Changing the alloy composition of A17075 for better processability by selective laser melting

被引：411

作者：

Sistiaga, Maria L. Montero ^{[1
]}

Mertens, Raya ^{[2
]}

Vrancken, Bey ^{[1
]}

Wang, Xiebin ^{[1
]}

Van Hooreweder, Brecht ^{[2
]}

Kruth, Jean-Pierre ^{[2
]}

Van Humbeeck, Jan ^{[1
]}

机构：

[1] Katholieke Univ Leuven, Dept Mat Engn, Kasteelpk Arenberg 44,Box 2450, B-3001 Heverlee, Belgium

[2] Katholieke Univ Leuven, Dept Mech Engn, Celestijnenlaan 300B,Box 2420, B-3001 Heverlee, Leuven, Belgium

来源：

JOURNAL OF MATERIALS PROCESSING TECHNOLOGY | 2016年 / 238卷

关键词：

Selective Laser Melting (SLM); Aluminium alloys; Laser deposition; Solidification microstructure; Si addition; Aging; MECHANICAL-PROPERTIES; ALUMINUM-ALLOY; HEAT-TREATMENT; DSC ANALYSES; MICROSTRUCTURE; PRECIPITATION; ALSI10MG; SLM;

D O I：

10.1016/j.jmatprotec.2016.08.003

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

Selective Laser Melting (SLM) of conventional aluminium alloys has mainly been restricted to casting alloys, such as AlSi10Mg and AlSi12. Despite the challenges of processing aluminium alloys via SLM, like the high reflectivity, high conductivity and its reactivity with oxygen, these alloys are relatively easy to process with Additive Manufacturing (AM) because they are optimized to be processed via the melt. In this research, SLM of A17075, a strong wrought alloy, is shown to lead to suboptimal density and microcracking. The alloy was tailored by adding 4% Silicon which increased the density to 99%. Moreover, the microcracks were significantly reduced by the grain refining effect caused by the addition of silicon. In addition, the hardness of the SLM processed Si-added A17075 alloy can be improved by proper heat treatments. As such, this work provides new insights for producing high strength aluminium alloys by AM. (C) 2016 Elsevier B.V. All rights reserved.

引用

页码：437 / 445

页数：9

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