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Interactions between Pre-strain and Dislocation Structures and Its Effect on the hydrogen trapping Behaviors

Acta Metallurgica Sinica(English Letters) 2023年第7期36卷 1193-1202页

作者： Rongjian Shi Yanqi Tu Liang Yang Saiyu Liu Shani Yang Kewei Gao Xu-Sheng Yang Xiaolu Pang Beijing Advanced Innovation Center for Materials Genome Engineering School of Materials Science and EngineeringUniversity of Science and Technology BeijingBeijing100083China School of Mathematics and Physics University of Science and Technology BeijingBeijing100083China Department of Industrial and Systems Engineering The Hong Kong Polytechnic UniversityHung HomKowloonHong KongChina Hong Kong Polytechnic University Shenzhen Research Institute Shenzhen518057China Key Laboratory for Advanced Materials of Ministry of Education School of Materials Science and EngineeringTsinghua UniversityBeijing100084China

This work investigated the effect of pre-strain and microstructures and their interactions on hydrogen trapping behaviors in case of 1-GPa high-strength martensitic steel Fe-0.05C-0.30Si-1.10Mn-3.50Ni-0.53Cr-0.50Mo-0.03 V(wt%).We found that the trapped reversible and trapped irreversible hydrogen contents increased significantly after applying a pre-strain of 5%,with an increase in the trapped reversible hydrogen content from 0.6 ppm in the original sample to 2.1 *** hydrogen desorption activation energy also showed a slight *** microstructural evolution revealed that the concomitant dislocation cell-twin duplex microstructure with high-density tangled dislocations after pre-strain substantially increased the trapped reversible hydrogen ***,the tangled dislocations pinned by the nanoprecipitates acted as deep irreversible hydrogen traps,increasing the trapped hydrogen at high temperatures after applying 5%*** findings provide an expanded understanding of the hydrogen trapping behaviors of pre-strained microstructures.

关键词： hydrogen embrittlement hydrogen trapping Pre-strain Deformed microstructure High-strength steel

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Ab Initio Investigations for the Role of Compositional Complexities in Affecting hydrogen trapping and hydrogen Embrittlement:A Review

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Acta Metallurgica Sinica(English Letters) 2023年第7期36卷 1159-1172页

作者： Boning Zhang Yong Mao Zhenbao Liu Jianxiong Liang Jun Zhang Maoqiu Wang Jie Su Kun Shen Advanced Computing Center School of Materials and EnergyYunnan UniversityKunming650091China Institute for Special Steel Research Central Iron and Steel Research InstituteBeijing100081China Key Laboratory of Advanced Materials of Ministry of Education School of Materials Science and EngineeringTsinghua UniversityBeijing100084China School of Science China University of GeosciencesBeijing100083China

ydrogen embrittlement(HE)seriously restricts the service safety of structural metallic materials applicate in aerospace,ocean,and *** studies aiming at increasing the HE-resistance have been focusing on trapping diffusible H atoms by inherent microstructural features in ***-induced compositional complexities,including different types of solute atoms,lattice chemical heterogeneities,and carbide precipitates,have attracted research efforts regarding the H trapping capabilities and potential to reduce the susceptibility to *** this paper,we review recent progress in exploiting compositional complexities to regulate the hydrogen trapping characteristics and mechanical properties in H-containing *** focus is placed on results and insights from ab initio calculations based on density functional theory(DFT).Quantitative predictions of trapping parameters and atomic scale details that are hardly to be gained through traditional experimental characterizations are ***,we overview the electronic/atomistic mechanisms of H trapping energetics in metallic ***,we propose some key challenges and prospects in simulation of defect interactions,interpretation of experimental characterizations,and developing microstructure-based H diffusion prediction *** the applications of first principle calculations,we illustrate how the DFT data can complement experimental characterizations to guide composition and microstructure design for better HE-resistant materials.

