Microstructural Evaluation and Tensile Properties of Al-Mg-Sc-Zr Alloys Prepared by LPBF

doi:10.3390/cryst13060913

IMR OpenIR

	Microstructural Evaluation and Tensile Properties of Al-Mg-Sc-Zr Alloys Prepared by LPBF
	Lu, Yuxian 1,2; Zhang, Hao 1; Xue, Peng 1; Wu, Lihui 1; Liu, Fengchao 1; Jia, Luanluan 3; Ni, Dingrui 1; Xiao, Bolv 1; Ma, Zongyi 1
通讯作者	Zhang, Hao(haozhang@imr.ac.cn) ; Ni, Dingrui(drni@imr.ac.cn)
	2023-06-01
发表期刊	CRYSTALS
卷号	13 期号:6 页码:14
摘要	Laser powder bed fusion (LPBF) is a typical additive manufacturing technology that offers significant advantages in the production of complex components. With the rapid heating and cooling characteristics of LPBF, a large amount of solid solution of alloying elements in the matrix can be achieved to form supersaturated solid solutions, thus enhancing the properties of LPBF alloys. For the unique microstructure, the heat treatment process needs to be adjusted accordingly. In this work, a Zr/Sc-modified Al-Mg alloy processed by laser powder bed fusion (LPBF) with relatively low cost and good mechanical properties was investigated. The fine microstructure was obtained under rapid solidification conditions. The nanoscale Al-3(Sc,Zr) particles precipitated at the molten pool boundary during solidification. These particles, as effective heterogeneous nucleators, further refined the & alpha;-Al grains and improved the mechanical properties of the alloy. As a result, the alloy exhibited a heterogeneous microstructure consisting of columnar grains in the center of the molten pool and equiaxed grains at the boundaries. The rapid solidification resulted in the supersaturation of solute atoms in the & alpha;-Al matrix, which significantly enhanced the solid solution strengthening effect. With the LPBF processing parameters of a combination of a laser power of 250 W, a laser scanning speed of 833 mm/s, and stripe scanning mode, the tensile strength of the alloy reached 401.4 & PLUSMN; 5.7 MPa, which was significantly higher than that of the cast alloys with aging treatment (281.1 & PLUSMN; 1.3 MPa). The heat treatment promoted the formation of secondary Al-3(Sc,Zr), Mn/Mg-rich phases. The ultimate tensile strength and elongation at fracture after aging at 325 & DEG;C for 2 h were 536.0 & PLUSMN; 1.7 MPa and 14.8 & PLUSMN; 0.8%, respectively. The results provide insight into the preparation of aluminum alloys with relatively low cost and excellent mechanical properties.
关键词	additive manufacturing laser powder bed fusion Al-Mg-Sc-Zr alloy fine grain strengthening solution strengthening
资助者	National Key Research and Development Program of China ; National Natural Science Foundation of China ; Youth Innovation Promotion Association, CAS ; Bintech-IMR Ramp;D Program
DOI	10.3390/cryst13060913
收录类别	SCI
语种	英语
资助项目	National Key Research and Development Program of China[2022YFB3707400] ; National Natural Science Foundation of China[U21A2043] ; Youth Innovation Promotion Association, CAS[2022191] ; Bintech-IMR Ramp;D Program[GYY-JSBU-2022-010]
WOS研究方向	Crystallography ; Materials Science
WOS类目	Crystallography ; Materials Science, Multidisciplinary
WOS记录号	WOS:001017060500001
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/321006/178442
专题	中国科学院金属研究所
通讯作者	Zhang, Hao; Ni, Dingrui
作者单位	1.Chinese Acad Sci, Inst Met Res, Shi Changxu Innovat Ctr Adv Mat, Shenyang 110016, Peoples R China 2.Univ Sci & Technol China, Sch Mat Sci & Engn, Shenyang 110016, Peoples R China 3.Binzhou Inst Technol, Shandong Key Lab Adv Aluminum Mat & Technol, Weiqiao UCAS Sci & Technol Pk, Binzhou 256606, Peoples R China
推荐引用方式 GB/T 7714	Lu, Yuxian,Zhang, Hao,Xue, Peng,et al. Microstructural Evaluation and Tensile Properties of Al-Mg-Sc-Zr Alloys Prepared by LPBF[J]. CRYSTALS,2023,13(6):14.
APA	Lu, Yuxian.,Zhang, Hao.,Xue, Peng.,Wu, Lihui.,Liu, Fengchao.,...&Ma, Zongyi.(2023).Microstructural Evaluation and Tensile Properties of Al-Mg-Sc-Zr Alloys Prepared by LPBF.CRYSTALS,13(6),14.
MLA	Lu, Yuxian,et al."Microstructural Evaluation and Tensile Properties of Al-Mg-Sc-Zr Alloys Prepared by LPBF".CRYSTALS 13.6(2023):14.