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Fatigue failure analysis and heat treatment strategy optimization of torsion bar spring for automobile suspension system used in light vehicles

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Journal of Iron and Steel Research International 2025年第3期32卷 799-811页

作者： Jia-xing Liu Yong-jin Wu Chao-lei Zhang Wan-li Sun Wen-bin Ding Shuai-jun Dong Institute for Carbon Neutrality School of Materials Science and EngineeringUniversity of Science and Technology BeijingBeijing100083China State Key Laboratory for Advanced Metals and Materials University of Science and Technology BeijingBeijing100083China Institute of Steel Sustainable Technology Liaoning Academy of MaterialsShenyang110167LiaoningChina

The failure analysis was conducted on unqualified torsion bar spring in automobile suspension system used for light vehicles during engine *** effects of through hardening,surface induction hardening,quenching and tempering,and tempering temperature on the microstructure and fatigue life of 45CrNiMoVA steel torsion bars were also *** showed that only the torsion bar spring after through quenching and tempering is subjected to surface induction quenching and tempering to achieve the fatigue life of the qualified torsion *** fatigue life of torsion bar spring reaches 3×10^(5) cycles more than the required 2×10^(5) *** is because the distribution of gradient microstructure was helpful to relieve the applied stress during the fatigue *** microstructure of the non-hardened region,which consists of tempered sorbite regardless of whether it is tempered at 330 or 430℃,contributes to minimizing the impact of temper brittleness on the fatigue life of the torsion ***,the fatigue life of the torsion bar is relatively unaffected by temper brittleness due to the presence of tempered sorbite in its non-hardened *** the reason for the unqualified fatigue life was that the depth and hardness of the hardened region did not meet the standard requirements of 5–7 mm and 47–52 HRC,respectively.

关键词： Fatigue life Torsion bar Tempering temperature 45CrNiMoVA steel Fracture

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Electromagnetic wave absorption and corrosion resistance performance of carbon nanoclusters/Ce-Mn codoped barium ferrite composite materials

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International Journal of Minerals,Metallurgy and materials 2025年第3期32卷 699-709页

作者： Bo Li Lin Ma Sinan Li Jiewu Cui Xiaohui Liang Wei Sun Pengjie Zhang Nan Huang Song Ma Zhidong Zhang Shenyang National Laboratory for Materials Science Institute of Metal ResearchChinese Academy of SciencesShenyang 110016China School of Materials Science and Engineering University of Science and Technology of ChinaShenyang 110016China School of Metallurgy Engineering Liaoning Institute of Science and TechnologyBenxi 117004China School of Materials Science and Engineering Hefei University of TechnologyHefei 230009China Institute of Microelectronics Hangzhou Dianzi UniversityHangzhou 310018China BGRIMM Magnetic Materials&Technology Co. Ltd.Beijing 100160China

To realize the application of electromagnetic wave absorption(EWA)devices in humid marine environments,bifunctional EWA materials with better EWA capacities and anticorrosion properties have great exploration significance and systematic research *** utilizing the low-cost and excellent magnetic and stable chemical characteristics of barium ferrite(BaFe_(12)O_(19))and using the high dielectric loss and excellent chemical inertia of nanocarbon clusters,a new type of nanocomposites with carbon nanoclusters en-capsulating BaFe_(12)O_(19)was designed and synthesized by combining an impregnation method and a high-temperature calcination ***,Ce-Mn ions were introduced into the BaFe_(12)O_(19)lattice to improve the dielectric and magnetic properties of BaFe_(12)O_(19)cores significantly,and the energy band structure of the doped lattice and the orders of Ce replacing Fe sites were *** from Ce-Mn ion doping and carbon nanocluster encapsulation,the composite material exhibited excellent dual functionality of corrosion resist-ance and *** BaCe_(0.2)Mn_(0.3)Fe_(11.5)O_(19)-C(BCM-C)was calcined at 600°C,the minimum reflection loss of-20.1 dB was achieved at 14.43 *** Ku band’s effective absorption bandwidth of 4.25 GHz was achieved at an absorber thickness of only 1.3 *** BCM-C/polydimethylsiloxane coating had excellent corrosion resistance in the simulated marine environment(3.5wt%NaCl solution).The|Z|0.01Hz value of BCM-C remained at 106Ω·cm^(2)after 12 soaking *** successful preparation of the BaFe_(12)O_(19)composite en-capsulated with carbon nanoclusters provides new insights into the preparation of multifunctional absorbent materials and the fabrication of absorbent devices applied in humid marine environments in the future.