关键词： Ab initio calculations hydrogen trapping hydrogen embrittlement Precipitation Composition design

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hydrogen trapping Phenomenon at Grain Boundaries in a 18Ni Maraging Steel

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Journal of Materials Science & Technology 1990年第3期6卷 200-205页

作者：姚大平陈文绣 Institute of Metal Research Academia Sinica Wenhua Rd.Shenyang110015China

An investigation of the phenomenon of hydrogen trapping at grain boundaries in 18 Ni maraging steel has been carried out by the thermal hydrogen evolution *** boundary on- ly acts as a trapping site of hydrogen at low temper- ature region,and the peak of its hydrogen evolution from it is observed at 405K with 3.00K/rain heat- ing rate and with specimen of 0.55mm *** trap activation energy of hydrogen escaped from grain boundary is estimated as 14.2kJ/mol. hydrogen trapping at grain boundary is mainly as sociated with segregated hydrogen by impurities, and its behaviour is primarily the interaction be- tween hydrogen and the hydrostatic stress field of the grain boundary.

关键词： hydrogen trapping grain boundary maraging steel

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hydrogen trapping by Dislocations and Grain Boundaries in Fe-3%Si AHoy

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Journal of Materials Science & Technology 1993年第5期9卷 385-387页

作者： Yuandong DIAO Shenyang Institute of Chemical Technology,Shenyang,110021,ChinaMingzhou CAO Xiaojing WAN Institute of Metal Research,Academia Sinica,Shenyang,110015,China

In present work,Fe-3%Si alloy specimens with various degrees of cold working and various grain sizes were chosen to determine the effect of cold working and grain sizes on the hydrogen diffusivities by electrochemical... 详细信息

关键词： hydrogen trapping dislocation grain boundary

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Analysis of hydrogen Diffusion in Metals with trapping under Local Equilibrium Assumption

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Journal of Materials Science & Technology 1990年第3期6卷 162-166页

作者：杨柯曹明洲万晓景师昌绪 Institute of Metal Research.Academia Sinica Shenyang110015China. Shanghai University of Technology.Shanghai 200070China.

The assumption of the local equilibrium of hydrogen distribution in metals[1]was used in the model formerly developed[2]to describe the diffu- sion of hydrogen in *** the assumption a direct relationship between the hydrogen diffusivity and the hydrogen concentration in metals is estab- lished as D=D_o/{1+N_x(k/p)/[1+C(k/p)]} The comparison between the two results drawn from the assumption of equilibrium and the dynam- ics of hydrogen trapping[3]was also *** computation results well explained the scattering phenomenon existed in hydrogen diffusion data and suggested that the experimental conditions should be identical for the study of hydrogen permeation in metals.

关键词： diffusion hydrogen trapping local equilibrium

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hydrogen Embrittlement of Advanced High-Strength Steel for Automobile Application:A Review

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Acta Metallurgica Sinica(English Letters) 2023年第7期36卷 1144-1158页

作者： Ming-Tu Ma Ke-Jian Li Yu Si Peng-Jun Cao Hong-Zhou Lu Ai-Min Guo Guo-Dong Wang State Key Laboratory of Vehicle NVH and Safety Technology Chongqing 401122China China Automotive Engineering Research Institute Co. Ltd.Chongqing 401122China School of Metallurgy and Materials Engineering Chongqing University of Science&TechnologyChongqing 401331China CITIC Metal Co.Ltd Beijing 100004China RAL of Dongbei University Shenyang 110819China

The hydrogen embrittlement(HE)fracture of advanced high-strength steels used in lightweight automobiles has received increasing public *** source,transmission,and movement of hydrogen,characterization parameters,and test methods of HE,as well as the characteristics and path of HE fractures,are *** mechanisms and modes of crack propagation of HE and hydrogen-induced delayed fracture are *** recent progress surrounding micro and macro typical fracture characteristics and the influencing factors of HE are ***,methods for improving HE resistance can be summarized as follows:(1)reducing crystalline grain and inclusion sizes(oxides,sulfides,and titanium nitride),(2)controlling nano-precipitates(niobium carbide,titanium carbide,and composite precipitation),and(3)increasing residual austenite content under the reasonable tension strength of steel.

