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Toward the development of Mg alloys with simultaneously improved strength and ductility by refining grain size via the deformation process

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International Journal of Minerals,Metallurgy and Materials 2021年第1期28卷 30-45页

作者： Zhi zhang jing-huai zhang Jun Wang Ze-hua Li Jin-shu Xie Shu-juan Liu Kai Guan Rui-zhi Wu Key Laboratory of Superlight Material and Surface Technology Ministry of EducationCollege of Material Science and Chemical EngineeringHarbin Engineering UniversityHarbin 150001China Ningbo Branch Ordnance Science Institute of ChinaNingbo 315103China Department of Materials Physics and Chemistry Harbin Institute of TechnologyHarbin 150001China

Magnesium(Mg) alloys, as the lightest metal engineering materials, have broad application ***, the strength and ductility of traditional Mg alloys are still relativity low and difficult to improve *** grain size via the deformation process based on the grain boundary strengthening and the transition of deformation mechanisms is one of the feasible strategies to prepare Mg alloys with high strength and high *** this review, the effects of grain size on the strength and ductility of Mg alloys are summarized, and fine-grained Mg alloys with high strength and high ductility developed by various severe plastic deformation technologies and improved traditional deformation technologies are *** some achievements have been made, the effects of grain size on various Mg alloys are rarely discussed systematically and some key mechanisms are unclear or lack direct microscopic *** review can be used as a reference for further development of high-performance fine-grained Mg alloys.

关键词： magnesium alloys grain refinement high strength high ductility deformation process

Microstructure and mechanical properties of high-strength high-pressure die-cast Mg–4Al–3La–1Ca–0.3Mn alloy

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Rare Metals 2021年第10期40卷 2956-2963页

作者： Peng-Fei Qin Qiang Yang Yu-Ying He jing-huai zhang Jin-Shu Xie Xi-Ru Hua Kai Guan Jian Meng Key Laboratory of Superlight Materials and Surface Technology Ministry of EducationHarbin Engineering UniversityHarbin 150001China State Key Laboratory of Rare Earth Resource Utilization Changchun Institute of Applied ChemistryChinese Academy of SciencesChangchun 130022China Department of Materials Science and Engineering University of TokyoTokyo 113-8654Japan

A new high-pressure die-cast(HPDC) Mg–4 Al–3 La–1 Ca–0.3 Mn(ALaX431) alloy with high strength has successfully been fabricated. This HPDC alloy in peakaged state exhibits tensile yield strength(TYS) of 220 MPa at room temperature and TYS of 145 MPa at 250 ℃,higher than the corresponding strength of HPDC Mg alloys reported so far. These high strengths are mainly due to the formation of fine grained structure, semi-continuous reticular structure consisting of stable Al_(3)La and(Mg,Al)2 Ca particles along grain boundaries and numerous nanoscale Al_(2)Ca precipitates within grains. Due to its higher strength than existing HPDC Mg alloys, the new developed alloy has great application potential.

关键词： Magnesium alloys High-pressure die-cast Mechanical property Intermetallic phase

Evolutions of Microstructure and Mechanical Properties in Mg-5Li-1Zn-0.5Ag-0.5Zr-xGd Alloy

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Acta Metallurgica Sinica(English Letters) 2023年第2期36卷 215-228页

作者： Bing-Yu Qian Rui-Zhi Wu Jian-Feng Sun jing-huai zhang Le-Gan Hou Xiao-Chun Ma Jia-Hao Wang Hai-Ting Hu Key Laboratory of Superlight Materials&Surface Technology Ministry of EducationHarbin Engineering UniversityHarbin150001China College of Materials Science and Engineering Heilongjiang University of Science and TechnologyHarbin150022China

The evolution of the microstructure and mechanical properties of alloy system with nominally composition Mg-5Li-1Zn-0.5Ag-0.5Zr-xGd(x=0,1.2,2.4,3.6,4.8,6)is evaluated based on computational phase diagram and corresponding experimental *** results show that grains are significantly refined with the increase of Gd *** main phases of as-cast alloys areα-Mg,β-Li,AgLi_(2)Mg,and Mg_(3)*** the increase of Gd content,the amounts of Mg_(3)Gd phase andβ-Li phase have been *** the Gd content exceeds 3.6 wt%,Mg_(3)Gd phase precipitates in a form of the network at the grain *** precipitation ofβ-Li can be attributed to the competitive dissolution of Zn,Gd,and Li in ***,γ″is formed after the addition of Gd,which grows and transforms intoγ′with the increase of Gd *** solidification process,stacking faults are formed by solid transformation of partialα-Mg and Mg_(3)***,with the synergistic effect of Mg_(3)Gd,β-Li,andγ″(orγ′),as the Gd content increasing,the tensile strength of the alloy first increases,then decreases,and the elongation *** the content of Gd is 4.8 wt%,the ultimate tensile strength and yield strength reach the maximum values of 227 MPa and 139 MPa,and the elongation is 18.1%,respectively.

