材料科学技术(英文版)2024，Vol.187Issue(20) ：72-85.DOI:10.1016/j.jmst.2023.11.047

TiZrHfNb refractory high-entropy alloys with twinning-induced plasticity

Shubin Wang Da Shu Peiying Shi Xianbing Zhang Bo Mao Donghong Wang Peter.K.Liaw Baode Sun
材料科学技术(英文版)2024，Vol.187Issue(20) ：72-85.DOI:10.1016/j.jmst.2023.11.047
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TiZrHfNb refractory high-entropy alloys with twinning-induced plasticity

Shubin Wang 1Da Shu 1Peiying Shi 2Xianbing Zhang 3Bo Mao 1Donghong Wang 1Peter.K.Liaw 4Baode Sun1
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作者信息

  • 1. Shanghai Key Lab of Advanced High-temperature Materials and Precision Forming and State Key Lab of Metal Matrix Composites,School of Materials Science and Engineering,Shanghai Jiao Tong University,Shanghai 200240,China
  • 2. Shanghai Institute of Applied Physics,Chinese Academy of Sciences,Shanghai 201800,China
  • 3. Department of Mechanical and Energy Engineering,Southern University of Science and Technology,Shenzhen 518055,China
  • 4. Department of Materials Science and Engineering,The University of Tennessee,Knoxville,TN,37996,USA
  • 折叠

Abstract

The twinning-induced plasticity(TWIP)effect has been widely utilized in austenite steels,β-Ti alloys,and recently developed face-centered-cubic(FCC)high-entropy alloys(HEAs)to simultaneously enhance the tensile strength and ductility.In this study,for the first time,the TWIP effect through hierarchical{332<113>mechanical twinning has been successfully engineered into the TiZrHfNb refractory HEAs by decreasing temperature and tailoring the content of Nb to destabilize the BCC phase.At cryogenic tem-perature,the comprehensive hierarchical {332}<113>mechanical twins are activated in TiZrHfNb0.5 alloy from micro-to nanoscale and progressively segment the BCC grains into nano-scale islands during de-formation,ensuring sustainable strain hardening capability and eventually achieving a substantial 35％uniform tensile elongation.In addition,at 77 K,the tensile strength and uniform elongation of TiZrHfNbx alloys can further be adjusted by a moderate increase of Nb.The results above shed new light on the de-velopment of high-performance refractory HEAs with a high and adjustable strength and ductility com-bination down to the cryogenic temperature.

Key words

Refractory high-entropy alloys/Cryogenic temperature/Twinning induced plasticity/Hierarchical twins/Tensile properties

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基金项目

National Natural Science Foundation of China(52301163)

National Natural Science Foundation of China(51821001)

National Key R&D Program of China(2022YFB3706800)

National Science Foundation(DMR-1611180)

National Science Foundation(1809640)

National Science Foundation(2226508)

US Army Research Office(W911NF-13-1-0438)

US Army Research Office(W911NF-19-2-0049)

出版年

2024
材料科学技术(英文版)
中国金属学会 中国材料研究学会 中国科学院金属研究所

材料科学技术(英文版)

CSTPCD
影响因子：0.657
ISSN：1005-0302
参考文献量78
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