轨交用Mg-9Al-0.1Mn-<i>x</i>Ca挤压合金的组织与力学性能研究

doi:10.11896/cldb.24070127

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Abstract Magnesium alloys have become one of the most promising structural materials due to their superiority characteristics such as low density, high specific strength and stiffness, high thermal conductivity, high damping and good electromagnetic shielding performance. Mg-Al-Mn-Ca alloys have enormous development potential in the rail transportation owing to their excellent mechanical properties, formability, and flame retardancy. However, current researches on Mg-Al-Mn-Ca alloys mainly focus on micro-alloying or low Al composition alloys. For this reason, this work investigated the effect of Ca element on the microstructure and mechanical properties of high Al composition alloys. According to the results of optical microscopy (OM), X-ray diffractometer (XRD), scanning electron microscope (SEM), electron backscatter diffraction (EBSD) and mechanical properties testing, the addition of Ca element can effectively refine the grain size and weaken the basal texture. In addition, the strength and plasticity of the alloy are also synchronously improved. When the Ca content is 0.5wt%, the alloy exhibits the best comprehensive mechanical properties, with tensile yield strength, ultimate tensile strength, compressive yield strength, and elongation of 234 MPa, 343 MPa, 203 MPa, and 14.9%, respectively.

Key words： Mg-Al-Mn-Ca alloys microstructure mechanical property rail transportation

Published: 25 September 2025 Online: 2025-09-11

CLC number:

TG379

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	Articles by authors
	JING Xuerui
	WU Xiong
	WANG Senwei
	XIAO Hui
	SHE Jia
	TANG Aitao
	WANG Jingfeng

Cite this article:

JING Xuerui,WU Xiong,WANG Senwei, et al. Study on the Microstructure and Mechanical Properties of As-extruded Mg-9Al-0.1Mn-xCa Alloys for Rail Transit[J]. Materials Reports, 2025, 39(18): 24070127-6.

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https://www.mater-rep.com/EN/10.11896/cldb.24070127 OR https://www.mater-rep.com/EN/Y2025/V39/I18/24070127

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