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Published January 15, 2025 | Published
Journal Article Open

A self-consistent void-based rationale for hydrogen embrittlement

  • 1. ROR icon Uppsala University
  • 2. ROR icon Norwegian University of Science and Technology
  • 3. ROR icon California Institute of Technology

Abstract

Solely based on the failure process of metallic materials containing voids, we propose a straightforward rationale for a self-consistent void-based hydrogen embrittlement (CVHE) predictive framework that effectively captures ductile failure, hydrogen-induced loss of ductility, and most importantly, the ductile-to-brittle transition. While the coupling effect of homogenously distributed secondary voids is well-documented, the rigor of our approach lies in the precise definition of an array of equally sized and spaced secondary voids nucleated aligning with the hydrogen embrittlement mechanisms HEDE, HELP and HESIV, in the ligament between primary voids. The CVHE model can quantitatively predict the full range of embrittlement; it naturally reveals the brittle inter-ligament decohesion associated with an intrinsic lower bound of ductility, when the secondary voids are sufficiently small. Counterintuitively, our results show that ductility reduction accelerates with a decrease in the secondary void volume fraction, and that smaller voids lead to greater embrittlement.

Copyright and License

© 2024 The Author(s). Published by Elsevier Ltd on behalf of Acta Materialia Inc. Under a Creative Commons license

Acknowledgement

ZZ acknowledges the financial support from the Research Council of Norway via the “Safety and Integrity of Hydrogen Transport Pipelines” project (HyLine II, Project No.344377) and “Microstructure-Informed Hydrogen Embrittlement Life Prediction of Nickel-Based Alloys” project (Helife, Project No. 344297). ZZ and HY acknowledge the financial support from Nordic Energy Research, Research Council of Norway (Project No. 347726) and Swedish Energy Agency (P2023-00687) via the “Material and structural integrity assessment for safe Nordic hydrogen transportation infrastructure” project. HY acknowledges the financial support from Swedish Research Council (VR Starting Grant 2023-05055).

Contributions

Haiyang Yu: Conceptualization, Formal analysis, Investigation, Methodology, Validation, Writing – original draft, Writing – review & editing. Jianying He: Investigation, Methodology, Writing – review & editing. David Didier Morin: Methodology, Writing – review & editing. Michael Ortiz: Methodology, Writing – review & editing. Zhiliang Zhang: Conceptualization, Funding acquisition, Investigation, Methodology, Project administration, Writing – review & editing.

Supplemental Material

Includes supplemental material: https://ars.els-cdn.com/content/image/1-s2.0-S135964622400438X-mmc1.docx

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Additional details

Created:
October 18, 2024
Modified:
October 18, 2024