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Simultaneously Enhanced Strength-Ductility Synergy and Hydrogen Embrittlement Resistance of a Laser Powder Bed Fusion Ti-6al-4v Alloy Via Reversible Transformation

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SSRN 2024年

作者： Li, Yu Ma, Huanqi Li, Wei Xu, Chun School of Material Science and Engineering Shanghai Institute of Technology No. 100 Haiquan Road Fengxian District Shanghai China Institute of Advanced Steels and Materials School of Materials Science and Engineering Shanghai Jiao Tong University Shanghai200240 China Shanghai Key Laboratory of Material Laser Processing and Modification China

This study adopts a strategy of reversible transformation to enhance the strength-ductility synergy and hydrogen embrittlement (HE) resistance of a laser powder bed fusion (LPBF) Ti-6A-4V alloy through annealing treatment. The as-printed (AP) samples have high tensile strength but limited ductility and strong HE sensitivity. Annealing at 550℃ increases the tensile elongation (TEL), but δ-hydrides nucleation at high-angle grain boundaries leads to significant elongation loss after hydrogen charging. However, the reverse transformation occurs when annealed at 750℃, and the newly-formed sandwich α'/β/α' strongly inhibits hydrides formation and alleviates stress concentration, thus contributing to a higher TEL and larger HE resistance. © 2024, The Authors. All rights reserved.

关键词： Aluminum alloys

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Structure and enhanced dielectric temperature stability of BaTiO3- based ceramics by Ca ion B site-doping

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Journal of Materiomics 2021年第2期7卷 295-301页

作者： Xuewen Jiang Hua Hao Yang Yang Enhao Zhou Shujun Zhang Ping Wei Minghe Cao Zhonghua Yao Hanxing Liu Foshan Xianhu Laboratory of the Advanced Energy Science and Technology Guangdong Laboratory Xianhu Hydrogen ValleyFoshan528200China State Key Laboratory of Advanced Technology for Materials Synthesis and Processing School of Materials Science and EngineeringWuhan University of TechnologyWuhan430070China State Key Laboratory of Advanced Technology for Materials Synthesis and Processing International School of Material Science and EngineeringWuhan University of TechnologyWuhan430070China Institute for Superconducting and Electronic Materials Australian Institute of Innovative MaterialsUniversity of WollongongWollongongNSW2500Australia Nanostructure Research Centre Wuhan University of TechnologyWuhan430070China

Capacitor is an important part of many electronic devices,so the temperature stability as one key parameter of capacitor needs to be improved constantly for meeting the requirements of various application ***,combined with the X-ray diffraction(XRD),selected area electron diffraction(SAED)and Vienna Ab-initio Simulation Package(VASP)calculation,it was confirmed that Ca ion can substitute the Ti site in the BaTi1-xCaxO3-x[BTC100](0≤x≤0.05)ceramics synthesized by solid-phase method which greatly improved the low-temperature stability of dielectric ***,introducing Bi3þand Zn^(2+) into BTC4 to form(1-y)BaTi0.6Ca0.04O2.96-yBi(Zn_(0.5)Ti_(0.5))O_(3)[(1-y)BTC4-yBZT](0.1≤y≤0.2)ceramics can further improve the dielectric-temperature stability by means of diffused phase transition and core-shell *** importantly,the 0.85BTC4-0.15BZT ceramics with a pseudocubic perovskite structure possessed a temperature coefficient of capacitance at 25℃(TCC25℃)being less than±15%over a wide temperature range of 55℃-200℃and a temperate dielectric constant(ε=1060)and low dielectric loss(tanδ=1.5%),which measure up to the higher standard in the current capacitor industry such as X9R requirements.

关键词： BaTiO3 Ca substituted X9R capacitors Dielectric properties

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Correction to: Durable Fe3O4/PPy Particle Flow Spun Textile for Electromagnetic Interference Shielding and Joule Heating (advanced Fiber materials, (2025), 7, 2, (513-527), 10.1007/s42765-024-00498-2)

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advanced Fiber materials 2025年 1-1页

作者： Liu, Jiaxin Qi, Shuo Wang, Hongshan Fu, Chiyu Xu, Weilin Su, Bin Tang, Wenyang Xia, Zhigang State Key Laboratory of New Textile Materials and Advanced Processing Technologies School of Textile Science and Engineering Industry Research and Development Center of Functional Materials and Textile New Technology Textile Industry Key Laboratory of Yarn and Its Functionalization Wuhan Textile University Hubei Wuhan430200 China State Key Laboratory of Material Processing and Die and Mould Technology School of Materials Science and Engineering Huazhong University of Science and Technology Hubei Wuhan430074 China National Local Joint Engineering Laboratory of Resin-Based Structure and Functional Material Technology Hubei Xiaogan432100 China

In this article the first affiliation details for Jiaxin Liu were incorrectly given as 'State Key laboratory of New Textile materials and advanced processing Technologies, School of Textile Science and engineering, Wuhan Textile University, Wuhan, 430200, Hubei, People’s Republic of China' but should have been 'State Key laboratory of New Textile materials and advanced processing Technologies, School of Textile Science and engineering, Industry Research and Development Center of Functional materials and Textile New Technology, Textile Industry Key laboratory of Yarn and Its Functionalization, Wuhan Textile University, Wuhan, 430200, Hubei, People’s Republic of China'. The original article has been corrected. © Donghua University, Shanghai, China 2025.

