期刊
JOURNAL OF ALLOYS AND COMPOUNDS
卷 825, 期 -, 页码 -出版社
ELSEVIER SCIENCE SA
DOI: 10.1016/j.jallcom.2020.154025
关键词
High-entropy alloys; Direct laser deposition; Microstructure; Mechanical property
资金
- National Science Foundation [DMR-1809571]
A direct laser deposition processing method was applied to construct compositional and microstructural libraries of AlxCoCrFeNi in an efficient and high-throughput manner. Among the compositions (x = 0.51 -1.25) and quench rates (26-6400 K/s) studied, most of the laser deposited alloys exhibit a cellular microstructure, similar to the cast materials. The microstructural feature sizes were found to follow a power law relationship with the quench rate. The dependence of the microhardness on microstructural length scale was also investigated and observed to follow a Hall-Petch relationship. This study indicates that laser processing is an effective method for rapidly and efficiently evaluating multiprincipal element alloys and their microstructures. (C) 2020 Elsevier B.V. All rights reserved.
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