Results 31 to 40 of about 41,725 (261)

Karl Popper and the Mechanisms of Hydrogen Embrittlement

Advanced Engineering Materials, EarlyView.
Representation of the beginning of loss of ductility rather than embrittlement. Small concentrations of hydrogen in a diffusible form within iron are well‐established to harm the mechanical integrity of steels. There are theories that attempt to explain the pernicious role of hydrogen.
H. K. D. H. Bhadeshia
wiley   +1 more source

A method on hydrogen permeation measurement through steel under constant tensile stress

International Journal of Electrochemical Science, 2017
Hydrogen permeation behavior was studied by many researchers, uniaxial tensile stress may affect the behavior due to the deformation of specimen. However, less study focused on hydrogen permeation behavior during Slow Strain Rate Test (SSRT). In order to
Guo Yi
doaj   +1 more source

Hydrogen‐Assisted Fracture of Iron‐Based Fe–Ni–Al Alloys

Advanced Engineering Materials, EarlyView.
Principal relations and fracture mechanisms of single‐phase and precipitate‐strengthened Fe–Ni–Al alloys subjected to prior electrochemical hydrogen charging are identified. The mechanisms of hydrogen effect on strength and microhardness are discussed, including hydrogen‐induced increase in microhardness and the role of hydrogen in fracture behavior ...
Nataliya Yadzhak, Olha Zvirko, Rostyslav Leshchak, Hryhoriy Nykyforchyn   +3 more
wiley   +1 more source

Numerical simulation by finite element modelling of diffusion and transient hydrogen trapping processes in plasma facing components

Nuclear Materials and Energy, 2019
In order to simulate hydrogen charging and discharging cycles of mechanically loaded structures full 3D Macroscopic Rate Equation (MRE) modelling is proposed based on a finite element method (FEM).
S. Benannoune, Y. Charles, J. Mougenot, M. Gaspérini, G. De Temmerman   +4 more
doaj   +1 more source

Molecular Dynamics Studies of Shape Memory Polymers: From Bead–Spring Models to Atomistic Simulations

Advanced Engineering Materials, EarlyView.
Coarse‐grained (left) and atomistic (right) models of the shape memory polymer ESTANE ETE 75DT3 are shown schematically. The two representations bridge molecular detail and mesoscopic description. Both models capture shape memory behavior, linking segmental mobility and conformational relaxation of anisotropic chains to macroscopic recovery, and ...
Fathollah Varnik
wiley   +1 more source

Role of NbC in enhancing hydrogen embrittlement resistance of the ferritic steels

Journal of Materials Research and Technology
Hydrogen trapping at the NbC precipitates and its effects on the mechanical properties of the ferritic steels were investigated through combining experimental studies and theoretical modeling. Thermal desorption spectroscopy (TDS) verifies that ∼5 nm NbC
Zemin Xu, Lin Cheng, Kai Xia, Chengyang Hu, Kaiming Wu   +4 more
doaj   +1 more source

Molecular dynamics simulations of hydrogen isotope exchange in tungsten vacancies

Nuclear Materials and Energy, 2021
Solute hydrogen can cause many damaging processes in the lattices of metals, such as deformation of the material, which can take place in large scales through blistering and embrittlement.
O. Lindblom, T. Ahlgren, K. Heinola
doaj   +1 more source

Superlubricity and Corrosion Inhibition Properties of Solvate Ionic Liquids in Hybrid Carbon Fiber Reinforced Plastic–Steel Interfaces

Advanced Engineering Materials, EarlyView.
Solvate ionic liquids lubrication reduced the coefficient of friction by ∼60% compared to dry sliding, reaching steady‐state values as low as 0.04–0.05. Corrosion weight‐loss measurements in 1 M HCl further demonstrated significant inhibition behavior, with only 100 ppm of [Li(G3)][TFSI] (∼68.5 μL/L) reducing corrosion‐product weight loss by 63 ...
Sameh Dabees, Timothy Harte, Bhagya Dharmasiri, Y. Athulya Wickramasingha, David J. Hayne, Daniel J. Eyckens, Luke C. Henderson   +6 more
wiley   +1 more source

Trapping and de-trapping behavior of hydrogen isotopes in <100> interstitial dislocation loops of tungsten

Nuclear Fusion
In fusion reactors, plasma-facing materials (PFMs) work under a complex irradiation environment. A lot of irradiation defects will be generated in tungsten (W), primary candidate for PFMs, leading to a substantial amount of hydrogen fuel retention. Among
Fei Sun, Qihang Liu, Baichuan Xu, Xiao-Chun Li, Jipeng Zhu, Dahuan Zhu, Hai-Shan Zhou, Hongxiang Zong, Lai-Ma Luo, Yasuhisa Oya, Yucheng Wu   +10 more
doaj   +1 more source

Evaluation of hydrogen concentration in high strength steel by using finite element method

Nihon Kikai Gakkai ronbunshu, 2017
In order to compute hydrogen concentration distribution under mechanical loading, a stress-hydrogen diffusion or distribution coupling computing method had been developed based on Oriani’s theory. In this theory, it is assumed that hydrogen concentration
Takashi ASADA, Gaku KITAHARA, Tomohiro SUZUKI, Aya TSUJI   +3 more
doaj   +1 more source