Blar i Institutt for maskinteknikk og produksjon på tidsskrift "Scripta Materialia"
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The effect of plastic deformation on hydrogen diffusion in nickel Alloy 625
(Peer reviewed; Journal article, 2022)Recently, several hydrogen-assisted failures have been reported on different nickel alloys used in the subsea oil and gas industries. It is thus essential to correlate hydrogen uptake and diffusion behavior with stress ... -
Hydrogen embrittlement effect observed by in-situ hydrogen plasma charging on a ferritic alloy
(Journal article; Peer reviewed, 2018)To study the hydrogen embrittlement (HE) effect, a novel in-situ slow strain rate tensile test together with in-situ hydrogen (H) charging by H-plasma was conducted in an environmental scanning electron microscope (ESEM). ... -
In-situ micro-cantilever bending test in environmental scanning electron microscope: Real time observation of hydrogen enhanced cracking
(Journal article, 2017)A novel approach of in-situ micro-cantilever bending tests is introduced, integrating nanoindentation and environmental scanning electron microscopy (ESEM) to elucidate hydrogen embrittlement (HE) in FeAl. Bending tests ... -
In-situ observation of martensitic transformation in an interstitial metastable high-entropy alloy during cathodic hydrogen charging
(Journal article; Peer reviewed, 2019)We show for the first time that a critical amount of dissolved hydrogen can induce a phase transformation from γ-austenite to ε-martensite in an interstitial metastable high-entropy alloy. This is demonstrated by in-situ ... -
Phenomenological approach towards modelling the acoustic emission due to plastic deformation in metals
(Journal article; Peer reviewed, 2019)Considering acoustic emission (AE) as a phenomenon reflecting the elastic energy dissipation process in deforming metals, a simple yet self-consistent model is proposed to account for the AE behaviour accompanying ... -
A predictive model unifying hydrogen enhanced plasticity and decohesion
(Peer reviewed; Journal article, 2022)The detrimental effect of hydrogen on metals which manifests itself as a transition from a ductile to a brittle failure mode is, for the first time, incorporated into a unified continuum-scale predictive framework. The ... -
Probing elementary dislocation mechanisms of local plastic deformation by the advanced acoustic emission technique
(Journal article; Peer reviewed, 2018)To gain a deeper insight into fundamental processes of localised plastic deformation, we propose a new strategy for micro-mechanical testing combining the micro-scale scratching and analysis of low amplitude acoustic ... -
Resolving the hydrogen effect on dislocation nucleation and mobility by electrochemical nanoindentation
(Journal article; Peer reviewed, 2012)