关键词： Mg-Li-Zn-Gd alloy Phase diagram Microstructure evolution Mechanical properties

Microstructure Evolution of Extruded Mg-6Gd Alloy Under 175 ℃ and 150 MPa

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Acta Metallurgica Sinica(English Letters) 2019年第2期32卷 245-252页

作者： Rong-Guang Li Farhan Asghar jing-huai zhang Guang-Yan Fu Qun Liu Bei-Tao Guo Yong-Mei Yu Shu-Guo Guo Yong Su Xue-Jiao Chen Lin Zong School of Mechanical Engineering Shenyang University of Chemical Technology Key Laboratory of Superlight Material and Surface Technology Ministry of Education College of Material Science and Chemical Engineering Harbin Engineering University

The tensile creep behavior of extruded Mg-6 Gd alloy,having the tensile yield strength of～ 110 MPa at 175 ℃,has been investigated under 175 ℃ and 150 MPa. In this study, the extruded Mg-6 Gd sample exhibits the total tensile strain of ～10.5% after the creep time of 1100 h,and the fast plastic strain of ～4.6% at the beginning of the creep test. The microstructure result suggests that the dislocation deformation is the main deformation mode during creep, and the grains with orientation close to(0001) II ED disappear after creep. The creep process containing a low creep strain has no effective promotion for the precipitation compared with the aging process without strain. The origination of creep crack is related to the formation of precipitate-free zone during creep. The work offers an important implication to research the microstructure evolution under an applied stress in a weak aging response Mg alloy.

关键词： Mg–Gd alloy Texture Creep Precipitates Crack

Recent advances of electromagnetic interference shielding Mg matrix materials and their processings:A review

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Transactions of Nonferrous Metals Society of China 2022年第5期32卷 1385-1404页

作者： Jia-hao WANG Rui-zhi WU jing FENG jing-huai zhang Le-gan HOU Mei-duo LIU Key Laboratory of Superlight Materials&Surface Technology Ministry of EducationHarbin Engineering UniversityHarbin 150001China College of Science Heihe UniversityHeihe 164300China Department of Environmental Engineering Heilongjiang University of TechnologyJixi 158100China

In terms of lightweight electromagnetic interference(EMI)shielding structural materials,Mg matrix materials have proven to be the best,due to their exciting properties(*** density,high specific strength,good electrical conductivity and excellent EMI shielding properties)and their wide range of applications in lightweighting in electronics,automotive and aerospace *** processing,such as alloying,heat treatment,plastic deformation and composite processing,Mg matrix materials can be obtained with tailorable properties which can play a key role in designing materials for EMI *** work introduces an overview of the research on the EMI shielding properties of Mg matrix materials as well as their EMI shielding mechanisms over the past few decades,focused on the influence of alloying,heat treatment,plastic deformation and composite processing for the EMI shielding properties of Mg matrix *** the end,conclusions and future perspectives are provided.

关键词： magnesium electromagnetic interference shielding alloying heat treatment plastic deformation composite processing

High specific strength MWCNTs/Mg-14Li-1Al composite prepared by electrophoretic deposition, friction stir processing and cold rolling

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Transactions of Nonferrous Metals Society of China 2022年第12期32卷 3914-3925页

作者： Lin XU Jia-hao WANG Rui-zhi WU Chun-bo zhang Hua-jie WU Le-gan HOU jing-huai zhang Key Laboratory of Superlight Materials&Surface Technology Ministry of EducationHarbin Engineering UniversityHarbin 150001China College of Science Heihe UniversityHeihe 164300China Harbin Welding Institute Limited Company Harbin 150001China

Multi-wall carbon nanotubes reinforced Mg-14Li-1Al composite(MWCNTs/Mg-14Li-1Al) was prepared by the processes of electrophoretic deposition, friction stir processing, and cold rolling. The microstructure and mechanical properties of the composite were investigated. The results show that, the microhardness of the composite is up to HV 84.4, which is 91.38% higher than that of the as-cast matrix alloy(HV 44.1). The yield strength and ultimate tensile strength of the composite are 259 and 313 MPa, which are 135.45% and 115.86% higher than those of the as-cast matrix alloy, respectively, and a high specific strength of 221.98 k N·m/kg is obtained. In the composite, the MWCNTs serve as nucleation particles during the friction stir processing and cold rolling, causing dynamic recrystallization and grain refinement. Furthermore, MWCNTs hinder the movement of dislocations and transfer the load from the matrix alloy, thus improving the strength.

