BP-ICAM Webinar Series 2018: Mechanics of Hydrogen Diffusion and Embrittlement
In this BP-ICAM webinar, Professor Norman Fleck FRS from the University of Cambridge, discussed the mechanics of hydrogen diffusion and embrittlement.
Hydrogen embrittlement results from the diffusion of hydrogen into a metallic alloy, such as pipeline steels, and subsequent embrittlement at various trapping sites, such as grain boundaries. These traps are sites of hydrogen embrittlement, and the degree to which the traps soak up hydrogen depends upon the type of site and the enthalpy of trapping.
A large number of material parameters dictate the diffusion process. A non-dimensional analysis has been performed in order to identify the small number of governing non-dimensional groups and to analyse the two standard tests: hydrogen uptake in the electro-permeation test and hydrogen release in the thermal desorption test. Fracture mechanics for hydrogen embrittlement from short cracks has also been developed but many questions still remain.
Norman Fleck is Professor of the Mechanics of Materials in the University of Cambridge's Engineering Department. He received his Ph.D. from Cambridge in 1984 on the subject of metal fatigue, and then spent a post-doctoral year at Harvard University as Lindemann Trust Fellow, working with Professor John W. Hutchinson on creep fracture.
He returned to Cambridge as a lecturer in 1986, and was subsequently promoted to a Readership and then to a Professorship. He is the Founder-Director of the Cambridge Centre for Micromechanics, and was Head of the Mechanics, Materials and Design Division for 11 years, until 2009.
He is an ISI highly cited author with over 280 journal publications, and is a Fellow of the Royal Society, Royal Academy of Engineering, Academia Europaea and of the European Academy of Science. He is on the editorial boards of several engineering journals, and has close collaborations with many US and European groups, having held visiting positions at Harvard University and at NASA Langley. He combines experiments and theory to develop mesoscale and macroscale constitutive models of engineering materials.
Follow us on LinkedIn: https://www.linkedin.com/company/the-bp-international-centre-for-advanced-materials/
Видео BP-ICAM Webinar Series 2018: Mechanics of Hydrogen Diffusion and Embrittlement канала The bp International Centre for Advanced Materials
Hydrogen embrittlement results from the diffusion of hydrogen into a metallic alloy, such as pipeline steels, and subsequent embrittlement at various trapping sites, such as grain boundaries. These traps are sites of hydrogen embrittlement, and the degree to which the traps soak up hydrogen depends upon the type of site and the enthalpy of trapping.
A large number of material parameters dictate the diffusion process. A non-dimensional analysis has been performed in order to identify the small number of governing non-dimensional groups and to analyse the two standard tests: hydrogen uptake in the electro-permeation test and hydrogen release in the thermal desorption test. Fracture mechanics for hydrogen embrittlement from short cracks has also been developed but many questions still remain.
Norman Fleck is Professor of the Mechanics of Materials in the University of Cambridge's Engineering Department. He received his Ph.D. from Cambridge in 1984 on the subject of metal fatigue, and then spent a post-doctoral year at Harvard University as Lindemann Trust Fellow, working with Professor John W. Hutchinson on creep fracture.
He returned to Cambridge as a lecturer in 1986, and was subsequently promoted to a Readership and then to a Professorship. He is the Founder-Director of the Cambridge Centre for Micromechanics, and was Head of the Mechanics, Materials and Design Division for 11 years, until 2009.
He is an ISI highly cited author with over 280 journal publications, and is a Fellow of the Royal Society, Royal Academy of Engineering, Academia Europaea and of the European Academy of Science. He is on the editorial boards of several engineering journals, and has close collaborations with many US and European groups, having held visiting positions at Harvard University and at NASA Langley. He combines experiments and theory to develop mesoscale and macroscale constitutive models of engineering materials.
Follow us on LinkedIn: https://www.linkedin.com/company/the-bp-international-centre-for-advanced-materials/
Видео BP-ICAM Webinar Series 2018: Mechanics of Hydrogen Diffusion and Embrittlement канала The bp International Centre for Advanced Materials
Показать
Комментарии отсутствуют
Информация о видео
25 июня 2018 г. 17:44:39
00:48:33
Другие видео канала
Hydrogen EmbrittlementBP-ICAM Webinar Series 2019: When Soft Materials Meet Electron MicroscopyWhat is hydrogen embrittlement and what can be done to prevent it?bp-ICAM Webinar Series 2020: Fast Charging, High Energy, and Rechargeable BatteriesHydrogen embrittlement of complex microstructures in steelsHydrogen Diffusion DemonstrationEML Webinar by Chiara Daraio on mechanics of robotic matterHydrogen Induced Cracking: Risks and how to avoid themBP-ICAM Webinar Series 2017: Bio-Inspired Photonicsbp-ICAM Webinar: Sustainable and Functional PolymersSulfidition Damage Mechanism - Chevron accident 2012bp-ICAM Webinar Series 2020: Nature-Inspired Engineering of Multifunctional MaterialsBP-ICAM Webinar: Electrochemical Techniques for CorrosionHydrogen Embrittlement of SteelsBP-ICAM Webinar Series 2017: Corrosion StudiesEML Webinar by Norman Fleck. Discussion leader: Vikram DeshpandeBP-ICAM Webinar Series 2017: Self-Organized Metallic Alloys for Wear ApplicationsBP-ICAM Webinar Series 2018: Keeping an Eye on Advanced MaterialsBP-ICAM: A Partnership That DeliversESB Webinar Series – No.04 - FEBio, a Nonlinear Finite Element Solver for Biomechanics