关键词： hydrogen embrittlement High-strength steel hydrogen-induced delayed cracking hydrogen trapping Residual austenite

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New Nanocomposite Materials by Incorporation of Nanocrystalline TiO_2 Particles into Polyaniline Conductive Films

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Journal of Materials Science & Technology 2014年第5期30卷 449-454页

作者： F.J.Feliciano O.C.Monteiro Department of Chemistry and Biochemistry and CQB Faculty of SciencesUniversity of LisbonCampo Grande1749-016 LisbonPortugal

This work is focused on the combination of two building-blocks, nanocrystalline TiO2 particles and polyaniline conductive films （PAni）. The preparation of new nanostructured composite materials, displaying electron- and proton-conductive properties, to be used for the fabrication of new and superior energy storage devices was envisaged. The semiconducting TiO2 nanoparticles were obtained by means of a hydrothermal route. The PAni films were prepared on glassy carbon electrodes by electrochemical polymerization, under potential dynamic conditions. After characterization by X-ray diffraction, transmission electron microscopy or scanning electron microscopy and electrochemical techniques, the nanocrystalline particles were immobilized in the polymer matrix. The incorporation of the TiO2 was achieved using two distinct approaches： during the polymer growth or by deposition over previously prepared PAni films. The results demonstrate that the PAni morphology depends on the experimental conditions used during the polymer growth. After TiO2 immobilization, the best electrochemical response was obtained for the nanocomposite structure produced through the TiO2 incorporation after the PAni film synthesis. The modified electrodes were structurally and morphologically characterized and their electro-catalytic activity towards the hydrogen evolution reaction was analyzed. A new electrochemical performance related with the oxidation of molecular hydrogen entrapped in the PAni-TiO2 matrix was observed for the modified electrode after TiO2 incorporation. This behavior can be directly associated with the synergetic combination of the TiO2 and PAni, and is dependent on the amount of the semiconductor.

关键词： PolyaniHne (PAni) Nanosized TiO2 Nanocomposites hydrogen trapping

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A Strategy of Avoiding Delayed Fracture in Ultrahigh Strength Automotive Steels by Nb Microalloying

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Journal of Iron and Steel Research International 2011年第S1期18卷 893-897页

作者： Hardy Mohrbacher NiobelCon bvba 2970 SchildeBelgium

Recently the automotive industry has been confronted with the phenomenon of delayed *** phenomenon was not relevant in earlier years since the strength level of the steels was generally below a critical ***,delayed fracture is not necessarily related to an absolute strength value but rather to microstructural features as well as pre-existing micro-damage in the material that are likely to occur in ultrahigh strength *** microalloying in combination with appropriate processing can effectively help to improve the resistance against delayed fracturing in such *** paper outlines a strategy how to achieve this based on microstructural control and hydrogen trapping.

关键词： delayed fracture niobium microalloying grain refinement hydrogen trapping molybdenum alloying

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hydrogen Storage Performance During Underground hydrogen Storage in Depleted Gas Reservoirs:A Review

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Engineering 2024年第9期40卷 211-225页

作者： Lingping Zeng Regina Sander Yongqiang Chen Quan Xie CSIRO Energy MelbourneVIC 3168Australia hydrogen Industry Mission CSIROMelbourneVIC 3168Australia CSIRO Energy KensingtonWA 6151Australia Permanent Carbon Locking Future Science Platform CSIRO EnergyKensingtonWA 6151Australia WA School of Mines:Minerals Energy and Chemical EngineeringCurtin UniversityKensingtonWA 6151Australia

hydrogen has emerged as a promising alternative to meet the growing demand for sustainable and renewable energy *** hydrogen storage(UHS)in depleted gas reservoirs holds significant potential for large-scale energy storage and the seamless integration of intermittent renewable energy sources,due to its capacity to address challenges associated with the intermittent nature of renewable energy sources,ensuring a steady and reliable energy *** the existing infrastructure and well-characterized geological formations,depleted gas reservoirs offer an attractive option for large-scale hydrogen storage ***,significant knowledge gaps regarding storage performance hinder the commercialization of UHS *** deliverability,hydrogen trapping,and the equation of state are key areas with limited *** literature review critically analyzes and synthesizes existing research on hydrogen storage performance during underground storage in depleted gas reservoirs;it then provides a high-level risk assessment and an overview of the techno-economics of *** significance of this review lies in its consolidation of current knowledge,highlighting unresolved issues and proposing areas for future *** these gaps will advance hydrogen-based energy systems and support the transition to a sustainable energy *** efficient and safe deployment of UHS in depleted gas reservoirs will assist in unlocking hydrogen’s full potential as a clean and renewable energy *** addition,this review aids policymakers and the scientific community in making informed decisions regarding hydrogen storage technologies.

关键词： Underground hydrogen storage Storage performance hydrogen deliverability hydrogen trapping Risk assessment Techno-economic analysis

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