关键词： metal matrix composites Mg-Li alloy multi-wall carbon nanotubes electrophoretic deposition friction stir processing rolling strengthening mechanism

Highly conductive and stable iodine doped argyrodite electrolyte for all-solid-state lithium batteries

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Journal of Energy Chemistry 2025年第1期100卷 50-58页

作者： Gaozhan Liu jing zhang jing Yang jinghui Chen Xingyue Xiao Xiayin Yao Ningbo Institute of Materials Technology and Engineering Chinese Academy of Sciences Center of Materials Science and Optoelectronics Engineering University of Chinese Academy of Sciences

Lithium argyrodites with high ionic conductivity and low cost are considered as one of the most prospective solid electrolytes for all-solid-state lithium ***,the poor chemical stability and compatibility with lithium metal limit their ***,Li5.4PS4.4Cl1.4I0.2solid electrolyte with high ionic conductivity of 11.49 m S cm-1and improved chemical stability is synthesized by iodine *** ultra-thin Li5.4PS4.4Cl1.4I0.2membrane with thickness of 10μm can be obtained by wet coating process,exhibiting a high ionic conductivity of 2.09 mS cm-1and low areal resistance of 1.17Ω***,iodine doping could in-situ form LiI at the lithium/electrolyte interface and improve the critical current density of Li5.4PS4.4Cl1.6from 0.8 to 1.35 mA *** resultant LiCoO2/Li5.4PS4.4Cl1.4I0.2/Li battery shows excellent cycling stability at 1 C,with a reversible specific capacity of 110.1 mA h g-1and a retention of 80.5% after 1000 *** addition,the assembled LiCoO2/Li5.4PS4.4Cl1.4I0.2membrane/Li pouch cell delivers an initial discharge capacity of 110.4 mA h g-1and 80.5% capacity retention after 100 cycles.

关键词： Argyrodite electrolytes Iodine doping Ionic conductivity Stability All-solid-state lithium battery

Dielectric-ion-conductive ZnNb2O6 layer enabling rapid desolvation and diffusion for dendrite-free Zn metal batteries

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Journal of Energy Chemistry 2025年第1期100卷 693-701页

作者： Haifeng Yang Jian Wang Panpan zhang Xiaomin Cheng Qinghua Guan jing Dong Bixian Chen Lujie Jia jing zhang Yongzheng zhang Yunjian Liu Hongzhen Lin School of Materials Science and Engineering Jiangsu University i-Lab & CAS Key Laboratory of Nanophotonic Materials and Devices Suzhou Institute of Nano-Tech and Nano-Bionics Chinese Academy of Sciences Helmholtz Institute Ulm (HIU) Karlsruhe Institute of Technology (KIT) School of Materials Science and Engineering Xi'an University of Technology State Key Laboratory of Chemical Engineering East China University of Science and Technology

Rechargeable aqueous zinc-metal batteries （AZMBs） are promising candidates for large-scale energy storage systems due to their low cost and high ***,their performance and sustainability are significantly hindered by the sluggish desolvation kinetics at the electrode/electrolyte interface and the corresponding hydrogen evolution reaction where active water molecules tightly participate in the Zn（H2O）62+solvation ***,learnt from self-generated solid electrolyte interphase （SEI） in anodes,the dielectric but ion-conductive zinc niobate nanoparticles artificial layer is constructed on metallic Zn surface （ZNB@Zn）,acting as a rapid desolvation *** zincophilic and dielectric-conductive properties of ZNB layer accelerate interfacial desolvation/diffusion and suppress surface corrosion or dendrite formation,achieving uniform Zn plating/stripping behavior,as confirmed by electronic/optical microscopies and interface spectroscopical measurements together with theoretical ***,the as-prepared ZNB@Zn electrode exhibits excellent cycling stability of over 2000 h and robust reversibility （99.54%） even under high current density and depth of discharge ***,the assembled ZNB@Zn-based full cell displays high capacity-retention rate of 80.21%after 3000 cycles at 5 A g-1and outstanding rate performance up to 10 A *** large-areal pouch cell is stabilized for hundreds of cycles,highlighting the bright prospects of the dielectric but ion-conductive layer in further application of AZMBs.

关键词： Zn metal battery Dielectric artificial layer Rapid ion diffusion Zincophilic diffusion Active water inhibition

Transfer RNA-derived small RNA serves as potential non-invasive diagnostic marker and a novel therapeutic target for acute pancreatitis

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World Journal of Gastroenterology 2025年第1期31卷 152-156页

作者： jing zhang Chun-Lin Ou Department of Immunology School of Basic MedicineCentral South UniversityChangsha 410000Hunan ProvinceChina Department of Pathology Xiangya HospitalCentral South UniversityChangsha 410008Hunan ProvinceChina

Transfer RNA(tRNA)-derived fragments,a new type of tRNA-derived small RNA(tsRNA),can be cleaved from tRNA by enzymes to regulate target gene expression at the transcriptional and translational *** are not only degradation fragments but also have biological functions,including those in immune inflammation,metabolic disorders,and cell *** dysregulation is closely associated with multiple diseases,including various cancers and acute pancreatitis(AP).AP is a common gastrointestinal disease,and its incidence increases *** development is associated with tsRNAs,which regulate cell injury and induce inflammation,especially pyroptosis and ***,serum tRF36 has the potential to serve as a non-invasive diagnostic biomarker and leads to pancreatic acinar cell ferroptosis causing inflammation to promote *** show the characteristics of tsRNAs and their diagnostic value and function in AP,and discuss the potential opportunities and challenges of using tsRNAs in clinical applications and research.

关键词： Transfer RNA derived small RNAs Acute pancreatitis Liquid biopsy Biomarker Cell pyroptosis Ferroptosis