Microstructure and mechanical properties of Zr modified Al-Si-Mg alloy produced by selective laser melting

doi:10.12442/j.issn.1002-185X.20220081

Home > Archive>Volume 52, Issue 3, 2023 >1087-1093. DOI:10.12442/j.issn.1002-185X.20220081

Microstructure and mechanical properties of Zr modified Al-Si-Mg alloy produced by selective laser melting
DOI:
                        10.12442/j.issn.1002-185X.20220081
                    
Author:
                        Lu Hongwei1Lu Hongwei
Jiangsu University of Science and Technology,Zhen’jiang
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Zhang Zhijie1Zhang Zhijie
Jiangsu University of Science and Technology,Zhen’jiang
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Luo Jinjie2Luo Jinjie
Kunshan Guoli Vacuum Electric Co.,Ltd.
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Geng Yaoxiang1Geng Yaoxiang
Jiangsu University of Science and Technology,Zhen’jiang
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Ju Hongbo1Ju Hongbo
Jiangsu University of Science and Technology,Zhen’jiang
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Xu Junhua1Xu Junhua
Jiangsu University of Science and Technology,Zhen’jiang
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Yu Lihua1Yu Lihua
Jiangsu University of Science and Technology,Zhen’jiang
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Affiliation:1.Jiangsu University of Science and Technology,Zhen’jiang;2.Kunshan Guoli Vacuum Electric Co.,Ltd.
Clc Number:
Fund Project:国家自然科学基金青年基金(Nos. 52001140和51801079)资助

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Abstract:

The present study is devoted to research the effect of process parameters on processability, and aging treatment on microstructure and mechanical properties of selective laser melting (SLM) high Mg-content Al-Si-Mg-Zr alloy. The results show that alloy forms a large number of fine equiaxed grains at the boundary of the molten pool, which can avoid the generation of cracks during the SLM forming process and increase the processability of the sample. The porosity of the samples obtained under different process conditions is less than 0.3%. The yield strength (YS) and ultimate tensile strength (UTS) of the as-built samples are 426 ± 8 MPa and 464 ± 12 MPa respectively. After aging treatment, due to the increase in the number of nanoparticles embedded in α-Al cells, the strength of the sample increases obviously. The maximum YS and UTS of aged samples reach 482 ± 11 MPa and 522 ± 10 MPa, respectively. The strength of present samples is much higher than that of commercial SLM-formed Al-Si-Mg alloy.

Key words:Selective laser melting; composition optimization; Al-Si-Mg-Zr alloy; microstructure; mechanical properties

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Get Citation

[Lu Hongwei, Zhang Zhijie, Luo Jinjie, Geng Yaoxiang, Ju Hongbo, Xu Junhua, Yu Lihua. Microstructure and mechanical properties of Zr modified Al-Si-Mg alloy produced by selective laser melting[J]. Rare Metal Materials and Engineering,2023,52(3):1087~1093.]
DOI：10.12442/j. issn.1002-185X.20220081

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Received:January 26,2022
Revised:May 25,2022
Adopted:June 16,2022
Online: April 07,2023
Published: March 24,2023

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