Journal ArticleDOI
Direct observations of hydrogen enhanced crack propagation in iron
T. Tabata,H.K. Birnbaum +1 more
TLDR
In this paper, the first direct observations of hydrogen-enhanced fracture using in situ fracture studies in H/sub 2/ gas in the environmental cell of a H.V.E.M.About:
This article is published in Scripta Metallurgica.The article was published on 1984-03-01. It has received 217 citations till now. The article focuses on the topics: Fracture mechanics & Hydrogen embrittlement.read more
Citations
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Journal ArticleDOI
Hydrogen-enhanced localized plasticity—a mechanism for hydrogen-related fracture
TL;DR: In this article, a theory of hydrogen shielding of the interaction of dislocations with elastic stress centres is outlined, which can account for the observed hydrogen-enhanced dislocation mobility.
Journal ArticleDOI
Steels for bearings
TL;DR: In this paper, the structure and properties of bearing steels prior to the point of service are first assessed and described in the context of steelmaking, manufacturing and engineering requirements, followed by a thorough critique of the damage mechanisms that operate during service and in accelerated tests.
Journal ArticleDOI
Environmentally Assisted Cracking: Overview of Evidence for an Adsorption-Induced Localised-Slip Process,
TL;DR: In this paper, it was shown that hydrogen-assisted cracking occurs because adsorption facilitates the injection of dislocations from crack tips and thereby promotes the coalescence of cracks with voids ahead of cracks.
Journal ArticleDOI
The effect of hydrogen on dislocation dynamics
TL;DR: In this paper, the authors performed deformation studies in situ in a transmission electron microscope equipped with an environmental cell to elucidate the mechanisms of hydrogen embrittlement and found that solute hydrogen can increase the velocity of dislocations, increase the crack propagation rate, decrease stacking-fault energy of 310s stainless steel and increase the propensity for edge character dislocation.
Journal ArticleDOI
Hydrogen Embrittlement Understood
Ian M. Robertson,Ian M. Robertson,Petros Athanasios Sofronis,Petros Athanasios Sofronis,Akihide Nagao,May L. Martin,Shuai Wang,Shuai Wang,D. W. Gross,Kelly E. Nygren +9 more
TL;DR: The connection between hydrogen-enhanced plasticity and the hydrogen-induced fracture mechanism and pathway is established through examination of the evolved microstructural state immediately beneath fracture surfaces including voids, quasi-cleavage, and intergranular surfaces as discussed by the authors.
References
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Journal ArticleDOI
Effects of hydrogen on the properties of iron and steel
TL;DR: In this paper, the effects of hydrogen on the physical and mechanical properties of iron and steel are reviewed and a new mechanism for the cold work peak for hydrogen in iron is considered.
Journal ArticleDOI
A new model for hydrogen-assisted cracking (hydrogen “embrittlement”)
TL;DR: A new model for hydrogen-assisted cracking is presented in this article, which explains the observations of decreasing microscopic plasticity and changes of fracture modes with decreasing stress intensities at crack tips during stress-corrosion cracking and HAC of quenched-and tempered steels.
Journal ArticleDOI
Equilibrium aspects of hydrogen-induced cracking of steels
R.A. Oriani,P.H. Josephic +1 more
TL;DR: In this paper, the threshold pressures, p ∗, of hydrogen and of deuterium gases necessary to cause crack propagation in AISI 4340 steel of 250 ksi yield strength, were determined as functions of plane-strain stress intensity factor K at room temperature.
Journal ArticleDOI
The Thermodynamics of Stressed Solids
TL;DR: In this article, the existence of a chemical potential of a mobile component everywhere within a solid within a generalized stress system is demonstrated, as well as also the presence of an immobile component of a stressed body at appropriate interfaces.
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An HVEM study of hydrogen effects on the deformation and fracture of nickel
Ian M. Robertson,H.K. Birnbaum +1 more