Laser processing as a high-throughput method to investigate microstructure-processing-property relationships in multiprincipal element alloys

JOURNAL OF ALLOYS AND COMPOUNDS

卷:825

Article

Li, Mu¹  Flores, Katharine M.^1,2 

[1] Washington Univ, Dept Mech Engn & Mat Sci, St Louis, MO 63130 USA

[2] Washington Univ, Inst Mat Sci & Engn, St Louis, MO 63130 USA

关键词: High-entropy alloys;    Direct laser deposition;    Microstructure;    Mechanical property;   

DOI  :  10.1016/j.jallcom.2020.154025

来源: Elsevier

【 摘 要 】

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.

【 授权许可】

Free