, 2021.
Yuan Zhipeng. The effect of solid-liquid interaction on microstructure and corrosion property of brazing sheet during brazing[D]. Nanjing: Southeast University, 2021.
[12] 饶文姬, 魏守征, 李志勇, 等. AZ31B/5A06脉冲熔化极氩弧焊焊缝组织特性[J]. 热加工工艺, 2019, 48(21): 26-30.
Rao Wenji, Wei Shouzheng, Li Zhiyong, et al. Microstructures of weld seam during pulsed metal inert-gas welding of AZ31B and 5A06 dissimilar alloys[J]. Hot Working Technology, 2019, 48(21): 26-30.
[13] 曹学成. 轧制覆铝镁板界面的结构演化与强度研究[D]. 上海: 上海应用技术大学, 2020.
Cao Xuecheng. The structure evolution and interface strength of rolled Al/Mg/Al three-layer clad sheet[D]. Shanghai: Shanghai Institute of Technology, 2020.
[14] 赵博文, 周存龙, 赵广辉, 等. 轧制工艺制备镁铝层合板的研究现状[J]. 重型机械, 2020(5): 1-8.
Zhao Bowen, Zhou Cunlong, Zhao Guanghui, et al. Research status of Mg-Al laminate prepared by rolling process[J]. Heavy Machinery, 2020(5): 1-8.
[15] 罗长增. 两道次热轧Al/Mg/Al复合板的界面微观结构演变及其对复合板力学性能的影响[D]. 太原: 太原理工大学, 2013.
Luo Changzeng. Interfacial microstructure evolution of Al/Mg/Al laminates fabricated by two-pass hot rolling and influences of that on mechanical properties[D]. Taiyuan: Taiyuan University of Technology, 2013.