Twinning Engineering of a CoCrFeMnNi High-Entropy Alloy

被引：79
作者：
Moon, Jongun [1 ,2 ]
Bouaziz, Olivier [3 ,4 ]
Kim, Hyoung Seop [1 ,2 ,5 ]
Estrin, Yuri [6 ,7 ]
机构：
[1] Pohang Univ Sci & Technol POSTECH, Dept Mat Sci & Engn, Pohang 37673, South Korea
[2] Pohang Univ Sci & Technol POSTECH, Ctr High Entropy Alloys, Pohang 37673, South Korea
[3] Univ Lorraine, CNRS, Labe Etud Microstruct & Mecan Mat LEM3, Arts & Metier Paris Tech, Metz, France
[4] Univ Lorraine, LAB EXcellence DAMAS, F-57000 Metz, France
[5] Pohang Univ Sci & Technol POSTECH, Grad Inst Ferrous Technol, Pohang 37673, South Korea
[6] Monash Univ, Dept Mat Sci & Engn, Clayton, Vic 3800, Australia
[7] Univ Western Australia, Dept Mech Engn, Crawley, WA 6009, Australia
来源：
SCRIPTA MATERIALIA | 2021年 / 197卷
基金：
新加坡国家研究基金会;
关键词：
High-entropy alloys; Twinning; Recovery; Strain hardening; Ductility; MECHANICAL-PROPERTIES; MICROSTRUCTURE; TRANSFORMATION; EVOLUTION;
D O I：
10.1016/j.scriptamat.2021.113808
中图分类号：
TB3 [工程材料学];
学科分类号：
0805 ; 080502 ;
摘要：
Deformation-induced twinning has been a notable example of overcoming the strength/ductility tradeoff dilemma as a strengthening mechanism. By borrowing this concept from the area of TWIP steels, we designed a thermomechanical treatment for a CoCrFeMnNi high-entropy alloy to improve its mechanical characteristics. We used pre-straining at 77 K to introduce deformation-induced twins in the microstructure of the alloy, and then recovered it by annealing at 773 K, while avoiding recrystallization. The deformation-induced twins generated by pre-straining at 77 K were retained after this heat treatment, whilst partial recovery of dislocations occurred. As a result, the room-temperature mechanical properties of the alloy, including its strain hardening ability, were improved substantially. (c) 2021 Acta Materialia Inc. Published by Elsevier Ltd. All rights reserved.
引用
收藏
页数：6
相关论文
共 30 条
[1]   Exceptional phase-transformation strengthening of ferrous medium entropy alloys at cryogenic temperatures [J].
Bae, Jae Wung ;
Seol, Jae Bok ;
Moon, Jongun ;
Sohn, Seok Su ;
Jang, Min Ji ;
Um, Ho Yong ;
Lee, Byeong-Joo ;
Kim, Hyoung Seop .
ACTA MATERIALIA, 2018, 161 :388-399
[2]   Strengthening mechanisms in high entropy alloys: Fundamental issues [J].
Basu, Indranil ;
De Hosson, Jeff Th M. .
SCRIPTA MATERIALIA, 2020, 187 :148-156
[3]   High entropy alloys: Key issues under passionate debate [J].
Biswas, Krishanu ;
Yeh, Jien-Wei ;
Bhattacharjee, Pinaki P. ;
DeHosson, Jeff Th. M. .
SCRIPTA MATERIALIA, 2020, 188 :54-58
[4]   High manganese austenitic twinning induced plasticity steels: A review of the microstructure properties relationships [J].
Bouaziz, O. ;
Allain, S. ;
Scott, C. P. ;
Cugy, P. ;
Barbier, D. .
CURRENT OPINION IN SOLID STATE & MATERIALS SCIENCE, 2011, 15 (04) :141-168
[5]   Modelling of TWIP effect on work-hardening [J].
Bouaziz, O ;
Guelton, N .
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING, 2001, 319 :246-249
[6]   Nanostructured steel with high work-hardening by the exploitation of the thermal stability of mechanically induced twins [J].
Bouaziz, O. ;
Scott, C. P. ;
Petitgand, G. .
SCRIPTA MATERIALIA, 2009, 60 (08) :714-716
[7]   Isotropic and kinematic hardening of a high entropy alloy [J].
Bouaziz, Olivier ;
Moon, Jongun ;
Kim, Hyoung Seop ;
Estrin, Yuri .
SCRIPTA MATERIALIA, 2021, 191 :107-110
[8]   Effect of Process Parameters on a Metallurgical Route Providing Nano-Structured Single Phase Steel with High Work-Hardening [J].
Bouaziz, Olivier ;
Barbier, David ;
Cugy, Philippe ;
Petigand, Gerard .
ADVANCED ENGINEERING MATERIALS, 2012, 14 (1-2) :49-51
[9]   Multicomponent high-entropy Cantor alloys [J].
Cantor, B. .
PROGRESS IN MATERIALS SCIENCE, 2021, 120
[10]   Microstructural development in equiatomic multicomponent alloys [J].
Cantor, B ;
Chang, ITH ;
Knight, P ;
Vincent, AJB .
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING, 2004, 375 :213-218
123