关键词： electromagnetic wave absorption anticorrosion barium ferrite cerium and manganese doping carbon nanoclusters

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From blocker to booster:Harnessing garnet surface chemistry for advanced solid-state electrolytes

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Nano Research 2025年第1期18卷 323-331页

作者： Jun Cheng Xuan Zhou Hongqiang Zhang Zhen Zeng Yuanyuan Li Yulong Zhu Yingsheng Liao Lijie Ci Deping Li State Key Laboratory of Precision Welding and Joining of Materials and Structures School of Materials Science and EngineeringHarbin Institute of Technology(Shenzhen)Shenzhen 518055China

Garnet electrolytes with high ionic conductivity and electrochemical stability are widely used as fillers to fabricate composite solid electrolytes(CPEs)within polymer ***,the performance of CPEs is significantly influenced by the surface characteristics of the garnet ***,the impact of garnet surface characteristics on CPEs was systematically investigated and a conversion from a typically unstable and Lewis basic surface to a more stable Lewis acidic surface was realized,which is shown to be more conductive to the improved performance of *** simultaneously removing the Li_(2)CO_(3)layer and applying a Li-Al-O coating,the influence of surface characteristics on CPEs was *** Lewis acid Li-Al-O surface coating not only promotes lithium salt dissociation,improving the ionic conductivity and ionic transfer number,but also prevents the reformation of the passive Lewis basic Li_(2)CO_(3)*** to garnet with a Lewis basic Li_(2)CO_(3)surface,the garnet modified with a Lewis acid Li-Al-O coating enhances CPEs,which exhibit an improved critical current density of 1.0 mA·cm^(-2)and highly stable lithium symmetric cell cycling for 400 h at 0.2 mA·cm^(-2).This research highlights the importance of surface chemistry in the design of high-performance solid-state batteries and presents a strategic modification approach for garnetbased CPEs.

关键词： garnet electrolyte composite solid electrolyte surface chemistry all-solid-state batteries

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Multi-scale dispersion strengthening for high-temperature titanium alloys:Strength preservation and softening mechanisms

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材料科学技术（英文版） 2025年第3期206卷 1-14页

作者： Xin Chen Lujun Huang Shuo Ma Fengbo Sun Shuai Wang Lin Geng School of Materials Science and Engineering Harbin Institute of TechnologyHarbin 150001China State Key Laboratory of Advanced Welding and Joining Harbin Institute of TechnologyHarbin 150001China School of Materials Science and Engineering Harbin Institute of TechnologyHarbin 150001China

The long-lasting expectation"the hotter the engine,the better"calls for the development of high-temperature metallic *** the high specific strengths of titanium alloys are compelling for such applications,their deleterious softening beyond 600 ℃ imposes serious *** has been known for decades regarding the phase metallurgy for precipitation strengthening design in titanium al-loys,however,the other facile strength promotion mechanism,dispersion strengthening,remains compar-atively less-explored and *** present research concerns the multi-scale dispersion strength-ening in titanium alloys,with mechanistic emphases on the critical plasticity micro-events that affect strength *** to the simultaneous introduction of intragranular dispersoids and intergran-ular reinforcers,the current titanium alloys present superior engineering tensile strength of 519 MPa at 700 ℃.Throughout the examined 25-800 ℃ temperature range,noticeable softening induced by the ther-mal activation occurs above 600 ℃,accompanied by evident strength *** temperature-dependence transition of dominated softening mechanisms from dynamic recovery to dynamic recrystallization has been clarified by theoretical ***,the strengthening effect of multi-scale architec-tures is underpinned as the enhanced dislocation strengthening owing to the introduction of thermally-stable heterointerfaces,which could generically guide the design of similar heat-resistant titanium alloys.

