Strength-ductility synergy of Al0.1CoCrFeNi high-entropy alloys with gradient hierarchical structures

被引：64

作者：

Chen, G. ^{[1
,2
]}

Qiao, J. W. ^{[3
]}

Jiao, Z. M. ^{[1
,2
]}

Zhao, D. ^{[1
,2
]}

Zhang, T. W. ^{[1
,2
]}

Ma, S. G. ^{[1
,2
]}

Wang, Z. H. ^{[1
,2
]}

机构：

[1] Taiyuan Univ Technol, Coll Mech & Vehicle Engn, Inst Appl Mech, Taiyuan 030024, Shanxi, Peoples R China

[2] Taiyuan Univ Technol, Shanxi Key Lab Mat Strength & Struct Impact, Taiyuan 030024, Shanxi, Peoples R China

[3] Taiyuan Univ Technol, Coll Mat Sci & Engn, Inst High Entropy Alloys, Taiyuan 030024, Shanxi, Peoples R China

来源：

SCRIPTA MATERIALIA | 2019年 / 167卷

基金：

中国国家自然科学基金;

关键词：

High-entropy alloys; Cyclic dynamic torsion; Gradient hierarchical structures; Deformation twins; Mechanical properties; MECHANICAL-PROPERTIES; DEFORMATION; SHEAR; CARBON;

D O I：

10.1016/j.scriptamat.2019.04.002

中图分类号：

TB3 [工程材料学];

学科分类号：

0805 ; 080502 ;

摘要：

A new strategy for strengthening Al0.1CoCrFeNi high-entropy alloys (HEM) is introduced by architecting the gradient hierarchical structures (GHS). The GHS sheets show a dramatic enhancement in tensile yielding strength and acceptable tensile ductility, outperforming the annealed counterpart, owing to extraordinary strain hardening capacity and nanotwinning activity. The yielding strengths of the GHS sheets are higher than the values calculated by the role of mixture from separate gradient components, suggesting that a synergetic strengthening mechanism of the GHS plays an important role. It may provide a novel guidance to develop HEM by tailoring and architecting optimized mechanical behaviors from bulk GHS. (C) 2019 Published by Elsevier Ltd on behalf of Acta Materialia Inc.

引用

页码：95 / 100

页数：6

共 30 条

[1] DEFORMATION OF PLASTICALLY NON-HOMOGENEOUS MATERIALS [J].