Enhancing the Strength and Toughness of A356.2-0.15Fe Aluminum Alloy by Trace Mn and Mg Co-Addition

doi:10.3390/met13081451

IMR OpenIR

	Enhancing the Strength and Toughness of A356.2-0.15Fe Aluminum Alloy by Trace Mn and Mg Co-Addition
	Cui, Jie 1,2; Chen, Jiayan 2,3; Li, Yongbo 1; Luo, Tianjiao 2
通讯作者	Luo, Tianjiao(tjluo@imr.ac.cn)
	2023-08-01
发表期刊	METALS
卷号	13 期号:8 页码:12
摘要	In the present work, microalloying is put forward to improve the microstructure and tensile properties of A356.2-0.15Fe (wt.%) alloy by the co-addition of trace Mn and Mg. A suitable Mn/Fe mass ratio of 0.5 is obtained for alloys with 0.15Fe. The yield strength, ultimate tensile strength, and elongation of the A356.2-0.15Fe alloy with an Mn/Fe ratio of 0.5 and containing 0.42 wt.% Mg is 179 MPa, 286 MPa, and 9.1%, respectively, which is acceptable for automotive wheel hub applications. Optical microscopy (OM), scanning electron microscopy (SEM), transmission electron microscopy (TEM), X-ray diffraction (XRD), and electron-probe microanalyzer (EPMA) methods are used to characterize the microstructure of the alloys. The results indicate that Mn addition promotes the transformation of the acicular beta-Al5FeSi phase to the block-shaped alpha-Al(Fe, Mn)Si phase. The ratio of length/width of the Fe-rich phase in the alloy is reduced by 78.8% with an Mn/Fe ratio of 0.5 and containing 0.35 wt.% Mg, compared with that of the alloy without Mn addition and containing 0.35 wt.% Mg. The addition of Mg reduces the secondary dendrite arm spacing (SDAS) from 26.1 mu m to 20.9 mu m. The volume fraction of the precipitated Mg2Si phase in the alloy containing 0.42 wt.% Mg increases by 60% compared with that in the alloy containing 0.35 wt.% Mg. The morphology transformation of the Fe-rich phase, the reduction of SDAS, and the increase in volume fraction of precipitated Mg2Si phase comprehensively contribute to the improvement of A356.2-0.15Fe alloy. The microstructure evolution mechanism and the effect of microstructure on tensile properties are analyzed and discussed.
关键词	A356.2 alloy microalloying Mn Mg microstructure tensile properties
资助者	Science and Technology Program of Dezhou ; Scientific Research Allowance of Dezhou University
DOI	10.3390/met13081451
收录类别	SCI
语种	英语
资助项目	Science and Technology Program of Dezhou[2022dzkj077] ; Scientific Research Allowance of Dezhou University[2022xjrc103]
WOS研究方向	Materials Science ; Metallurgy & Metallurgical Engineering
WOS类目	Materials Science, Multidisciplinary ; Metallurgy & Metallurgical Engineering
WOS记录号	WOS:001056995700001
出版者	MDPI
引用统计	被引频次：3[WOS] [WOS记录] [WOS相关记录]
文献类型	期刊论文
条目标识符	http://ir.imr.ac.cn/handle/321006/179136
专题	中国科学院金属研究所
通讯作者	Luo, Tianjiao
作者单位	1.Dezhou Univ, Sch Energy & Mech Engn, Dezhou 253023, Peoples R China 2.Chinese Acad Sci, Inst Met Res, Shenyang 110016, Peoples R China 3.Univ Sci & Technol China, Sch Mat Sci & Engn, Shenyang 110016, Peoples R China
推荐引用方式 GB/T 7714	Cui, Jie,Chen, Jiayan,Li, Yongbo,et al. Enhancing the Strength and Toughness of A356.2-0.15Fe Aluminum Alloy by Trace Mn and Mg Co-Addition[J]. METALS,2023,13(8):12.
APA	Cui, Jie,Chen, Jiayan,Li, Yongbo,&Luo, Tianjiao.(2023).Enhancing the Strength and Toughness of A356.2-0.15Fe Aluminum Alloy by Trace Mn and Mg Co-Addition.METALS,13(8),12.
MLA	Cui, Jie,et al."Enhancing the Strength and Toughness of A356.2-0.15Fe Aluminum Alloy by Trace Mn and Mg Co-Addition".METALS 13.8(2023):12.