Results 21 to 30 of about 195,327 (256)

Hydrogen-Induced Cracking in CGHAZ of Welded X80 Steel under Tension Load

Metals, 2023
X80 steel is extensively used in hydrogen environments and is susceptible to hydrogen embrittlement (HE). This paper studied the hydrogen-induced cracking (HIC) behavior in the coarse-grained heat-affected zone (CGHAZ) of X80 steel welds, through ...
Jinxin Gou, Xiao Xing, Gan Cui, Zili Li, Jianguo Liu, Xiangyuan Deng   +5 more
doaj   +1 more source

Hydrogen Diffusion Mechanism around a Crack Tip in Type 304L Austenite Stainless Steel Considering the Influence of the Volume Expansion of Strain-Induced Martensite Transformation

Metals, 2019
Strain-induced martensite transformation (SIMT) commonly exists around a crack tip of metastable austenite stainless steels. The influence of the volume expansion of the SIMT on the hydrogen diffusion was investigated by hydrogen diffusion modeling ...
Zhiliang Xiong, Wenjian Zheng, Yanzhang Liu, Yanjun Kuang, Jianguo Yang   +4 more
doaj   +1 more source

Diffusion of Hydrogen Isotopes in Zirconium Alloys

He huaxue yu fangshe huaxue
Tritium is a common radioactive product in nuclear power plants. It is easy to diffuse, penetrate and be easily absorbed by organisms due to its small atomic radius.
Long WANG, Zhi-hao HONG, You-zhi WANG, Zi-kai LIU, Xiao-qian ZHANG, Tian-guang ZHANG, Long ZHANG   +6 more
doaj   +1 more source

Research on Hydrogen Leakage Risk Control Methods in Deck Compartments of Hydrogen Fuel Cell-Powered Ships Based on CFD Simulation and Ventilation Optimization

Fire
Hydrogen fuel cell vessels represent a vital direction for green shipping, but the risk of large-scale hydrogen leakage and diffusion in their enclosed compartments is particularly prominent. To enhance safety, a simplified three-dimensional model of the
Xiaoyu Liu, Jie Zhu, Zhongcheng Wang, Zhenqiang Fu, Meirong Liu   +4 more
doaj   +1 more source

Effect of Microstructure on Hydrogen Permeation in EA4T and 30CrNiMoV12 Railway Axle Steels

Metals, 2019
A comparative study was conducted to reveal the effect of microstructure on hydrogen permeation in the EA4T and 30CrNiMoV12 railway axle steels. Unlike the EA4T with its sorbite structure, 30CrNiMoV12 steel shows a typical tempered martensitic structure,
Tingzhi Si, Yunpeng Liu, Qingan Zhang, Dongming Liu, Yongtao Li   +4 more
doaj   +1 more source

Research on Hydrogen/Deuterium Permeation Behavior and Influencing Factors of X52MS Pipeline Steel

Metals
The hydrogen/deuterium permeation behavior of X52MS pipeline steel with three thicknesses was investigated using the gas/liquid phase permeation method by changing the current density and regulating the surface roughness.
Ning Liu, Ke Jin, Junqiang Ren, Jie Sheng, Xuefeng Lu, Xingchang Tang   +5 more
doaj   +1 more source

Structural insights into an engineered feruloyl esterase with improved MHET degrading properties

FEBS Letters, EarlyView.
A feruloyl esterase was engineered to mimic key features of MHETase, enhancing the degradation of PET oligomers. Structural and computational analysis reveal how a point mutation stabilizes the active site and reshapes the binding cleft, expading substrate scope.
Panagiota Karampa, Konstantinos Makryniotis, Theofani‐Iosifina Sousani, Evangelos Topakas, Vangelis Daskalakis, Maria Dimarogona   +5 more
wiley   +1 more source

A Numerical Study of the Leakage and Diffusion Behavior of Hydrogen Dispensers in Hydrogen Refueling Stations Under Different Leakage Conditions

Energies
The investigation of hydrogen leakage and diffusion behavior is of great importance for the assessment of safety risks and the establishment of safety regulations for hydrogen refueling stations.
Lei Zhang, Zhixiang Duan, Rui Ding, Cuiwei Liu   +3 more
doaj   +1 more source

Hydrogen Desorption from Mg Hydride: An Ab Initio Study

Crystals, 2012
Hydrogen desorption from hydride matrix is still an open field of research. By means of accurate first-principle molecular dynamics (MD) simulations an Mg–MgH2 interface is selected, studied and characterized.
Simone Giusepponi, Massimo Celino
doaj   +1 more source

Hydrogen diffusion on Si(001)

Physical Review B, 1996
We have imaged hydrogen on Si~001! at low coverages in a variable-temperature STM from 300 K up to 700 K. Individual hydrogen atoms were imaged which became mobile at around 570 K. The observed rate of hopping along the dimer rows was consistent with an activation energy of 1.68 6 0.15 eV.
Owen, J, Bowler, DR, Goringe, C, Miki, K, Briggs, G   +4 more
openaire   +2 more sources