Slip nucleation in single crystal FeNiCoCrMn high entropy alloy

被引：124
|
作者：
Patriarca, L. [1 ]
Ojha, A. [1 ]
Sehitoglu, H. [1 ]
Chumlyakov, Y. I. [2 ]
机构：
[1] Univ Illinois, Dept Mech Sci & Engn, Urbana, IL 61801 USA
[2] Tomsk State Univ, Siberian Phys Tech Inst, Tomsk 634050, Russia
来源：
SCRIPTA MATERIALIA | 2016年 / 112卷
关键词：
High entropy alloy; Slip; X-ray diffraction; Digital image correlation; Peierls stress. Critical resolved shear stress; TOTAL-ENERGY CALCULATIONS; TWINNING STRESS; METALS; DISLOCATIONS;
D O I：
10.1016/j.scriptamat.2015.09.009
中图分类号：
TB3 [工程材料学];
学科分类号：
0805 ; 080502 ;
摘要：
We present an experimental and theoretical study of slip nucleation in high entropy FeNiCoCrMn alloy which possesses superb mechanical properties. Uniaxial compression experiments were conducted on the [5 (9) over bar1] oriented single crystals. The single crystals permit evaluation of critical resolved shear stress (CRSS), and using Digital Image Correlation strain measurements it is possible to track the slip nucleation precisely. The experimental value of 175 MPa for CRSS is in excellent agreement with 178 MPa obtained utilizing an advanced atomistic-modified Peierls-Nabarro modeling formalism. This close agreement demonstrates the efficacy of our methodology and has implications in design of new high entropy alloys. (C) 2015 Elsevier Ltd. All rights reserved.
引用
收藏
页码：54 / 57
页数：4
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