Changing the alloy composition of A17075 for better processability by selective laser melting
Changing the alloy composition of A17075 for better processability by selective laser melting
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DOI：
10.1016/j.jmatprotec.2016.08.003
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发表时间：
2016-12-01
影响因子：
6.3
通讯作者：
Van Humbeeck, Jan
中科院分区：
文献类型：
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作者：
Sistiaga, Maria L. Montero;Mertens, Raya;Van Humbeeck, Jan
传统铝合金的选择性激光熔化（SLM）主要限于铸造合金，例如AlSi10Mg和AlSi12。尽管通过SLM加工铝合金存在挑战，如高反射率，高导电性及其与氧气的反应性，但这些合金相对容易用增材制造（AM）加工，因为它们经过优化以通过熔体加工。在这项研究中，SLM的A17075，一个强大的锻造合金，被证明是导致次优密度和微裂纹。该合金通过添加4%的硅来定制，从而将密度提高到99%。此外，微裂纹显着减少的晶粒细化效果所引起的硅的添加。此外，适当的热处理可以提高SLM处理的加硅A17075合金的硬度。因此，这项工作提供了新的见解，生产高强度铝合金的AM。(C)© 2016 Elsevier B.V.版权所有。
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.