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Multi-field modeling of hydrogen transport and fracture in group 4 transition metals
Malmö högskola, Teknik och samhälle (TS).ORCID-id: 0000-0002-6141-3963
Malmö högskola, Teknik och samhälle (TS).
2012 (engelsk)Inngår i: Proceedings of the International Hydrogen Conference (IHC 2012): Hydrogen-Materials Interactions, ASME Press, 2012, s. 717-726Konferansepaper, Publicerat paper (Annet vitenskapelig)
Abstract [en]

This work deals with a computational model for hydrogen transport, hydrogen induced deformation, embrittlement and fracture in hydride forming metals, notably Ti and Zr. The model uses a continuum description of the two-phase (alpha-phase metal plus delta-phase hydride) material, and solves the multi-field partial differential equations for temperature- and stress-directed hydrogen diffusion together with mechanical equilibrium in a three-dimensional finite element setting. Point-kinetics models are used for metal-hydride phase transfor¬mation and stress-directed orientation of hydrides, while a cohesive zone fracture model caters for initiation and propagation of cracks. The model as a whole is versatile and can be used to study a wide range of problems and conditions involving transport of hydrogen by directed diffusion in combination with hydride precipitation and fracture. The applicability of the model is demon-strated by simulations of fracture tests on a hydrogen-charged Zr-Nb alloy.

sted, utgiver, år, opplag, sider
ASME Press, 2012. s. 717-726
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URN: urn:nbn:se:mau:diva-16799DOI: 10.1115/1.860298_ch77Lokal ID: 16904ISBN: 9780791860298 (tryckt)OAI: oai:DiVA.org:mau-16799DiVA, id: diva2:1420313
Konferanse
International Hydrogen Conference (IHC), Jackson Lake Lodge Moran, Wyoming USA (2012)
Tilgjengelig fra: 2020-03-30 Laget: 2020-03-30 Sist oppdatert: 2024-04-29bibliografisk kontrollert

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Totalt: 120 treff
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