Hexagonal closed-packed precipitation enhancement in a NBTIHFZR refractory high-entropy alloy

Yueli Ma; Shiwei Wu; Yuefei Jia; Pengfei Hu; Yeqiang Bu; Xiangru Chen; Gang Wang; Jiabin Liu; Hongtao Wang; Qijie Zhai

doi:10.3390/met9050485

Hexagonal closed-packed precipitation enhancement in a NBTIHFZR refractory high-entropy alloy

Yueli Ma
, Shiwei Wu
, Yuefei Jia
, Pengfei Hu
, Yeqiang Bu
, Xiangru Chen^*
, Gang Wang
, Jiabin Liu
, Hongtao Wang
, Qijie Zhai

^*Corresponding author for this work

Shanghai University
Zhejiang University

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

37 Scopus citations

Abstract

A NbTiHfZr high-entropy alloy (HEA) with a main phase of body-centered cubic structure is fabricated. Some hexagonal closed-packed (hcp) precipitates are observed in this alloy. A thermal-mechanical process, i.e., cold-rolling followed by annealing, can manipulate the volume fraction of the hcp nano-precipitates that can enhance strength and ductility. The enhancement is tailorable as a function of the volume fraction of the hcp nano-precipitate. The results indicate that the strength-ductility property can be manipulated via adjusting post-deformation heat-treatment methods, which provide a new strategy by utilizing metastability at high-temperature to design high strength refractory HEAs (RHEAs) without lost in ductility.

Original language	English
Article number	485
Journal	Metals
Volume	9
Issue number	5
DOIs	https://doi.org/10.3390/met9050485
State	Published - May 2019
Externally published	Yes

Keywords

Annealing
Cold-rolling
Ductility
High-entropy alloy
Nano-precipitation particle

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10.3390/met9050485

Cite this

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title = "Hexagonal closed-packed precipitation enhancement in a NBTIHFZR refractory high-entropy alloy",

abstract = "A NbTiHfZr high-entropy alloy (HEA) with a main phase of body-centered cubic structure is fabricated. Some hexagonal closed-packed (hcp) precipitates are observed in this alloy. A thermal-mechanical process, i.e., cold-rolling followed by annealing, can manipulate the volume fraction of the hcp nano-precipitates that can enhance strength and ductility. The enhancement is tailorable as a function of the volume fraction of the hcp nano-precipitate. The results indicate that the strength-ductility property can be manipulated via adjusting post-deformation heat-treatment methods, which provide a new strategy by utilizing metastability at high-temperature to design high strength refractory HEAs (RHEAs) without lost in ductility.",

keywords = "Annealing, Cold-rolling, Ductility, High-entropy alloy, Nano-precipitation particle",

author = "Yueli Ma and Shiwei Wu and Yuefei Jia and Pengfei Hu and Yeqiang Bu and Xiangru Chen and Gang Wang and Jiabin Liu and Hongtao Wang and Qijie Zhai",

year = "2019",

month = may,

doi = "10.3390/met9050485",

language = "英语",

volume = "9",

journal = "Metals",

issn = "2075-4701",

publisher = "Multidisciplinary Digital Publishing Institute (MDPI)",

number = "5",

}

TY - JOUR

T1 - Hexagonal closed-packed precipitation enhancement in a NBTIHFZR refractory high-entropy alloy

AU - Ma, Yueli

AU - Wu, Shiwei

AU - Jia, Yuefei

AU - Hu, Pengfei

AU - Bu, Yeqiang

AU - Chen, Xiangru

AU - Wang, Gang

AU - Liu, Jiabin

AU - Wang, Hongtao

AU - Zhai, Qijie

PY - 2019/5

Y1 - 2019/5

N2 - A NbTiHfZr high-entropy alloy (HEA) with a main phase of body-centered cubic structure is fabricated. Some hexagonal closed-packed (hcp) precipitates are observed in this alloy. A thermal-mechanical process, i.e., cold-rolling followed by annealing, can manipulate the volume fraction of the hcp nano-precipitates that can enhance strength and ductility. The enhancement is tailorable as a function of the volume fraction of the hcp nano-precipitate. The results indicate that the strength-ductility property can be manipulated via adjusting post-deformation heat-treatment methods, which provide a new strategy by utilizing metastability at high-temperature to design high strength refractory HEAs (RHEAs) without lost in ductility.

AB - A NbTiHfZr high-entropy alloy (HEA) with a main phase of body-centered cubic structure is fabricated. Some hexagonal closed-packed (hcp) precipitates are observed in this alloy. A thermal-mechanical process, i.e., cold-rolling followed by annealing, can manipulate the volume fraction of the hcp nano-precipitates that can enhance strength and ductility. The enhancement is tailorable as a function of the volume fraction of the hcp nano-precipitate. The results indicate that the strength-ductility property can be manipulated via adjusting post-deformation heat-treatment methods, which provide a new strategy by utilizing metastability at high-temperature to design high strength refractory HEAs (RHEAs) without lost in ductility.

KW - Annealing

KW - Cold-rolling

KW - Ductility

KW - High-entropy alloy

KW - Nano-precipitation particle

UR - https://www.scopus.com/pages/publications/85068419237

U2 - 10.3390/met9050485

DO - 10.3390/met9050485

M3 - 文章

AN - SCOPUS:85068419237

SN - 2075-4701

VL - 9

JO - Metals

JF - Metals

IS - 5

M1 - 485

ER -

Hexagonal closed-packed precipitation enhancement in a NBTIHFZR refractory high-entropy alloy

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Keywords

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