CUED Publications database

A mechanistic framework for hydrogen embrittlement

Martínez-Pañeda, E and Del Busto, S and Betegón, C (2017) A mechanistic framework for hydrogen embrittlement. In: UNSPECIFIED pp. 816-817..

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Abstract

A new mechanism-based approach for hydrogen assisted cracking is proposed. The modeling framework incorporates: (i) the role of statistically stored and geometrically necessary dislocations on crack tip stresses and hydrogen diffusion, (ii) a novel dislocation-based approach to deal with the reversibly trapped hydrogen concentration and (iii) a cohesive zone formulation to account for hydrogen-lowering of the fracture resistance. Finite element computations are conducted, with a control algorithm being employed to ensure convergence in crack propagation studies. Results reveal a very good agreement with the experiments and the important implications of the results in the understanding of hydrogen embrittlement mechanisms are thoroughly discussed.

Item Type: Conference or Workshop Item (UNSPECIFIED)
Subjects: UNSPECIFIED
Divisions: Div C > Materials Engineering
Depositing User: Cron Job
Date Deposited: 05 Jun 2019 20:19
Last Modified: 13 Apr 2021 08:41
DOI: