Selective Laser Melting of Al0.3CoCrFeNi High-Entropy Alloy: Printability, Microstructure, and Mechanical Properties
Selective Laser Melting of Al0.3CoCrFeNi High-Entropy Alloy: Printability, Microstructure, and Mechanical Properties
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DOI：
10.1007/s11837-019-03715-1
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发表时间：
2019-08
期刊：
影响因子：
2.6
通讯作者：
Florian Peyrouzet;Dorian Hachet;R. Soulas;C. Navone;S. Godet;S. Gorsse
中科院分区：
文献类型：
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作者：
Florian Peyrouzet;Dorian Hachet;R. Soulas;C. Navone;S. Godet;S. Gorsse
采用粉末床选择性激光熔化（SLM）法制备了Al0.3CoCrFeNi高熵合金（HEA），重点研究了其显微组织和拉伸性能。Al0.3CoCrFeNi表现出优异的印刷适性，可以制造出完全致密的产品。SLM构建HEA的微观结构为单相无序面心立方固溶体，细柱状晶粒沿构建方向拉长。构建显微组织的特征是：<110>的纤维织构向构建方向排列，位错密度大。因此，打印的Al0.3CoCrFeNi HEA与铸态或锻态相比，具有优越的拉伸强度。
Al0.3CoCrFeNi high-entropy alloy (HEA) was additively manufactured by powder-bed selective laser melting (SLM) with emphasis on its microstructure and tensile properties. Al0.3CoCrFeNi showed excellent printability, enabling fabrication of fully dense products. The microstructure of the SLM as-built HEA consisted of a single-phase disordered face-centered cubic solid solution with fine columnar grains elongated along the build direction. The characteristic features of the as-built microstructure were a <110> fiber texture aligned toward the build direction and a large dislocation density. As a consequence, printed Al0.3CoCrFeNi HEA exhibited superior tensile strength in comparison with as-cast or wrought counterparts.