Selective laser melting of 2024-modified AlSi10Mg alloy

被引：0

作者：

Jia Z.-Q. ^{[1
,2
]}

Gao T. ^{[1
,2
]}

Wang G.-L. ^{[1
,2
]}

Liu X.-F. ^{[1
,2
]}

Zhao G.-Q. ^{[1
,2
]}

Wang X.-B. ^{[1
,2
]}

机构：

[1] Key Laboratory for Liquid-Solid Structural Evolution and Processing of Materials (Ministry of Education), Shandong University, Jinan

[2] School of Materials Science and Engineering, Shandong University, Jinan

来源：

Zhongguo Youse Jinshu Xuebao/Chinese Journal of Nonferrous Metals | 2022年 / 32卷 / 11期

基金：

中国国家自然科学基金;

关键词：

2024; alloy; Additive manufacturing; AlSi10Mg; Aluminum alloy; Selective laser melting;

D O I：

10.11817/j.ysxb.1004.0609.2021-42749

中图分类号：

学科分类号：

摘要：

In this work, 2024 alloy powders with 1.5% (mass fraction) TiC nanoparticles were produced first. The special 2024(TiC) alloy powders were added into the widely used AlSi10Mg powders through mechanical mixing. Selective laser melting technique was used to fabricated the samples. The microstructure and mechanical properties of the as-fabricated samples and the samples after T6 heat treatment (solution treated at 520 ℃ for 2 h, aging at 190 ℃ for 10 h) were studied. The results show that the TiC nanoparticles could act as the heterogeneous nucleation site of Al grains, leading to the suppression of coarse columnar grains. As a result, the microstructure could be refined remarkably. Moreover, the strong 〈100〉//BD (Build direction) fiber texture is suppressed largely. After T6 heat treatment, the strength of AlSi10Mg alloy drops to 260 MPa, while the strength of 2024(TiC) modified alloy, i.e. AlSi10Mg-2024(TiC) alloy, maintains at a high level of around 400 MPa. This is because the addition of 2024 alloy will introduce Cu element, which promotes the formation of second-phase particles during subsequent aging treatment, and thus strengthening the aluminum matrix. Moreover, the precipitation of nanoscale Si particles may also help to strengthen the T6-treated AlSi10Mg-2024(TiC) alloy. © 2022, China Science Publishing & Media Ltd. All right reserved.

引用

页码：3257 / 3267

页数：10

共 31 条

[31] WANG Y, WANG Y T, LI R D, Et al., Hall-Petch relationship in selective laser melting additively manufactured metals: Using grain or cell size?, Journal of Central South University, 28, 4, pp. 1043-1057, (2021)

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