A strong and ductile medium-entropy alloy resists hydrogen embrittlement and corrosion

Hong Luo; Seok Su Sohn; Wenjun Lu; Linlin Li; Xiaogang Li; Chandrahaasan K. Soundararajan; Waldemar Krieger; Zhiming Li; Dierk Raabe

doi:10.1038/s41467-020-16791-8

A strong and ductile medium-entropy alloy resists hydrogen embrittlement and corrosion

Hong Luo
, Seok Su Sohn
, Wenjun Lu
, Linlin Li
, Xiaogang Li^*
, Chandrahaasan K. Soundararajan
, Waldemar Krieger
, Zhiming Li^*
, Dierk Raabe^*

^*Corresponding author for this work

University of Science and Technology Beijing
Max Planck Institute for Iron Research
Korea University
School of Materials Science and Engineering
Central South University

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

317 Scopus citations

Abstract

Strong and ductile materials that have high resistance to corrosion and hydrogen embrittlement are rare and yet essential for realizing safety-critical energy infrastructures, hydrogen-based industries, and transportation solutions. Here we report how we reconcile these constraints in the form of a strong and ductile CoNiV medium-entropy alloy with face-centered cubic structure. It shows high resistance to hydrogen embrittlement at ambient temperature at a strain rate of 10⁻⁴ s⁻¹, due to its low hydrogen diffusivity and the deformation twinning that impedes crack propagation. Moreover, a dense oxide film formed on the alloy’s surface reduces the hydrogen uptake rate, and provides high corrosion resistance in dilute sulfuric acid with a corrosion current density below 7 μA cm⁻². The combination of load carrying capacity and resistance to harsh environmental conditions may qualify this multi-component alloy as a potential candidate material for sustainable and safe infrastructures and devices.

Original language	English
Article number	3081
Journal	Nature Communications
Volume	11
Issue number	1
DOIs	https://doi.org/10.1038/s41467-020-16791-8
State	Published - 1 Dec 2020
Externally published	Yes

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title = "A strong and ductile medium-entropy alloy resists hydrogen embrittlement and corrosion",

abstract = "Strong and ductile materials that have high resistance to corrosion and hydrogen embrittlement are rare and yet essential for realizing safety-critical energy infrastructures, hydrogen-based industries, and transportation solutions. Here we report how we reconcile these constraints in the form of a strong and ductile CoNiV medium-entropy alloy with face-centered cubic structure. It shows high resistance to hydrogen embrittlement at ambient temperature at a strain rate of 10−4 s−1, due to its low hydrogen diffusivity and the deformation twinning that impedes crack propagation. Moreover, a dense oxide film formed on the alloy{\textquoteright}s surface reduces the hydrogen uptake rate, and provides high corrosion resistance in dilute sulfuric acid with a corrosion current density below 7 μA cm−2. The combination of load carrying capacity and resistance to harsh environmental conditions may qualify this multi-component alloy as a potential candidate material for sustainable and safe infrastructures and devices.",

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doi = "10.1038/s41467-020-16791-8",

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AU - Luo, Hong

AU - Sohn, Seok Su

AU - Lu, Wenjun

AU - Li, Linlin

AU - Li, Xiaogang

AU - Soundararajan, Chandrahaasan K.

AU - Krieger, Waldemar

AU - Li, Zhiming

AU - Raabe, Dierk

PY - 2020/12/1

Y1 - 2020/12/1

N2 - Strong and ductile materials that have high resistance to corrosion and hydrogen embrittlement are rare and yet essential for realizing safety-critical energy infrastructures, hydrogen-based industries, and transportation solutions. Here we report how we reconcile these constraints in the form of a strong and ductile CoNiV medium-entropy alloy with face-centered cubic structure. It shows high resistance to hydrogen embrittlement at ambient temperature at a strain rate of 10−4 s−1, due to its low hydrogen diffusivity and the deformation twinning that impedes crack propagation. Moreover, a dense oxide film formed on the alloy’s surface reduces the hydrogen uptake rate, and provides high corrosion resistance in dilute sulfuric acid with a corrosion current density below 7 μA cm−2. The combination of load carrying capacity and resistance to harsh environmental conditions may qualify this multi-component alloy as a potential candidate material for sustainable and safe infrastructures and devices.

AB - Strong and ductile materials that have high resistance to corrosion and hydrogen embrittlement are rare and yet essential for realizing safety-critical energy infrastructures, hydrogen-based industries, and transportation solutions. Here we report how we reconcile these constraints in the form of a strong and ductile CoNiV medium-entropy alloy with face-centered cubic structure. It shows high resistance to hydrogen embrittlement at ambient temperature at a strain rate of 10−4 s−1, due to its low hydrogen diffusivity and the deformation twinning that impedes crack propagation. Moreover, a dense oxide film formed on the alloy’s surface reduces the hydrogen uptake rate, and provides high corrosion resistance in dilute sulfuric acid with a corrosion current density below 7 μA cm−2. The combination of load carrying capacity and resistance to harsh environmental conditions may qualify this multi-component alloy as a potential candidate material for sustainable and safe infrastructures and devices.

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DO - 10.1038/s41467-020-16791-8

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A strong and ductile medium-entropy alloy resists hydrogen embrittlement and corrosion

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