Effect of heat treatment on precipitation behavior and mechanical properties of FeCrNi-based medium entropy alloy fabricated by additive manufacturing

被引：1
作者：
Bai, Xi [1 ,2 ]
Wang, Jianqiu [2 ,3 ]
Zhang, Zhiheng [3 ]
Wang, Lei [1 ]
Han, Enhou [3 ]
机构：
[1] Northeastern Univ, Sch Mat Sci & Engn, Key Lab Anisotropy & Texture Mat, Minist Educ, Shenyang 110819, Peoples R China
[2] Chinese Acad Sci, CAS Key Lab Nucl Mat & Safety Assessment, Inst Met Res, Shenyang 110016, Peoples R China
[3] Inst Corros Sci & Technol, Guangzhou 510530, Peoples R China
来源：
INTERMETALLICS | 2024年 / 172卷
基金：
中国国家自然科学基金;
关键词：
Medium entropy alloys; Laser powder bed fusion; Precipitation behavior; Mechanical properties; TENSILE PROPERTIES; FCC; MICROSTRUCTURE; DEFORMATION; STABILITY; DUCTILITY; STRENGTH;
D O I：
10.1016/j.intermet.2024.108386
中图分类号：
O64 [物理化学（理论化学）、化学物理学];
学科分类号：
070304 ; 081704 ;
摘要：
The precipitation behavior, mechanical properties, and strengthening mechanisms of FeCrNi-based medium entropy alloys fabricated by laser powder bed fusion and followed by aging treatment were investigated. Yield strength of the aged (FeCrNi)94Ti3Al3 alloy increases significantly from 993 to 1487 MPa, which is correlated to the strengthening effect of the co-existing several methods of hardening. Theoretical analyses demonstrate that coherent L12 nanoparticles formed within the face-centered cubic matrix contributes most of the improved strength for the aged (FeCrNi)94Ti3Al3 alloy, whereas recovery during aging cause the decrease of dislocation density thus exerts a softening effect. The results suggest the significant potential of precipitation strengthening for adjusting mechanical properties in alloys produced through laser powder bed fusion.
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页数：12
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