The Processing Map of Laser Powder Bed Fusion In-Situ Alloying for Controlling the Composition Inhomogeneity of AlCu Alloy

被引：1
作者：
Zhou, Yang [1 ,2 ]
Chen, Xiaohan [2 ]
Zhou, Fan [2 ]
Li, Xinggang [3 ]
Huang, Yuhe [3 ]
Zhu, Qiang [2 ]
机构：
[1] Harbin Inst Technol, Sch Mechatron Engn, Harbin 150001, Peoples R China
[2] Southern Univ Sci & Technol, Dept Mech & Energy Engn, Shenzhen 518055, Peoples R China
[3] Southern Univ Sci & Technol, Shenzhen Key Lab Addit Mfg High Performance Mat, Shenzhen 518055, Peoples R China
来源：
METALS | 2023年 / 13卷 / 01期
基金：
中国国家自然科学基金;
关键词：
in-situ alloying; composition inhomogeneity; computer simulation; processing map; CU ALLOYS; MELT FLOW; TITANIUM; MICROSTRUCTURE; MECHANISMS; SIMULATION;
D O I：
10.3390/met13010097
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
In-situ alloying is a facile method for exploring high-performance metallic materials for additive manufacturing. However, composition inhomogeneity is inevitable, and it is a double-edged sword for the properties of in-situ alloyed parts. Appropriately controlling the composition inhomogeneity benefits the applications of in-situ alloying in specific microstructural and properties design. In this work, the Al20Cu alloy was selected as the benchmark alloy to investigate the tailoring of composition inhomogeneity. The morphology and area percentage of composition inhomogeneity in the as-built samples were firstly analyzed. These results provided evidence for the formation of composition inhomogeneity and indicate that its content is tightly dependent on processing parameters. The characteristics of the molten pool under various processing parameters were investigated by modeling the laser remelting process. Based on these, a processing map was established to guide the tailoring of composition inhomogeneity. This study expands the understanding of the formation mechanism of composition inhomogeneity in in-situ alloyed parts and sheds light on employing laser powder bed fusion in-situ alloying for new materials development.
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页数：15
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