The Mechanism of the High Resistance to Hydrogen-Induced Strength Loss in Ultra-High Strength High-Entropy Alloy

Zhenhuan Gao; Yunfei Xue; Jinxu Li; Lining Xu; Lijie Qiao

doi:10.3390/met12060971

The Mechanism of the High Resistance to Hydrogen-Induced Strength Loss in Ultra-High Strength High-Entropy Alloy

Zhenhuan Gao, Yunfei Xue, Jinxu Li, Lining Xu^*, Lijie Qiao^*

^*Corresponding author for this work

School of Material Science and Engineering

University of Science and Technology Beijing

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

5 Citations (Scopus)

Abstract

The resistance of the Al_0.5Cr_0.9FeNi_2.5V_0.2 high-entropy alloy (HEA) to hydrogen embrittlement (HE) was investigated by a slow strain rate test (SSRT), and the fracture surface was examined through a scanning electron microscope. Compared with other high-strength steels, Al_0.5Cr_0.9FeNi_2.5V_0.2 showed insignificant strength loss after hydrogen charging. The fracture surface of the hydrogen-charged specimens mainly consisted of dimples, and no intergranular morphology was observed. The coupling effect of the dispersed nano-structured precipitates and high-density dislocations in Al_0.5Cr_0.9FeNi_2.5V_0.2 improves the resistance to hydrogen-induced strength loss.

Original language	English
Article number	971
Journal	Metals
Volume	12
Issue number	6
DOIs	https://doi.org/10.3390/met12060971
Publication status	Published - Jun 2022

Keywords

dislocation
high-entropy alloy
hydrogen-induced strength loss
precipitate

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title = "The Mechanism of the High Resistance to Hydrogen-Induced Strength Loss in Ultra-High Strength High-Entropy Alloy",

abstract = "The resistance of the Al0.5Cr0.9FeNi2.5V0.2 high-entropy alloy (HEA) to hydrogen embrittlement (HE) was investigated by a slow strain rate test (SSRT), and the fracture surface was examined through a scanning electron microscope. Compared with other high-strength steels, Al0.5Cr0.9FeNi2.5V0.2 showed insignificant strength loss after hydrogen charging. The fracture surface of the hydrogen-charged specimens mainly consisted of dimples, and no intergranular morphology was observed. The coupling effect of the dispersed nano-structured precipitates and high-density dislocations in Al0.5Cr0.9FeNi2.5V0.2 improves the resistance to hydrogen-induced strength loss.",

keywords = "dislocation, high-entropy alloy, hydrogen-induced strength loss, precipitate",

author = "Zhenhuan Gao and Yunfei Xue and Jinxu Li and Lining Xu and Lijie Qiao",

note = "Publisher Copyright: {\textcopyright} 2022 by the authors. Licensee MDPI, Basel, Switzerland.",

year = "2022",

month = jun,

doi = "10.3390/met12060971",

language = "English",

volume = "12",

journal = "Metals",

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TY - JOUR

T1 - The Mechanism of the High Resistance to Hydrogen-Induced Strength Loss in Ultra-High Strength High-Entropy Alloy

AU - Gao, Zhenhuan

AU - Xue, Yunfei

AU - Li, Jinxu

AU - Xu, Lining

AU - Qiao, Lijie

PY - 2022/6

Y1 - 2022/6

N2 - The resistance of the Al0.5Cr0.9FeNi2.5V0.2 high-entropy alloy (HEA) to hydrogen embrittlement (HE) was investigated by a slow strain rate test (SSRT), and the fracture surface was examined through a scanning electron microscope. Compared with other high-strength steels, Al0.5Cr0.9FeNi2.5V0.2 showed insignificant strength loss after hydrogen charging. The fracture surface of the hydrogen-charged specimens mainly consisted of dimples, and no intergranular morphology was observed. The coupling effect of the dispersed nano-structured precipitates and high-density dislocations in Al0.5Cr0.9FeNi2.5V0.2 improves the resistance to hydrogen-induced strength loss.

AB - The resistance of the Al0.5Cr0.9FeNi2.5V0.2 high-entropy alloy (HEA) to hydrogen embrittlement (HE) was investigated by a slow strain rate test (SSRT), and the fracture surface was examined through a scanning electron microscope. Compared with other high-strength steels, Al0.5Cr0.9FeNi2.5V0.2 showed insignificant strength loss after hydrogen charging. The fracture surface of the hydrogen-charged specimens mainly consisted of dimples, and no intergranular morphology was observed. The coupling effect of the dispersed nano-structured precipitates and high-density dislocations in Al0.5Cr0.9FeNi2.5V0.2 improves the resistance to hydrogen-induced strength loss.

KW - dislocation

KW - high-entropy alloy

KW - hydrogen-induced strength loss

KW - precipitate

UR - https://www.scopus.com/pages/publications/85131308661

U2 - 10.3390/met12060971

DO - 10.3390/met12060971

M3 - Article

AN - SCOPUS:85131308661

SN - 2075-4701

VL - 12

JO - Metals

JF - Metals

IS - 6

M1 - 971

ER -

The Mechanism of the High Resistance to Hydrogen-Induced Strength Loss in Ultra-High Strength High-Entropy Alloy

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