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Kinetics of Crack-I...
Kinetics of Crack-Induced Hydride Formation in Hexagonal Close-Packed Materials
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- Nigro, Claudio F. (författare)
- Malmö högskola,Institutionen för materialvetenskap och tillämpad matematik (MTM)
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- Bjerkén, Christina (författare)
- Malmö högskola,Institutionen för materialvetenskap och tillämpad matematik (MTM)
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- Olsson, Pär A T (författare)
- Malmö högskola,Institutionen för materialvetenskap och tillämpad matematik (MTM)
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(creator_code:org_t)
- ASME International, 2017
- 2017
- Engelska.
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Ingår i: International Hydrogen Conference (IHC 2016). - : ASME International. - 9780791861387
- Relaterad länk:
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https://urn.kb.se/re...
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visa fler...
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https://doi.org/10.1...
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Abstract
Ämnesord
Stäng
- The formation of a second phase, such as a brittle hydride, in presence of a crack is modeled for hexagonal close-packed metals. To this end, the Ginzburg-Landau phase-field formulation which relies on a sixth-order Landau potential is adopted. The crack-induced stress is implicitly included in the phase-field equation through the mechanical energy so only a single equation is solved providing computational efficiency. The second-phase precipitation evolution is studied for different crack inclinations in titanium and zirconium by using the finite volume method. The crack-induced stresses may lead to the phase transition temperature increasing above the system temperature in the crack-tip proximity. The resulting quenching effect induces a second-phase nucleation. The temporal evolution reveals that the transformation eventually reaches a steady state and the resulting precipitate geometry is dependent of the material parameters and conditions.
Ämnesord
- TEKNIK OCH TEKNOLOGIER -- Materialteknik (hsv//swe)
- ENGINEERING AND TECHNOLOGY -- Materials Engineering (hsv//eng)
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