【摘 要】
：
Hydrogen dissolved in metals as a result of internal and external hydrogen can affect the mechanical properties of the metals,principally through the interactions between hydrogen and material defects.Multiple phenomena such as hydrogen dissolution,hydrog
【机 构】
：
Sino-French Institute of Nuclear Engineering and Technology, Sun Yat-sen University, Zhuhai 519082,C
论文部分内容阅读
Hydrogen dissolved in metals as a result of internal and external hydrogen can affect the mechanical properties of the metals,principally through the interactions between hydrogen and material defects.Multiple phenomena such as hydrogen dissolution,hydrogen diffusion,hydrogen redistribution and hydrogen interactions with vacancies,dislocations,grain boundaries and other phase interfaces are involved in this process.Consequently,several hydrogen embrittlement (HE) mechanisms have been successively proposed to explain the HE phenomena,with the hydrogen-enhanced decohesion mechanism,hydrogenenhanced localized plasticity mechanism and hydrogen-enhanced strain-induced vacancies being some of the most important.Additionally,to reduce the risk of HE for engineering structural materials in service,surface treatments and microstructural optimization of the alloys have been suggested.In this review,we report on the progress of the studies on HE in metals,with a particular focus on steels.It focuses on four aspects: (1) hydrogen diffusion behavior;(2) hydrogen characterization methods;(3) HE mechanisms;and (4) the prevention of HE.The strengths and weaknesses of the current HE mechanisms and HE prevention methods are discussed,and specific research directions for further investigation of fundamental HE mechanisms and methods for preventing HE failure are identified.
其他文献
Friction stir welding (FSW),a highly efficient solid-state joining technique,was invented at The Welding Institute,UK,in 1991.Utilizing frictional and adiabatic heating,plastic deformation and solid-state diffusion,FSW has been widely accepted as a “green
Magnesium (Mg) alloys as a bioabsorbable light metal have shown great clinical potential as bone replacement implants.In this review,the categories,progress in cutting-edge preparation technologies and antibacterial mechanisms of Mg alloys and considerabl
Electron beam melting (EBM) process is an additive manufacturing process largely used to produce complex metallic components made of high-performance materials for aerospace and medical applications.Especially,lattice structures made by Ti-6Al-4V have rep
This work investigates the corrosion behavior of AlSi 10Mg alloy produced by selective laser melting (SLM) and the counterparts heat-treated at 450-550 ℃ in 3.5 wt％ NaCl solution.Electrochemical measurements and weight loss tests together with microstruct
For the high transition temperature (Tc) and low cost taking both raw materials and fabrication process into account,MgB2 has been a competitive candidate to replace the conventional NiTi superconductor for high-temperature application in fault current li
Coherent second phase often exhibits anisotropic morphology with specific orientations with respect to both the second and the matrix phases.As a key feature of microstructure,the morphology of the coherent particles is essential for understanding the sec
Thin films of CdSe and silver (Ag)-doped CdSe have been prepared on glass substrates by thermal evaporation in argon gas atmosphere.X-ray diffraction pattern indicates the presence of hexagonal structure with preferred orientation along (100)plane.Element