Fine tuning of tensile properties in CrCoNi medium entropy alloy through cold rolling and annealing

被引：69
作者：
Sathiyamoorthi, Praveen [1 ,2 ]
Asghari-Rad, Peyman [1 ,2 ]
Bae, Jae Wung [1 ,2 ]
Kim, Hyoung Seop [3 ]
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] Yonsei Univ, Dept Mat Sci & Engn, Seoul 03722, South Korea
来源：
INTERMETALLICS | 2019年 / 113卷
基金：
新加坡国家研究基金会;
关键词：
Partial recrystallization; Tensile properties; Medium entropy alloy; Deformation twins; Thermo-mechanical processing; HIGH-PRESSURE TORSION; CU-AL ALLOYS; EQUIATOMIC MEDIUM; HIGH-STRENGTH; MECHANICAL-PROPERTIES; DEFORMATION-BEHAVIOR; PLASTIC-DEFORMATION; MICROSTRUCTURE; DUCTILITY; RECRYSTALLIZATION;
D O I：
10.1016/j.intermet.2019.106578
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：
In the present study, tensile properties of CrCoNi medium entropy alloy with different microstructures (recovery, partial recrystallization, recrystallization) were investigated by subjecting cold-rolled samples to different annealing conditions. The microstructure of the cold-rolled sample showed the presence of severely deformed grains with several deformation twins. Annealing of the cold-rolled samples at 700 degrees C and above for 60 min led to fully recrystallized microstructure, while annealing at temperatures lower than 700 degrees C led to recovery and partially recrystallized microstructures. The annealed samples showed a typical strength-ductility trade-off with an increasing fraction of recrystallized grains and increasing average grain size in samples with partially recrystallized and fully recrystallized microstructure, respectively. Fine tuning of microstructure led to a remarkable combination of strength (similar to 1 GPa) and uniform elongation (28%) in the sample with partially recrystallized microstructure, which consists of similar to 77% of recrystallized grains with an average recrystallized grain size of similar to 3 mu m.
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页数：6
相关论文
共 41 条
[11]   Multistage strain hardening through dislocation substructure and twinning in a high strength and ductile weight-reduced Fe-Mn-Al-C steel [J].
Gutierrez-Urrutia, I. ;
Raabe, D. .
ACTA MATERIALIA, 2012, 60 (16) :5791-5802
[12]   Critical stress for twinning nucleation in CrCoNi-based medium and high entropy alloys [J].
Huang, He ;
Li, Xiaoqing ;
Dong, Zhihua ;
Li, Wei ;
Huang, Shuo ;
Meng, Daqiao ;
Lai, Xinchun ;
Liu, Tianwei ;
Zhu, Shengfa ;
Vitos, Levente .
ACTA MATERIALIA, 2018, 149 :388-396
[13]   Hardening by annealing and softening by deformation in nanostructured metals [J].
Huang, XX ;
Hansen, N ;
Tsuji, N .
SCIENCE, 2006, 312 (5771) :249-251
[14]   Plastic Deformation Behavior of 40Fe-25Ni-15Cr-10Co-10V High-Entropy Alloy for Cryogenic Applications [J].
Jang, Min Ji ;
Kwak, Hyunjeong ;
Lee, Ye Won ;
Jeong, Youjin ;
Choi, Jahong ;
Jo, Yong Hee ;
Choi, Won-Mi ;
Sung, Hyun Je ;
Yoon, Eun Yoo ;
Praveen, S. ;
Lee, Sunghak ;
Lee, Byeong-Joo ;
Abd El Aal, Mohamed Ibrahim ;
Kim, Hyoung Seop .
METALS AND MATERIALS INTERNATIONAL, 2019, 25 (02) :277-284
[15]   Microstructure and mechanical properties of friction stir welded and laser welded high entropy alloy CrMnFeCoNi [J].
Jo, Min-Gu ;
Kim, Han-Jin ;
Kang, Minjung ;
Madakashira, Phaniraj P. ;
Park, Eun Soo ;
Suh, Jin-Yoo ;
Kim, Dong-Ik ;
Hong, Sung-Tae ;
Han, Heung Nam .
METALS AND MATERIALS INTERNATIONAL, 2018, 24 (01) :73-83
[16]   Cryogenic strength improvement by utilizing room-temperature deformation twinning in a partially recrystallized VCrMnFeCoNi high-entropy alloy [J].
Jo, Y. H. ;
Jung, S. ;
Choi, W. M. ;
Sohn, S. S. ;
Kim, H. S. ;
Lee, B. J. ;
Kim, N. J. ;
Lee, S. .
NATURE COMMUNICATIONS, 2017, 8
[17]  
Kim JH, 2019, MET MATER INT, V25, P296
[18]   Reasons for the superior mechanical properties of medium-entropy CrCoNi compared to high-entropy CrMnFeCoNi [J].
Laplanche, G. ;
Kostka, A. ;
Reinhart, C. ;
Hunfeld, J. ;
Eggeler, G. ;
George, E. P. .
ACTA MATERIALIA, 2017, 128 :292-303
[19]   The microstructural evolution of aluminum alloy 7055 manufactured by hot thermo-mechanical process [J].
Liao, Bin ;
Wu, Xiaodong ;
Cao, Lingfei ;
Huang, Guangjie ;
Wang, Zhengan ;
Liu, Qing .
JOURNAL OF ALLOYS AND COMPOUNDS, 2019, 796 :103-110
[20]   Stress relaxation and the structure size-dependence of plastic deformation in nanotwinned copper [J].
Lu, Lei ;
Zhu, Ting ;
Shen, Yongfeng ;
Dao, Ming ;
Lu, K. ;
Suresh, Subra .
ACTA MATERIALIA, 2009, 57 (17) :5165-5173
12345