关键词： Titanium-based alloys Multi-scale architectures Mechanical properties Temperature dependence Dislocation strengthening

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Investigation of decay mechanisms and associated aspects of exotic nobelium isotopes using the Skyrme energy density formalism

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Chinese Physics C 2025年第3期49卷 132-142页

作者： Shubhpreet Kaur Raj Kumar Manoj K.Sharma Department of Physics and Materials Science Thapar Institute of Engineering and TechnologyPatiala 147004India

The search for heavy elements has yielded many surprises and enhanced our knowledge of nuclear synthesis and associated dynamical *** new elements and their associated isotopes have been synthesized,information concerning elements with Z≥102,remains ***,concerning the transfermium elements,the nuclear shell structure is key to ensuring nuclear ***,the shell effects have key implications on such *** experimental and theoretical investigations have been conducted to examine the reactions induced by heavy ions and the subsequent decay mechanisms in the superheavy mass *** addition,the region of transfermium elements is of great interest because of the neutron/proton shell ***,our objective is to analyze the decay mechanisms of nuclides having Z=102 nuclei,i.e.,^(248)No*and^(250)No*.An extensive study was conducted using the dynamical cluster-decay model(DCM)based on Quantum Mechanical Fragmentation Theory(QMFT).The focus was to investigate compound nucleus(CN)and non-compound nucleus(nCN)mechanisms,including fusion-fission(ff),quasi-fission(QF),and fast fission(FF).The specific isotopes of interest are^(248)No*and^(250)No*,with attention given to the role of the center-of-mass energy(E_(c.m))and angular momentum(l).The nuclear interaction potential was derived using the Skyrme energy density formalism(SEDF)with the GSkI force *** capture cross-sections were calculated using the-summed Wong *** determination of the probability of compound nucleus formation(PCN)involved a function that is dependent upon the center-of-mass *** lifetimes of the ff and QF channels were also ***,CN and nCN decay mechanisms for two isotopes of Z=102 nobelium were analyzed over the range of center-of-mass values(E_(c.m))considering the quadrupole deformationβ_(2)and optimum orientations(θ_(opt))of the decaying *** fragmentation potential,preformation probability,neck length parameter,and

关键词： super heavy nuclei Z=102 cross-sections lifetimes

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Layered g-C3N4/MoS2 Nanocomposites as Anode materials for Lithium Ion Storage

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ACS Applied Nano materials 2025年第19期8卷 9937-9948页

作者： Zhao, Lianyu Wang, Yishan Wen, Guangwu Zhang, Xueqian Huang, Xiaoxiao School of Materials Science and Engineering Shandong University of Technology Zibo255000 China School of Materials Science and Engineering Harbin Institute of Technology Harbin150001 China

Molybdenum disulfide (MoS2) emerges as a promising candidate for energy storage applications owing to its outstanding physical and electrochemical characteristics. However, at elevated current densities, the active sites within MoS2 tend to aggregate, which diminishes their functionality. This aggregation reduces the capacity for Li+ intercalation and contributes to suboptimal rate performance. Herein, MoS2 with extended layer spacing is constructed using an interstitial carbon strategy and is effectively complexed with nitrogen-rich carbon (g-C3N4). By alternately stacking MoS2 and g-C3N4 to form a nanoscale layered heterostructure, the interface area between the active material and the buffer layer is greatly increased. This configuration effectively reduces the loss of active material caused by MoS2 crushing and improves its low intrinsic conductivity. In addition, the prepared g-C3N4/MoS2 composites have abundant N-active sites and mesoporous structures, which greatly improve the lithium storage performance. Electrochemical tests reveal that the g-C3N4/MoS2 electrode achieves a specific capacity of 1616 mAh g-1 after 300 cycles at 0.1 A g-1, and 1350 mAh g-1 after 1000 cycles at 0.5 A g-1. The electrode demonstrates remarkable cycling stability and exceptional rate performance. The enhanced electrochemical performance is attributed to the rational design of the nanoscale heterostructure. These results surpass those of most MoS2-based anode materials reported in the literature. © 2025 American Chemical Society.

