Function of Hydrogen in Embrittlement of High-strength Steels
TLDR
In this article, the role of deformation-induced defects that interact with hydrogen is discussed, and a model is proposed in which increased vacancy density and agglomeration lead to the promotion of failure.Abstract:
Various models so far proposed for the mechanism of hydrogen embrittlement (HE) of steels are critically reviewed with respect to the manifestation of hydrogen in the fracture process. Recent studies that elucidate the hydrogen states and their relevance to HE are discussed. Particular attention is paid to the role of deformation-induced defects that interact with hydrogen. A model is proposed in which increased vacancy density and agglomeration lead to the promotion of failure. The model ascribes HE to the context of ductile fracture in which vacancies play the primary role.read more
Citations
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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.
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.
Journal ArticleDOI
Stability and clusterization of hydrogen-vacancy complexes in α-Fe: An ab initio study
Yoshitaka Tateyama,Takahisa Ohno +1 more
TL;DR: In this article, the stability of hydrogen-monovacancy complexes and their binding preferences in Fe-rich structural materials were investigated by means of ab initio supercell calculations based on the density-functional theory.
Journal ArticleDOI
Hydrogen embrittlement of ferritic steels: Observations on deformation microstructure, nanoscale dimples and failure by nanovoiding
TL;DR: In this article, fracture surface features were studied and compared using high-resolution surface-sensitive scanning electron microscopy, and the deformation microstructures just beneath the fracture surfaces were studied using transmission electron microscope, providing a mechanistic view of failure catalyzed by hydrogen.
Journal ArticleDOI
Hydrogen enhances strength and ductility of an equiatomic high-entropy alloy
Hong Luo,Zhiming Li,Dierk Raabe +2 more
TL;DR: In this article, the authors show that hydrogen in an equiatomic CoCrFeMnNi high-entropy alloy leads not to catastrophic weakening, but instead increases both, its strength and ductility.
References
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