Transactions of Materials and Heat Treatment

Title：Microstructure and properties of forged AE42 magnesium alloy for automotive radiator housing

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ClassificationCode：TH164

year,vol(issue):pagenumber：2025,50(8):48-54

Abstract：

In order to study the microstructure and properties of forged AE42 magnesium alloy for automotive radiator housing, take the homogenized AE42 magnesium alloy bars as the blanks to conduct the forging test, and the microstructure, room temperature mechanical properties, and room temperature corrosion resistance properties were compared with as-cast alloy specimens. The results show that forging significantly refines the microstructure of AE42 magnesium alloy, and improves the mechanical properties and corrosion resistance properties of the alloy. The tensile strength, yield strength and elongation after fracture of the alloy reach 223 MPa, 135 MPa and 11.6%, respectively. The tensile strength and yield strength are increased by 106 and 81 MPa respectively compared with those of the as-cast alloy. The elongation after fracture is slightly increased compared with that of the as-cast alloy. The corrosion potential of forged AE42 magnesium alloy for automotive radiator housing is -1.517 V, which shifts positively by 131 mV compared with that of the as-cast alloy.The research results proves that the forged AE42 magnesium alloy for automotive radiator housing has a fine and uniform internal structure, excellent mechanical properties and corrosion resistance properties.

Funds：

山西省高等学校科技创新项目（2023L544）

作者简介：王雷（1985-），女，硕士，讲师 E-mail：muweixian923@163.com

Reference：

[1]李旻昊,卢立伟,张家龙,等. 镁合金锻压-弯曲反复变形的有限元数值模拟分析与实验研究[J]. 锻压技术,2023,48(2):52-61.

Li M H, Lu L W, Zhang J L, et al. Finite element numerical simulation analysis and experimental research on forging-bending repeated deformation for magnesium alloys [J]. Forging & Stamping Technology, 2023, 48(2): 52-61.

[2]肖振宇,杨溢,袁星宇,等. 分步锻压工艺对AZ91镁合金组织演化及力学性能的影响[J]. 中国有色金属学报,2018,28(11):2173-2181.

Xiao Z Y, Yang Y, Yuan X Y, et al. Effects of interrupted forging on microstructural development and mechanical properties of cast AZ91 Mg alloy [J]. The Chinese Journal of Nonferrous Metals, 2018, 28(11): 2173-2181.

[3]蒋莉萍,王军,肖振宇,等. 室温多向锻压AZ31镁合金的静态再结晶行为[J]. 中国有色金属学报,2015, 25(11):3051-3059.

Jiang L P, Wang J, Xiao Z Y, et al. Static recrystallization behavior of multi-directionally forged AZ31 magnesium alloy at room temperature [J]. The Chinese Journal of Nonferrous Metals, 2015, 25(11): 3051-3059.

[4]赵文祥,王西彬,龙震海,等. 锻压镁合金材料端面高速铣削过程中切削力特征规律分析[J]. 兵工学报,2005,26(4):540-544.

Zhao W X, Wang X B, Long Z H, et al. Factorial study on characteristics of magnesium alloy in high-speed face-milling process [J]. Acta Armamentarii, 2005, 26(4): 540-544.

[5]詹磊,何生平,郝海. 锻压轮毂用6061铝合金圆铸棒中心裂纹分析及改进[J]. 轻金属,2023(11):44-48.

Zhan L, He S P, Hao H. Analysis and improvement of center crack of 6061 aluminum alloy billet for forged hubs [J]. Light Metals, 2023(11): 44-48.

[6]孙忠玉,赵越顺. 分步锻压对汽车用AZ80镁合金耐蚀及耐磨性能的影响[J]. 锻压技术,2023,48(1):23-28.

Sun Z Y, Zhao Y S. Effect of step forging on corrosion resistance and wear resistance properties of AZ80 magnesium alloy for automobile [J]. Forging & Stamping Technology, 2023, 48(1): 23-28.

[7]陈刚,刘春铮,陈杰,等. 喷射沉积颗粒梯度增强铝合金活塞的锻压工艺[J]. 湖南大学学报（自然科学版）,2017,44(6):19-24.

