Author
Aleksandar Sedmak
Other affiliations: Academy of Sciences of the Czech Republic, Drexel University
Bio: Aleksandar Sedmak is an academic researcher from University of Belgrade. The author has contributed to research in topics: Welding & Fracture mechanics. The author has an hindex of 18, co-authored 244 publications receiving 1577 citations. Previous affiliations of Aleksandar Sedmak include Academy of Sciences of the Czech Republic & Drexel University.
Papers published on a yearly basis
Papers
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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 paper, a damaged boiler tube made of grade 20 -St.20 (or 20G, equivalent to AISI 1020) was investigated, and the experimental research was conducted in two distinctive phases: failure analysis of the boiler evaporator tube sample and subsequent postmortem analysis of viable hydrogen embrittlement mechanisms (HE) in St.20 steel.
201 citations
TL;DR: In this article, a model for structural integrity analysis of boiler tubes made of plain carbon steel exposed during operation to a local corrosion is presented, which is used for predicting and preventing hydrogen embrittlement.
Abstract: Hydrogen embrittlement is a common, dangerous, and poorly understood cause of failure in many metal alloys. In practice, it is observed that different types of damage to industrial components have been tied to the presence and localization of hydrogen in metals. Many efforts have been made at understanding the effects of hydrogen on materials, resulting in an abundance of theoretical models and papers. However, a fully developed and practically-applicable predictive physical model still does not exist industrially for predicting and preventing hydrogen embrittlement. The connection of microstructure-based behaviors of materials and effects on the macroscopic measurable characteristics (stress levels, hardness, strength, and impact toughness) is of the utmost importance to achieve a unified model for hydrogen embrittlement. This paper gives an overview of the application of a model for structural integrity analysis of boiler tubes made of plain carbon steel exposed during operation to a local corrosion pro...
120 citations
TL;DR: In this article, structural, low carbon steel, for pressure purposes, grade 20 - St.20 (GOST 1050-88) was investigated, and the results indicated the simultaneous action of the hydrogenenhanced decohesion (HEDE) and hydrogen enhanced localized plasticity (HELP) mechanisms of HE, depending on the local concentration of hydrogen in investigated steel.
74 citations
62 citations
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TL;DR: In this paper, the authors focus on the following topics: (1) materials requirements in design of aircraft structures and engines, (2) recent advances in the development of aerospace materials, (3) challenges faced by recent aerospace materials and (4) future trends in aerospace materials.
477 citations
TL;DR: In this article, the authors deal with HE definition, mechanisms which causes HE, subcritical crack growth, the concentration of hydrogen measurement and prevention activities are discussed which act as a barrier for hydrogen diffusion.
308 citations
Journal Article•
289 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