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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. |
URI: | https://bura.brunel.ac.uk/handle/2438/25531 |
DOI: | https://doi.org/10.1016/j.msea.2022.143636 |
ISSN: | 0921-5093 |
Other Identifiers: | ORCID iDs: Xixi Dong https://orcid.org/0000-0002-3128-1760; Dong Qiu https://orcid.org/0000-0003-4978-2077; Hailin Yang https://orcid.org/0000-0003-3924-200X; Shouxun Ji https://orcid.org/0000-0002-8103-8638. 143636 |
Appears in Collections: | Brunel Centre for Advanced Solidification Technology (BCAST) |
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