Advanced characterization of hydrogen and its effect in alloys

Time: Wednesday, January 18, 2023 - 2:30pm - 3:30pm
Type: Seminar Series
Presenter: Yi-Sheng Chen; Senior Research Fellow, University of Sydney
Room/Office: Room 107
Mason Lab
9 Hillhouse Avenue
New Haven, CT 06511
United States

Department of Mechanical Engineering & Materials Science Seminar

"Advanced characterization of hydrogen and its effect in alloys"

Yi-Sheng Chen
Senior Research Fellow
University of Sydney

Hydrogen is a carbon-free energy carrier that will play an essential role in the global decarbonization act. When hydrogen is absorbed by structural alloys, catastrophic failure can take place as a result of 'hydrogen embrittlement'. Understanding this effect and the exact behavior of hydrogen in alloys is necessary for developing a material solution against the problem, which can then lead to a safe hydrogen economy. However, characterizing hydrogen in materials has been one of the most challenging tasks in the field of microscopy. As such, this seminar will focus on the recent advances in developing and applying cryogenic atom probe tomography (cryo APT), a microscopic technique that enables precisely locating hydrogen in materials. We will also discuss how cryo APT can be correlatively used with other advanced characterizarion techniques to provide insight in hydrogen embrittlement and the related solution.

The Australian Centre for Microscopy and Microanalysis and the School of Aerospace, Mechanical and Mechatronic Engineering of the University of Sydney. Eason’s research interest is using advanced materials characterisation tools to study industry challenges in materials engineering. He specialises in cryogenic microscopy, particularly cryogenic atom probe tomography (cryo-APT). He uses cryo-APT to understand hydrogen embrittlement of steels and has two publications in Science on this subject. Eason’s research has attracted over 3 million Australian dollars of research funding, mainly from the Australian Research Council Linkage scheme and industry partnerships. Eason completed his PhD (2018) at the University of Oxford, United Kingdom, after a few years of industry services and his MS (2009) and BS (2007), both at National Tsing Hua University, Taiwan. He is a proud Taiwanese and a father of two lovely girls.

Wednesday, Jan. 18 at 2:30 p.m.
Mason Lab, Room 107
9 Hillhouse Avenue