Acta Metallurgica Sinica (English Letters) ›› 2021, Vol. 34 ›› Issue (6): 741-754.DOI: 10.1007/s40195-021-01233-1

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Current Challenges and Opportunities Toward Understanding Hydrogen Embrittlement Mechanisms in Advanced High-Strength Steels: A Review

Binhan Sun1(), Dong Wang2, Xu Lu2, Di Wan2, Dirk Ponge1, Xiancheng Zhang3   

  1. 1Max-Planck-Institut für Eisenforschung GmbH, Max-Planck-Straße 1, 40237, Düsseldorf, Germany
    2Department of Mechanical and Industrial Engineering, Norwegian University of Science and Technology, Richard Birkelands vei 2B, 7491, Trondheim, Norway
    3Key Laboratory of Pressure Systems and Safety, Ministry of Education, School of Mechanical and Power Engineering, East China University of Science and Technology, Shanghai, 200237, China
  • Received:2020-12-24 Revised:2021-02-21 Accepted:2021-03-03 Online:2021-06-10 Published:2021-05-31
  • Contact: Binhan Sun
  • About author:Binhan Sun. b.sun@mpie.de.

    Binhan Sun. received his Bachelor (2011) and Master (2013) degree at School of Materials and Metallurgy, Northeastern University, China. He then joined McGill University, Canada where he obtained his Ph.D. in 2017. In 2018, he received the Humboldt Research Fellowship and went to Max-Planck-Institut für Eisenforschung (MPIE) as a Postdoctoral Researcher. He is now the Topical Leader of Hydrogen Embrittlement in High-Performance Alloys in MPIE. His main research focus is processingmicrostructure- mechanical property correlations of advanced steels, with particular interest in fundamental phase transformation, deformation and damage mechanisms, and hydrogen embrittlement. He has now published near 40 peer-reviewed papers in well-reputed journals such as Acta Mater., Scripta Mater. and Science Advances. He has attended more than 10 international conferences. In the meantime, he also serves as independent reviewer for more than 20 journals and a guest editor for three SCI journals.

Abstract:

Hydrogen embrittlement (HE) is one of the most dangerous yet most elusive embrittlement problems in metallic materials. Advanced high-strength steels (AHSS) are particularly prone to HE, as evidenced by the serious degradation of their load-bearing capacity with the presence of typically only a few parts-per-million H. This strongly impedes their further development and application and could set an abrupt halt for the weight reduction strategies pursued globally in the automotive industry. It is thus important to understand the HE mechanisms in this material class, in order to develop effective H-resistant strategies. Here, we review the related research in this field, with the purpose to highlight the recent progress, and more importantly, the current challenges toward understanding the fundamental HE mechanisms in modern AHSS. The review starts with a brief introduction of current HE models, followed by an overview of the state-of-the-art micromechanical testing techniques dedicated for HE study. Finally, the reported HE phenomena in different types of AHSS are critically reviewed. Focuses are particularly placed on two representative multiphase steels, i.e., ferrite-martensite dual-phase steels and ferrite-austenite medium-Mn steels, with the aim to highlight the multiple dimensions of complexity of HE mechanisms in complex AHSS. Based on this, open scientific questions and the critical challenges in this field are discussed to guide future research efforts.

Key words: Hydrogen embrittlement, Advanced high-strength steels (AHSS), Damage mechanisms, Multiphase steels