Excellent cryogenic temperature strength-ductility synergy in laser-powder-bed-fused TiB2p/CrMnFeCoNi high-entropy composite

被引：0

作者：

Chen, Zhao ^{[1
]}

Wen, Xiaoli ^{[1
]}

Wang, Weili ^{[1
]}

Guan, Chaoshuai ^{[2
]}

Chen, Lianyang ^{[3
]}

Lin, Xin ^{[4
]}

Yang, Haiou ^{[4
]}

Zheng, Zhangwei ^{[1
]}

Ma, Dezhi ^{[1
]}

Wu, Haibin ^{[1
]}

Li, Wenhui ^{[1
]}

Li, Nan ^{[1
]}

机构：

[1] Northwestern Polytech Univ, Sch Phys Sci & Technol, 127 Youyixilu, Xian 710072, Shaanxi, Peoples R China

[2] Lanzhou Univ, Electron Microscopy Ctr, Sch Mat & Energy, Key Lab Magnetism & Magnet Mat,Minist Educ, Lanzhou 730000, Peoples R China

[3] Northwestern Polytech Univ, Sch Aeronaut, 127 Youyixilu, Xian 710072, Shaanxi, Peoples R China

[4] Northwestern Polytech Univ, State Key Lab Solidificat Proc, Xian 710072, Shaanxi, Peoples R China

来源：

MATERIALS CHARACTERIZATION | 2025年 / 221卷

基金：

中国国家自然科学基金;

关键词：

Laser powder bed fusion; TiB2(p) /CrMnFeCoNi high-entropy composite; Strength-ductility synergy; Cryogenic temperature; Substructure; STACKING-FAULT ENERGY; BEHAVIOR; COPPER; ALLOY; CU;

D O I：

10.1016/j.matchar.2025.114766

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

The combination of tensile strength and ductility of equiatomic CrMnFeCoNi high-entropy alloy (HEA) is a critical issue in achieving intended mechanical properties for cryogenic applications. Here laser powder bed fusion (LPBF) technology is used to prepare TiB2 particle reinforced CrMnFeCoNi high-entropy composite, which exhibits similar to 1350 MPa ultra-high tensile strength (UTS) and similar to 19 % fractured elongation at cryogenic temperature, almost twice that of room temperature. The underlying mechanisms were unraveled, in which the formation of stacking faults (SFs), deformation twins (DTs) in the matrix and hard sigma phase particles, TiB2 particles, and their generated dislocation networks were found to synergistically promote the substantial improvement of strength and elongation during cryogenic temperature deformation.

引用

页数：9

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