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Effect of stress loading direction on microstructure evolution and age-hardening behavior of a stress-aged Mg-7Sn alloy

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Journal of Alloys and Compounds 2025年 1032卷

作者： Jiang, Jing Ran, Jishang Tong, Lin Bi, Guangli Li, Yuandong Chen, Tijun State Key Laboratory of Advanced Processing and Recycling of Nonferrous Metals Lanzhou University of Technology Lanzhou730050 China School of Material Science and Engineering Lanzhou University of Technology Lanzhou730050 China AVIC Shaanxi Hongyuan Aviation Forging Company Ltd. Xianyang713801 China

The effect of stress loading direction on microstructure evolution and age-hardening behavior of a stress-aged Mg-7Sn alloy with a compressed stress of 40 MPa at 160 °C was investigated in this paper. The compressive stress perpendicular to the c-axis effectively facilitated the formation of a high volume fraction of twins and Mg2Sn phases, thereby promoting a c-axis//ED texture. In contrast, the stress parallel to the c-axis resulted in the formation of small amounts of twins and Mg2Sn phases, which further reinforced the basal plane texture. The stress aging with compressive stress applied perpendicular to the c-axis significantly increased the peak hardness of the alloy and reduced the time reached the peak hardness, compared to compressive stress applied parallel to the c-axis. The compressive testing results indicated that the stress peak-aged alloy perpendicular to the c-axis exhibited excellent mechanical properties, whose compressive yield strength, ultimate compressive strength and compressive elongation were 191.3 MPa, 449.9 MPa and 12.6 %, respectively. The high compressive strengths of the peak-aged alloy at a compressive stress perpendicular to the c-axis was mainly attributed to the grain refinement and precipitation strengthening of Mg2Sn phase. © 2025 Elsevier B.V.

关键词： Microhardness

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The microstructural evolution and wear properties of Ni60/high-aluminum bronze composite coatings with directional structure

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Rare Metals 2021年第4期40卷 952-960页

作者： Xiao-Tian Yang Xiu-Qian Li Qiang-Bin Yang Jun-Ling Duan Xiao-Yue Fu Heng-Li Wei Wen-Sheng Li College of Materials Science and Engineering State Key Laboratory of Advanced Processing and Recycling of Nonferrous MetalsLanzhou University of TechnologyLanzhou 730050China Wenzhou Engineering Institute of Pump&Valve Lanzhou University of TechnologyWenzhou 325105China Chongqing Key Laboratory of Environmental Materials&Remediation Technologies College of Chemistry&Environmental EngineeringChongqing University of Arts and SciencesChongqing 402160China Department of Material and Chemical Engineering College of Technology and EngineeringLanzhou University of TechnologyLanzhou 730050China

The directional structure of Ni60/high-aluminum bronze composite coating was formed using induction remelting and forced *** microstructural evolution and the characteristics of interface growth were *** results showed that the remelted coating formed metallurgical bonding with the *** micros tructures changed from plane crystal to dendrite,cellular dendrite,fine cellular dendrite,and then to dendrite again with the increase in the cooling *** crystal grew along the heat flow direction and had(111) and(200)preferred orientations when the cooling rate was 1.886 ml-min^(-1).mm^(-2).The plane crystal,dendrite and cellular dendrite were mainly composed of compounds and solid solutions with Ni,Fe and Cu,and they were surrounded by strengthening phases composed of Cr,C and *** grain boundary of directional structure coatings showed the characteristic of regular eutectic growth,but grain boundary of remelted coating presented characteristic of divorced eutectic *** wear resistance of directional structure coatings is better than that of remelted coating.

关键词： Aluminum bronze composite coating Induction remelting Directional structure Grain boundaries Preferred orientation

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Geochemistry and Microstructure of Construction materials from the Eastern Districts of N’Djamena Chad with a View to Their Stabilization in the Building and Pottery

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materials Sciences and Applications 2024年第10期15卷 431-449页

作者： Warabi Bebbata Frédéric Pagore Djoda Madjihingam Ndjolba Bertin Pagna Kagonbé Raïdandi Danwé Department of Civil Engineering National Advanced School of Engineering University of Maroua Maroua Cameroon Department of Civil Engineering and Architecture Faculty of Engineering Sciences University of Francophony (UNF) NDjamena Chad Laboratory of Mechanic and Material Processing (L2MP) Higher Teachers Training for Technical College University of Douala Douala Cameroun National Advanced School of Public Works NDjamena Chad Local Materials Authority Promotion (MIPROMALO) Yaound Cameroon

