Work

Hydrogen informed Gurson model for hydrogen embrittlement simulation

Year: 2019

Type: article

Abstract: Hydrogen-microvoid interactions were studied via unit cell analyses with different hydrogen concentrations. The absolute failure strain decreases with hydrogen concentration, but the failure loci were found to follow the same trend dependent only on stress triaxiality, in other words, the effects of geometric constraint and hydrogen on failure are decoupled. Guided by the decoupling principle, a hydrogen informed Gurson model is proposed. This model is the first practical hydrogen embrittlement simulation tool based on the hydrogen enhanced localized plasticity (HELP) mechanism. It introduces only one additional hydrogen related parameter into the Gurson model and is able to capture hydrogen enhanced internal necking failure of microvoids with accuracy; its parameter calibration procedure is straightforward and cost efficient for engineering purpose.

Source: Engineering Fracture Mechanics

DOI: 10.1016/j.engfracmech.2019.106542

Authors: Haiyang Yu, Jim Stian Olsen, Antonio Alvaro, Lijie Qiao, Jianying He, Zhiliang Zhang

Institutions: Norwegian University of Science and Technology, University of Oxford, SINTEF, University of Science and Technology Beijing

Language: English

Topic: Hydrogen embrittlement and corrosion behaviors in metals

Subfield: Metals and Alloys

Field: Materials Science

Domain: Physical Sciences

Open Access status: hybrid

Estimated APC paid: $2,650

Funders: Aker Solutions ASA, Norges Teknisk-Naturvitenskapelige Universitet, Norges Forskningsråd