关键词： Nanocomposites

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Developing a novel Mg2Zn3Li1Gd alloy sheet with high room-temperature formability by introducing an elliptical texture distribution

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Journal of Magnesium and Alloys 2025年第2期13卷 877-893页

作者： Guangjie Xue Junjie He Yang Chen Zijian Zhang Kun Yang Yilun Zhou Huijun Hao Weiqi Wang Yong Mao Qinghang Wang Materials Genome Institute School of Materials and EnergyYunnan UniversityKunming 650504China School of Materials Science and Engineering Harbin Institute of TechnologyHarbin 150001HeilongjiangChina School of Mechanical Engineering Yangzhou UniversityYangzhou 225127China

In recent years,modification of texture distribution has been considered a valid approach to improve the room-temperature(RT)formability of magnesium(Mg)*** this study,a novel Mgsingle bond2Znsingle bond3Lisingle bond1Gd alloy sheet with weak elliptical-texture was fabricated by cold rolling and subsequent annealing,and it showed an excellent Erichsen(IE)value near 7.1 *** quasi-in-situ electron backscatter diffraction(EBSD)and transmission electron microscopy(TEM)analysis indicate that considerable basal and pyramidal dislocations can be activated in the cold rolling *** annealing,these dislocations can induce nucleation and then cause preferential misorientation relationships around〈uvt0〉concerning the nuclei and parent grains,which can facilitate the formation of elliptical ***,the particle-stimulated nucleation(PSN)mechanism and the co-segregation of Zn and Gd at grain boundaries(GB)further weak texture ***,the mechanical properties of the Mgsingle bond2Znsingle bond3Lisingle bond1Gd alloy sheet are significantly improved.

关键词： Mg-2Zn-3Li-1Gd Alloying Formability Plastic deformation

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Constructing Ti_(3)C_(2)T_(x)-MXene-based gradient woodpile structure by direct ink writing 3D printing for efficient microwave absorption

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International Journal of Minerals,Metallurgy and materials 2025年第3期32卷 657-667页

作者： Changtian Zhu Pei Liu Jin Chen Zixuan Ding Guohui Tang Qingqing Gao Yinxu Ni Kai Xu Zhilei Hao Gaojie Xu Fenghua Liu School of Materials Science and Chemical Engineering Ningbo UniversityNingbo 315211China Ningbo Institute of Materials Technology&Engineering Chinese Academy of SciencesNingbo 315201China

As a novel 2D material,Ti_(3)C_(2)T_(x)-MXene has become a major area of interest in the field of microwave absorption(MA).However,the MA effect of common Ti_(3)C_(2)T_(x)-MXene is not prominent and often requires complex processes or combinations of other ma-terials to achieve enhanced *** this context,a kind of gradient woodpile structure using common Ti_(3)C_(2)T_(x)-MXene as MA ma-terial was designed and manufactured through direct ink writing(DIW)3D *** minimum reflection loss(RL_(min))of the Ti_(3)C_(2)T_(x)-MXene-based gradient woodpile structures with a thickness of less than 3 mm can reach-70 dB,showing considerable improve-ment compared with that of a completely filled *** addition,the effective absorption bandwidth(EAB)reaches 7.73 *** study demonstrates that a Ti_(3)C_(2)T_(x)-MXene material with excellent MA performance and tunable frequency band can be successfully fab-ricated with a macroscopic structural design and through DIW 3D printing without complex material hybridization and modification,of-fering broad application prospects by reducing electromagnetic wave radiation and interference.

