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

Research output: Contribution to journalArticlepeer-review

141 Citations (Scopus)

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 languageEnglish
Article number3081
JournalNature communications
Volume11
Issue number1
DOIs
Publication statusPublished - 2020 Jun 17

Bibliographical note

Funding Information:
This work was financially supported by the European Research Council under the EU’s 7th Framework Programme (FP7/2007-2013)/ERC Grant agreement 290998. The author (H.L.) is supported by the Alexander von Humboldt Stiftung and Fundamental Research Funds for the Central Universities (No. FRF-GF-19-033BZ). The author (S.S.S.) is supported by the Korea University Grant, by the National Research Foundation of Korea (NRF-2020R1C1C1003554), and by Creative Materials Discovery Program through the National Research Foundation of Korea (NRF) funded by Ministry of Science, ICT and future Planning (MSIP) of Korea (NRF-2016M3D1A1023383). Z.L. would like to acknowledge the financial support from the National Natural Science Foundation of China (Grant No. 51971248) and the Hunan Special Funding for the Construction of Innovative Province (Grant No. 2019RS1001).

Publisher Copyright:
© 2020, The Author(s).

ASJC Scopus subject areas

  • General Chemistry
  • General Biochemistry,Genetics and Molecular Biology
  • General Physics and Astronomy

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