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Title: Developing a novel high-strength Al–Mg–Zn–Si alloy for laser powder bed fusion
Authors: Yang, F
Wang, J
Wen, T
Zhang, L
Dong, X
Qiu, D
Yang, H
Ji, S
Keywords: aluminium alloys;microstructure;mechanical property;additive manufacturing;laser powder bed fusion
Issue Date: 21-Jul-2022
Publisher: Elsevier
Citation: Yang, F. et al. (2022) 'Developing a novel high-strength Al–Mg–Zn–Si alloy for laser powder bed fusion', Materials Science and Engineering A, 851, 143636, pp. 1 - 12. doi: 10.1016/j.msea.2022.143636.
Abstract: Additively manufactured (AM) aluminium alloys have attracted increasing attention due to the great demand of prototyping, spare parts supply, short run productions and further light-weighting of vehicles. However, most of the reported AM aluminium alloys are usually modified version of commercial cast or wrought aluminium alloys. In this work, we successfully developed a new high-strength and ductile Al5Mg3Zn2Si alloy, which is designed for laser powder bed fusion (LPBF) process. The optimized relative density of 98.9% was obtained at a volumetric energy density (VED) of 129.1 J/mm3. The as-LPBFed Al5Mg3Zn2Si alloy features refined equiaxed α-Al grains and Al–Mg2Si eutectic network. In addition, the sub-micrometre sized, coherent α-Al(Fe,Mn)Si and MgZn2 dispersoids in conjunction with high number density of (Mg,Zn)-rich GP zones co-contribution to the excellent combination of mechanical properties, i.e. the ultimate tensile strength of 548 MPa, the yield strength of 403 MPa, and the elongation of 6.7%. Such a high-strength and ductile AM aluminium alloys without any addition of costly alloying elements has a great potential for automotive and aerospace applications.
Description: Data availability: Data will be made available on request.
ISSN: 0921-5093
Other Identifiers: ORCID iDs: Xixi Dong; Dong Qiu; Hailin Yang; Shouxun Ji
Appears in Collections:Brunel Centre for Advanced Solidification Technology (BCAST)

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