Please use this identifier to cite or link to this item: http://bura.brunel.ac.uk/handle/2438/31673
Title: Processability improvement and strength enhancement in laser powder bed fusion of AlMgZr and AlMgZr-Ti alloys
Authors: Zhu, M
Wang, J
Wen, T
He, Z
Dong, X
Qiu, D
Ji, S
Wang, Y
Yang, H
Keywords: aluminium alloys;laser powder bed fusion;microstructure;strength enhancement;thermal stability
Issue Date: 4-Jul-2025
Publisher: Routledge (Taylor and Francis Group)
Citation: Zhu, M. et al. (2025) 'Processability improvement and strength enhancement in laser powder bed fusion of AlMgZr and AlMgZr-Ti alloys', Virtual and Physical Prototyping, 20 (1), e2523546, pp. 1 - 16. doi: 10.1080/17452759.2025.2523546.
Abstract: The Al3(Ti, Zr) phase, which exhibits a lower formation enthalpy, was incorporated to improve the processability and strength of AlMgZr alloys fabricated by laser powder bed fusion (PBF-LB). The results confirmed that the crack-free AlMgZr-Ti alloy exhibited a relative density of 99.7% and a fine grain size of ∼ 2.5 μm. The improved processability can be attributed to grain refinement and the columnar-to-equiaxed transition (CET), which is induced from promoted heterogeneous nucleation by in-situ Al3(Ti, Zr) phase and high grain growth restriction factor by segregation of Ti at the interface. During solidification, Al3Ti phase was precipitated initially and Zr was incorporated into the Al3Ti lattice in the subsequent precipitation, accelerating Zr precipitation from α-Al matrix. Through experimental results and calculations of formation enthalpy in combination, the Al3(Ti, Zr) phase was most likely to be Al3(Ti5/6, Zr1/6). Meanwhile, the AlMgZr-Ti alloy exhibited superior strength in comparison with the counterpart of AlMgZr alloy, where the enhancement of YS (408 MPa) and UTS (432 MPa) is 119% and 42.6%, respectively, with the UTS of the AlMgZr-Ti alloy maintaining 182 MPa at 300 °C.
Description: Data availability statement: Data are available from the corresponding author on reasonable request.
URI: https://bura.brunel.ac.uk/handle/2438/31673
DOI: https://doi.org/10.1080/17452759.2025.2523546
ISSN: 1745-2759
Other Identifiers: ORCiD: Xixi Dong https://orcid.org/0000-0002-3128-1760
ORCiD: Shouxun Ji https://orcid.org/0000-0002-8103-8638
ORCiD: Yun Wang https://orcid.org/0000-0003-2367-7666
Article number: e2523546
Appears in Collections:Brunel Centre for Advanced Solidification Technology (BCAST)

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