Microstructure and mechanical properties of as-processed scandium-modified aluminium using selective laser melting
Microstructure and mechanical properties of as-processed scandium-modified aluminium using selective laser melting
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DOI：
10.1016/j.cirp.2016.04.057
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发表时间：
2016-01-01
影响因子：
4.1
通讯作者：
Uggowitzer, Peter J.
中科院分区：
文献类型：
--
作者：
Spierings, Adriaan B.;Dawson, Karl;Uggowitzer, Peter J.
增材制造（AM）为优化飞机和空间应用的轻量化结构提供了显著的优势。高强度铝合金在达到最大质量减少方面具有特殊的意义。本文介绍了适合于钪改性铝合金（Scalmalloy (R)）的选择性激光熔化（SLM）加工窗口的发展，该加工窗口的密度可达> ~ 99%。对加工后材料的力学性能进行了分析，指出在构建方向上具有较低的各向异性。在粗大的、细长的晶粒区旁边观察到细晶粒的微观结构。本文对观察到的微观结构进行了讨论，并对增材制造的创新材料设计提出了建议。(c) 2016年cirp。
Additive manufacturing (AM) offers significant benefits towards optimized lightweight structures for aircraft and space applications. High-strength aluminium alloys are of special interest to reach a maximum mass reduction. The paper presents the development of appropriate selective laser melting (SLM) processing windows for a scandium modified aluminium alloy (Scalmalloy (R)), reaching densities >99%. The mechanical properties of as-processed material are analyzed, pointing out a comparably low anisotropy with regard to the build orientation. A fine-grained microstructure is observed next to regions of coarser, elongated grains. The paper discusses the observed microstructure, and concludes with suggestions for innovative material design for AM. (C) 2016 CIRP.