Observation of hydrogen trapping at dislocations, grain boundaries, and precipitates

Author:

Chen Yi-Sheng12ORCID,Lu Hongzhou3ORCID,Liang Jiangtao4ORCID,Rosenthal Alexander5ORCID,Liu Hongwei6ORCID,Sneddon Glenn12,McCarroll Ingrid1ORCID,Zhao Zhengzhi4ORCID,Li Wei7ORCID,Guo Aimin3,Cairney Julie M.12ORCID

Affiliation:

1. Australian Centre for Microscopy and Microanalysis, The University of Sydney, Sydney, Australia.

2. School of Aerospace, Mechanical and Mechatronic Engineering, The University of Sydney, Sydney, Australia.

3. CITIC Metal Co., Beijing, China.

4. Collaborative Innovation Center of Steel Technology, University of Science and Technology Beijing, Beijing, China.

5. Microscopy Solutions Pty., Caulfield North, Australia.

6. Sydney Microscopy and Microanalysis, The University of Sydney, Sydney, Australia.

7. Institute of Advanced Steels and Materials, School of Materials Science and Engineering, Shanghai Jiao Tong University, Shanghai, China.

Abstract

An anti-embrittlement roadmap Hydrogen is important for energy applications such as fuel cells but tends to diffuse into materials and make them more susceptible to fracture. Chen et al. tackled the challenge of identifying the exact location of hydrogen atoms in two common steels. The light weight and high mobility of hydrogen creates serious problems with conventional techniques. The authors used cryo-transfer atom probe tomography to show that hydrogen is pinned to various interfaces in the steels. This direct look into hydrogen trapping should help with the development of materials that are more resistant to hydrogen embrittlement. Science , this issue p. 171

Funder

Australian Research Council

CITIC-CBMM Nb Steel Award Fund Program

Publisher

American Association for the Advancement of Science (AAAS)

Subject

Multidisciplinary

Reference39 articles.

1. On Some Remarkable Changes Produced in Iron and Steel by the Action of Hydrogen and Acids

2. Hydrogen embrittlement phenomena and mechanisms

3. A review of hydrogen embrittlement of martensitic advanced high-strength steels

4. Hydrogen Strategy Group Hydrogen for Australia's Future COAG Energy Council (Australian Government 2018).

5. United Nations Framework Convention on Climate Change The Paris Agreement (UNFCCC 2015).

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