关键词： Ti_(3)C_(2)T_(x)-MXene electromagnetic wave absorption macro-design impedance matching 3D printing ink

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Heterostructure Fe7S8/Mn(OH)2 of incomplete sulfurization induces Mn atoms with high density of states for enhancing oxygen evolution reaction and supercapacitor electrochemical performance

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Journal of Colloid and Interface science 2025年第PartA期677卷 974-982页

作者： Meng, Dexing Hong, Lumin Fang, Zhaojun Jiang, Qianqian Huang, Huabo Wu, Xiaodong Tang, Jianguo Institute of Hybrid Materials National Center of International Research for Hybrid Materials Technology National Base of International Science & Technology Cooperation College of Materials Science and Engineering Qingdao University Qingdao206000 China College of Materials Science and Engineering Nanjing Tech University Nanjing210009 China Hubei Key Laboratory of Plasma Chemistry and Advanced Materials School of Materials Science and Engineering Wuhan Institute of Technology Wuhan430205 China

Heterostructures and the introduction of heterogeneous elements have been regarded as effective strategies to promote electrochemical performance. Herein, sulfur species are introduced by a simple hydrothermal vulcanization method, which constructs the open heterostructure Fe7S8/Mn(OH)2 as a bifunctional material. The open cordyceps-like morphology can make the material contact more sufficiently with the electrolyte, exposing a large number of reaction sites. Furthermore, the introduction of the heterogeneous element S successfully constructs a heterogeneous interface, the interface-modulated composite material consists of Mn atoms contributing the main density of states (DOS) near the Fermi energy level from the density functional theory (DFT) calculations, which optimizes the adsorption energy of oxygen-containing intermediates during the oxygen evolution reaction (OER) process and reduces the reaction energy barrier, being conducive to the improvement of the material's electrochemical properties. As predicted, the Fe7S8/Mn(OH)2 material exhibits remarkable electrochemical properties, such as an overpotential of 202 mV at 10 mA cm−2 for the oxygen evolution reaction and even a specific capacitance of 2198 F g−1 at 1 A g−1. This work provides new insights into the role of introducing sulfur species and controlling the structure of the material, and exemplifies novel design ideas for developing bifunctional materials for energy storage and conversion. © 2024 Elsevier Inc.

关键词： Supercapacitor

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A Practical Zinc Metal Anode Coating Strategy Utilizing Bulk h-BN and Improved Hydrogen Redox Kinetics

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Energy & Environmental materials 2025年第2期8卷 63-71页

作者： Dong Il Kim Hee Bin Jeong Jungmoon Lim Hyeong Seop Jeong Min Kyeong Kim Sangyeon Pak Sanghyo Lee Geon-Hyoung An Sang-Soo Chee Jin Pyo Hong Seung Nam Cha John Hong Department of Physics Research Institute for Natural Science Hanyang University School of Materials Science and Engineering Kookmin University Department of Physics Sungkyunkwan University (SKKU) School of Electronic and Electrical Engineering Hongik University Materials Science and Engineering Kumoh National Institute of Technology Department of Energy Engineering Gyeongsang National University Nano Convergence Materials Center Korea Institute of Ceramic Engineering and Technology (KICET) Division of Nano-Scale Semiconductor Engineering Hanyang University

Achieving high-performance aqueous zinc-ion batteries requires addressing the challenges associated with the stability of zinc metal anodes,particularly the formation of inhomogeneous zinc dendrites during cycling and unstable surface *** study introduces a practical method for scattering untreated bulk hexagonal boron nitride（h-BN） particles onto the zinc anode *** cycling,stabilized zinc fills the interstices of scattered h-BN,resulting in a more favorable（002） ***,zinc dendrite formation is effectively suppressed,leading to improved electrochemical *** zinc with scattered h-BN in a symmetric cell configuration maintains stability 10 times longer than the bare zinc symmetric cell,lasting 500 ***,in a full cell configuration with α-MnO2cathode,increased H+ion activity can effectively alter the major redox kinetics of cycling due to the presence of scattered h-BN on the zinc *** shift in H+ion activity lowers the overall redox potential,resulting in a discharge capacity retention of 96.1% for 300 cycles at a charge/discharge rate of 0.5 *** study highlights the crucial role of surface modification,and the innovative use of bulk h-BN provides a practical and effective solution for improving the performance and stability.

关键词： aqueous zinc ion batteries H+ ion insertion hexagonal boron nitride scattering Zn metal anode

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