Cryo-pre-straining contributes to achieving high yield strength in high-entropy alloys

被引：1

作者：

Tao, Cheng ^{[1
]}

Chen, Chao ^{[1
]}

Fan, Jiarui ^{[1
]}

Luo, Wei ^{[1
]}

Yi, Hailong ^{[1
]}

机构：

[1] Northeastern Univ, State Key Lab Rolling & Automat, Shenyang 110819, Liaoning, Peoples R China

来源：

INTERMETALLICS | 2024年 / 168卷

基金：

中国国家自然科学基金;

关键词：

High-entropy alloy; Pre-deformation; Microstructure; Mechanical properties; HALL-PETCH RELATIONSHIP; STACKING-FAULT ENERGY; FRICTION STRESS; MICROSTRUCTURE; CRMNFECONI; DEFORMATION; MECHANISMS; TRIP;

D O I：

10.1016/j.intermet.2024.108265

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 this study, we propose an effective and feasible strategy to significantly improve the room-temperature yield strength of the Co35Cr20Fe15Mn15Ni15 HEA by 338%, from 281 MPa (as-recrystallized, before CR) to 1231 MPa (30% CR) through cryo-pre-strain-inducing defects such as dislocations, stacking-faults (SFs), nano-twins, LomerCottrell (L -C) locks, and HCP martensite, while maintaining good ductility (16.4% elongation in 30% CR). Additionally, the contribution of these defects to the yield strength enhancement was quantified. This study offers a new perspective for the preparation of advanced FCC high-entropy alloys.

引用

页数：11

共 59 条

[1] Hierarchical grain size and nanotwin gradient microstructure for improved mechanical properties of a non-equiatomic CoCrFeMnNi high-entropy alloy [J].

An, Zibing ;

Mao, Shengcheng ;

Liu, Yinong ;

Zhou, Hao ;

Zhai, Yadi ;

Tian, Zhiyong ;

Liu, Cuixiu ;

Zhang, Ze ;

Han, Xiaodong .

JOURNAL OF MATERIALS SCIENCE & TECHNOLOGY, 2021, 92 :195-207

[2] Ratcheting behavior of non-equiatomic TRIP dual-phase high entropy alloy [J].

Bahadur, Fateh ;

Sadhasivam, M. ;

Pradeep, K. G. ;

Gurao, N. P. ;

Biswas, Krishanu .

MATERIALIA, 2022, 24

[3] Study of the plastic deformation mechanism of TRIP-TWIP high entropy alloys at the atomic level [J].

Bahramyan, Mehran ;

Mousavian, Reza Taherzadeh ;

Brabazon, Dermot .

INTERNATIONAL JOURNAL OF PLASTICITY, 2020, 127

[4] On the stress dependence of partial dislocation separation and deformation microstructure in austenitic stainless steels [J].

Byun, TS .

ACTA MATERIALIA, 2003, 51 (11) :3063-3071

[5] Enhanced strengthening effect via nano-twinning in cryo-rolled FeCoCrNiMo0.2 high-entropy alloys [J].

Chen, Fei ;

Tan, Yuan-Biao ;

Xiang, Song ;

Shi, Wei ;

Liu, Fei .

MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING, 2023, 866

[6] Hierarchical microstructures and strengthening mechanisms of nano-TiC reinforced CoCrFeMnNi high-entropy alloy composites prepared by laser powder bed fusion [J].

Chen, Hongyu ;

Kosiba, Konrad ;

Lu, Tiwen ;

Yao, Ning ;

Liu, Yang ;

Wang, Yonggang ;

Prashanth, Konda Gokuldoss ;

Suryanarayana, Challapalli .

JOURNAL OF MATERIALS SCIENCE & TECHNOLOGY, 2023, 136 :245-259

[7] Tuning the degree of chemical ordering in the solid solution of a complex concentrated alloy and its impact on mechanical properties [J].

Dasari, S. ;

Jagetia, A. ;

Sharma, A. ;

Nartu, M. S. K. K. Y. ;

Soni, V ;

Gwalani, B. ;

Gorsse, S. ;

Banerjee, R. .

ACTA MATERIALIA, 2021, 212

[8] Twinning-induced plasticity (TWIP) steels [J].

De Cooman, Bruno C. ;

Estrin, Yuri ;

Kim, Sung Kyu .

ACTA MATERIALIA, 2018, 142 :283-362

[9] A novel high-entropy alloy with multi-strengthening mechanisms: Activation of TRIP effect in C-doped high-entropy alloy [J].

Do, Hyeon-Seok ;

Jang, Tae Jin ;

Kim, Ki Jeong ;

Sohn, Seok Su ;

Lee, Byeong-Joo .

MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING, 2022, 859

[10] Dual effects of pre-strain on continuous and discontinuous precipitation of L12-strengthened high-entropy alloys [J].

Fang, J. Y. C. ;

Liu, W. H. ;

Luan, J. H. ;

Yang, T. ;

Fu, M. W. ;

Jiao, Z. B. .

JOURNAL OF ALLOYS AND COMPOUNDS, 2022, 925

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