Author
Lise Jemblie
Bio: Lise Jemblie is an academic researcher from Norwegian University of Science and Technology. The author has contributed to research in topics: Hydrogen & Hydrogen embrittlement. The author has an hindex of 5, co-authored 7 publications receiving 148 citations.
Papers
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TL;DR: ABAQUS FE simulations of hydrogen diffusion in duplex stainless steel have been performed in this paper, where three models with different ferrite-austenite configurations have been applied and the hydrogen diffusion and hydrogen coefficient have been evaluated as a function of austenite phase size and shape and the calculated diffusion coefficients compared to literature.
70 citations
TL;DR: In this article, a review of coupled diffusion and cohesive zone modelling is presented as a method for numerically assessing hydrogen embrittlement of a steel structure, and the model is able to reproduce single experimental results by appropriate fitting of the cohesive parameters, but there appears to be limitations in transferring these results to other hydrogen systems.
62 citations
TL;DR: Coupled diffusion and cohesive zone modelling is presented as a method for numerically assessing HE of a steel structure while the model is able to reproduce single experimental results by appropriate fitting of the cohesive parameters, there appears to be limitations in transferring these results to other hydrogen systems.
Abstract: Simulation of hydrogen embrittlement (HE) requires a coupled approach; on one side, the models describing hydrogen transport must account for local mechanical fields, while, on the other side, the ...
35 citations
TL;DR: In this article, a coupled finite element hydrogen diffusion and cohesive zone modelling approach was applied to simulate hydrogen induced fracture initiation in a hot-rolled bonded clad steel pipe, and the results were compared to experimental fracture mechanical testing in air and under in situ electrochemical hydrogen charging.
23 citations
08 Feb 2017-Materials Science and Engineering A-structural Materials Properties Microstructure and Processing
TL;DR: In this paper, the fracture properties of the interface between clad and base material of two 316L austenitic stainless steel pipes with and without Ni-interlayer were studied under in situ electrochemical hydrogen charging to establish crack growth resistance curves and fracture initiation toughness.
Abstract: The objective of the present work has been to study the fracture properties of the interface between clad and base material of two 316 L austenitic stainless steel - X60/X65 carbon steel hot roll bonded clad pipes; with and without a Ni-interlayer. Fracture mechanical tests were performed in air and under in situ electrochemical hydrogen charging to establish crack growth resistance curves and fracture initiation toughness for both systems. The results revealed that an electroplated Ni-interlayer reduces the fracture initiation toughness for testing in air, while it raises the fracture initiation toughness for testing in hydrogen environment. The samples with a Ni-interlayer revealed little influence of hydrogen on the fracture resistance, with a reduction in the fracture initiation toughness of 20%, attributed to crack propagation mainly occurring in the nickel layer. The samples without a Ni-interlayer revealed a strong influence of hydrogen on the fracture resistance, with a reduction in the fracture initiation toughness of 85%. An alternating crack path was proven, shifting between the dissimilar interface and the base material adjacent to the interface.
11 citations
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TL;DR: In view of the interest attaching to the vaporisation and diffusion of solids, the following observations may be worthy of record as discussed by the authors, which may be seen as a good starting point for further research.
Abstract: IN view of the interest attaching to the vaporisation and diffusion of solids, the following observations may be worthy of record.
560 citations
TL;DR: In this paper, a review of the synergistic interplay of hydrogen embrittlement mechanisms in STEEL and IR is presented, with a particular emphasis on the proposal of the novel and unified HELP+HEDE model based on the specific microstructural mapping of the dominant HE mechanisms with implications on the fracture process and resulting hydrogen-assisted fracture modes.
278 citations
TL;DR: In this article, the authors outlined sources of hydrogen attack as well as their induced failure mechanisms in pipeline steels and highlighted several past and recent studies supporting them in line with understanding of the effect of hydrogen on pipeline steel failure.
175 citations
TL;DR: In this paper, the authors discuss the issues in relation to hydrogen uptake and diffusion in steels and discuss the outstanding challenges in modelling hydrogen diffusion in terms of hydrogen assisted cracking and optimal charging conditions in hydrogen permeation measurements.
109 citations
TL;DR: In this paper, a compelling finite element framework to model hydrogen assisted fatigue by means of a hydrogen-and cycle-dependent cohesive zone formulation is presented, where the role of yield strength, work hardening, and constraint conditions in enhancing crack growth rates as a function of the loading frequency is thoroughly investigated.
85 citations