Strong work-hardenable body-centered-cubic high-entropy alloys at cryogenic temperature

Xiaocan Wen; Li Zhu; Muhammad Naeem; Hailong Huang; Suihe Jiang; Hui Wang; Xiongjun Liu; Xiaobin Zhang; Xun-Li Wang; Yuan Wu; Zhaoping Lu

doi:10.1016/j.scriptamat.2023.115434

Strong work-hardenable body-centered-cubic high-entropy alloys at cryogenic temperature

Xiaocan Wen, Li Zhu, Muhammad Naeem, Hailong Huang, Suihe Jiang, Hui Wang, Xiongjun Liu, Xiaobin Zhang, Xun-Li Wang, Yuan Wu^*, Zhaoping Lu^*

^*Corresponding author for this work

Metallurgy and Materials

Research output: Contribution to journal › Article › peer-review

Abstract

Body-centered cubic (BCC) metals and alloys are usually brittle with limited strain hardening capability at cryogenic temperatures due to the restricted dislocation nucleation and mobility. Herein, we report that decrease of the Nb content in the TiZrHfNbTa0.2 high-entropy alloys (HEAs) can facilitate multiple deformation mechanisms, i.e., dislocation planar slip, strain-induced phase transformations and twinning, at the cryogenic temperature of 77 K due to the decreased phase stability. Particularly, the TiZrHfNb0.3Ta0.2 HEA showed pronounced strain hardening capability and exceptionally high uniform elongation of about 25% with no sign of ductile-brittle transition. Our findings are important not only for providing a prominent family of metallic materials for application at the extreme service conditions, but also for understanding the deformation mechanism of HEAs at cryogenic temperatures in general.

Original language	English
Article number	115434
Number of pages	6
Journal	Scripta Materialia
Volume	231
Early online date	27 Mar 2023
DOIs	https://doi.org/10.1016/j.scriptamat.2023.115434
Publication status	Published - 1 Jul 2023

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@article{b908f01b1b024d779f76498840b192d5,

title = "Strong work-hardenable body-centered-cubic high-entropy alloys at cryogenic temperature",

abstract = "Body-centered cubic (BCC) metals and alloys are usually brittle with limited strain hardening capability at cryogenic temperatures due to the restricted dislocation nucleation and mobility. Herein, we report that decrease of the Nb content in the TiZrHfNbTa0.2 high-entropy alloys (HEAs) can facilitate multiple deformation mechanisms, i.e., dislocation planar slip, strain-induced phase transformations and twinning, at the cryogenic temperature of 77 K due to the decreased phase stability. Particularly, the TiZrHfNb0.3Ta0.2 HEA showed pronounced strain hardening capability and exceptionally high uniform elongation of about 25% with no sign of ductile-brittle transition. Our findings are important not only for providing a prominent family of metallic materials for application at the extreme service conditions, but also for understanding the deformation mechanism of HEAs at cryogenic temperatures in general.",

author = "Xiaocan Wen and Li Zhu and Muhammad Naeem and Hailong Huang and Suihe Jiang and Hui Wang and Xiongjun Liu and Xiaobin Zhang and Xun-Li Wang and Yuan Wu and Zhaoping Lu",

year = "2023",

month = jul,

day = "1",

doi = "10.1016/j.scriptamat.2023.115434",

language = "English",

volume = "231",

journal = "Scripta Materialia",

issn = "1359-6462",

publisher = "Elsevier",

}

TY - JOUR

T1 - Strong work-hardenable body-centered-cubic high-entropy alloys at cryogenic temperature

AU - Wen, Xiaocan

AU - Zhu, Li

AU - Naeem, Muhammad

AU - Huang, Hailong

AU - Jiang, Suihe

AU - Wang, Hui

AU - Liu, Xiongjun

AU - Zhang, Xiaobin

AU - Wang, Xun-Li

AU - Wu, Yuan

AU - Lu, Zhaoping

PY - 2023/7/1

Y1 - 2023/7/1

N2 - Body-centered cubic (BCC) metals and alloys are usually brittle with limited strain hardening capability at cryogenic temperatures due to the restricted dislocation nucleation and mobility. Herein, we report that decrease of the Nb content in the TiZrHfNbTa0.2 high-entropy alloys (HEAs) can facilitate multiple deformation mechanisms, i.e., dislocation planar slip, strain-induced phase transformations and twinning, at the cryogenic temperature of 77 K due to the decreased phase stability. Particularly, the TiZrHfNb0.3Ta0.2 HEA showed pronounced strain hardening capability and exceptionally high uniform elongation of about 25% with no sign of ductile-brittle transition. Our findings are important not only for providing a prominent family of metallic materials for application at the extreme service conditions, but also for understanding the deformation mechanism of HEAs at cryogenic temperatures in general.

AB - Body-centered cubic (BCC) metals and alloys are usually brittle with limited strain hardening capability at cryogenic temperatures due to the restricted dislocation nucleation and mobility. Herein, we report that decrease of the Nb content in the TiZrHfNbTa0.2 high-entropy alloys (HEAs) can facilitate multiple deformation mechanisms, i.e., dislocation planar slip, strain-induced phase transformations and twinning, at the cryogenic temperature of 77 K due to the decreased phase stability. Particularly, the TiZrHfNb0.3Ta0.2 HEA showed pronounced strain hardening capability and exceptionally high uniform elongation of about 25% with no sign of ductile-brittle transition. Our findings are important not only for providing a prominent family of metallic materials for application at the extreme service conditions, but also for understanding the deformation mechanism of HEAs at cryogenic temperatures in general.

UR - https://doi.org/10.1016/j.scriptamat.2023.115434

U2 - 10.1016/j.scriptamat.2023.115434

DO - 10.1016/j.scriptamat.2023.115434

M3 - Article

SN - 1359-6462

VL - 231

JO - Scripta Materialia

JF - Scripta Materialia

M1 - 115434

ER -

Strong work-hardenable body-centered-cubic high-entropy alloys at cryogenic temperature

Abstract

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