Chen G, Liu C Z, Chen J, et al. Forging process of particle gradient reinforced Al-Si alloy piston by spray deposition [J]. Journal of Hunan University (Natural Sciences), 2017, 44(6): 19-24.

[8]苗广辉,韩开生,田宁. 点式锻压激光快速成形TC4钛合金叶片的组织与性能研究[J]. 热加工工艺,2023,52(23):92-95,99.

Miao G H, Han K S, Tian N. Study on microstructure and properties of TC4 titanium alloy blade formed by spot forging laser rapid prototyping [J]. Hot Working Technology, 2023, 52(23): 92-95,99.

[9]祝叶,李爱. 锻压应力对铸锻复合成形加Cr的6061铝合金性能的影响[J]. 轻合金加工技术,2021,49(2):30-34.

Zhu Y, Li A. Effect of forging stress on properties of 6061 aluminum alloy with added Cr in cast-forging composite forming [J]. Light Alloy Fabrication Technology, 2021, 49(2): 30-34.

[10]郭俊成,肖振宇,杨续跃. 两步锻压提升铸态AZ80镁合金延伸率的研究[J]. 矿冶工程,2018,38(4):144-148.

Guo J C, Xiao Z Y, Yang X Y. Enhancement of ductility for cast AZ80 Mg alloy by a two-step forging process [J]. Mining and Metallurgical Engineering, 2018, 38(4): 144-148.

[11]Arora H S, Singh H, Dhindaw B K. Corrosion behavior of a Mg alloy AE42 subjected to friction stir processing[J]. Corrosion: The Journal of Science and Engineering, 2013, 69(2): 122-135.

[12]Deua F, Ravindran C, Rao K P. Evaluation of hot cracking in AZ91E and AE42 magnesium alloys[J]. Canadian Metallurgical Quarterly, 2012, 51(3): 346-355.

[13]陈燕飞. 高丰度稀土元素Ce和Y对镁合金的强化机制研究[D]. 南昌:南昌大学,2023.

Chen Y F. Study on the Strengthening Mechanism of High Abundance Rare-earth Elements Ce and Y in Magnesium Alloys[D]. Nanchang: Nanchang University, 2023.

[14]李谦,周国治. 稀土镁合金中关键相及其界面与性能的相关性[J]. 中国有色金属学报,2019,29(9):1934-1952.

Li Q, Zhou G Z. Relationships between key phases and their interfaces with properties in rare earth-magnesium alloys[J]. The Chinese Journal of Nonferrous Metals, 2019, 29(9): 1934-1952.

[15]李小强,马国俊,殷俊,等. 稀土元素对镁合金力学行为影响的研究现状[J]. 材料导报,2017,31(21):82-89.

Li X Q, Ma G J, Yin J, et al. Rare earth alloying: Toward high mechanical properties for magnesium alloys [J]. Materials Reports, 2017, 31(21): 82-89.

[16]柯静,郭林通. 析出相对稀土镁合金腐蚀行为的影响[J]. 中国材料进展,2024,43(4):336-343.

Ke J, Guo L T. Effect of precipitates on corrosion behavior of rare earth magnesium alloys [J]. Materials China, 2024, 43(4): 336-343.

[17]刘夏琳. 稀土微合金化铝/镁合金阳极材料的腐蚀行为和电化学特性[D]. 洛阳:河南科技大学,2023.

Liu X L. Corrosion Behavior and Electrochemical Characteristics of Rare Earth Micro-alloyed Aluminum/Magnesium Alloy Anode Materials[D]. Luoyang: Henan University of Science and Technology, 2023.

[18]王熠玮. ME镁合金的腐蚀性能及稀土作用研究[D]. 呼和浩特:内蒙古工业大学,2022.

Wang Y W. Study on the Corrosion Performance of ME Magnesium Alloy and the Role of Rare Earths[D]. Hohhot: Inner Mongolia University of Technology, 2022.

[19]袁星宇,肖振宇,杨溢,等. AZ91镁合金在高温变速两步锻压中的微观组织演化[J]. 热加工工艺,2016,45(11):64-67.

Yuan X Y, Xiao Z Y, Yang Y, et al. Microstructure evolution of AZ91 magnesium alloy in variable speed two-step forging at high temperature [J]. Hot Working Technology, 2016, 45(11): 64-67.

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