The early collapse of habitats in the spontaneous neighborhoods of the South-East of N’Djamena city pushed us to carry out investigations on the soil characteristics of the Ambatta 1 (Z1), Ambatta 2 (Z2), and Siguété (Z3) neighborhoods in this city. XRF (X-Ray Fluorescence), XRD (X-Ray Diffraction), FTIR (Fourier Transform InfraRed), SEM (Scanning Electron Microscopy), and ATG/DTA (Thermogravimetry Analysis/Differential Thermal Analysis) were conducted for microstructural and thermal identification. The geochemistry of the three soils studied revealed the presence of SiO2 (49.03% - 73.80%), Al2O3 (08.35% - 17.34%), and Fe2O3 (03.79% - 10.90%) as major elements. The alkalines and alkaline earth elements include potassium K2O (02.57% - 03.07%), magnesium MgO (0.47% - 01.21%), titanium TiO2 (0.81% - 01.41%), sodium Na2O (01.01% - 01.13%) and calcium CaO (01.28% - 03.28%). The fire loss of 09.90% on average remains low. XRD revealed the presence of quartz (~64.28%), feldspar (~07.14%), which are non-clay minerals, and clay minerals like kaolinite (~14.85%), illite (~07.14%) and some traces of smectite and amphibite on all three sites. These oxides were confirmed by FTIR analysis through peaks illustrating the vibrational movements specific to these oxides. SEM shows particles in the increasingly shaped, rounded, shiny sand grains. This is the presence of quartz. These quartz micro textures of abrasive surfaces and topography with conchoidal fractures predict promising mechanical results. Smectite appears in wavy clusters, kaolinite in the form of shiny crystals, and illite materializes by the irregularity of the crystalline shape. These constituents are represented by the presence of their oxides specified by geochemistry. Thermally, the three samples overall retain more than 94% of their constituent on average for a temperature range reaching 950˚C, which predestines them for specific applications. Thus, this study aims to stabilize constructions using local materials

关键词： N’Djamena East Soils Physicochemical Microstructural and Thermal Characterization

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Correction: Ultrathin high-performance electromagnetic wave absorbers with facilely fabricated hierarchical porous Co/C crabapples (Journal of materials Chemistry C (2019) 7 (1659-1669) DOI: 10.1039/C8TC04984J)

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Journal of materials Chemistry C 2025年第23期13卷 12025-12026页

作者： Nannan Wu Chang Liu Dongmei Xu Jiurong Liu Wei Liu Hu Liu Jiaoxia Zhang Wei Xie Zhanhu Guo Key Laboratory for Liquid–Solid Structural Evolution and Processing of Materials Ministry of Education and School of Materials Science and Engineering Shandong University Jinan Shandong 250061 China Integrated Composites Laboratory (ICL) Department of Chemical & Biomolecular Engineering University of Tennessee Knoxville TN 37996 USA State Key Laboratory of Crystal Materials Shandong University Shandong 250100 China Key Laboratory of Materials Processing and Mold (Zhengzhou University) Ministry of Education National Engineering Research Center for Advanced Polymer Processing Technology Zhengzhou University Zhengzhou China School of Material Science and Engineering Jiangsu University of Science and Technology Zhenjiang Jiangsu China Key Laboratory of Lightweight and Reliability Technology for Engineering Vehicle Education Department Changsha University of Science & Technology Changsha Hunan China

The authors regret the following errors in the published article: In the originally published supplementary information document, Fig. S1a, S5c and S6d were images of the same sample obtained at optimal conditions. In order to avoid misleading readers, the original Fig. S5c and S6d have been replaced by new images captured at different places of the same sample. In addition, an error was found in the Fig. S6 caption: the PVP amount for both Fig. S6a and b should be 0 g. The corrected versions of Fig. S5 and S6 are shown below. In the "Results and discussion" section of the published article, on page 1662 of the pdf, the related description of Fig. S6 should be corrected as follows: "Numerous scattered flakes and only a few a-Co(OH)2 crabapples were obtained without the addition of PVP (Fig. S6a and b, ESI)." The supplementary information document has been updated with these changes. (Figure presented) In Fig. 2 in the published article, an error occurred when assembling the images: Fig. 2b and e were inadvertently swapped. The accompanying calculations and the following descriptions used the correct data and thus are not affected. The corrected Fig. 2 is shown in this notice. Related to this, on page 1664 of the pdf, the related text remains almost constant with some fluctuations..." should be replaced with remains almost constant despite fluctuations from 13.6-14.4 GHz...". In addition, "For sample M30, a sharp decrease of in the frequency range of 12-18 GHz occurs while the corresponding shows a resonance peak,. . ." should be replaced with "For sample M30, a decrease of occurs while the shows a resonance peak in the frequency range of 12-18 GHz,. . .". In addition, on page 1665 of the pdf, the sentence "The SBET for hierarchical porous Co/C crabapples is 68.4 m2 g-1" should be corrected to "The SBET for hierarchical porous Co/C crabapples is 64.4 m2 g-1" after rechecking the raw data. It should be noted that the conclusions of the work are not affected by these c

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Strongly Enhancing the Energy Storage Properties and Stability of Amorphous BaTiO3 Thin Films via Ions Doping

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SSRN 2024年

作者： Chang, Ruiling Yao, Zhonghua Xing, Yutong Wang, Jun Hao, Hua Cao, Minghe Liu, Hanxing State Key Laboratory of Advanced Technology for Materials Synthesis and Processing School of Material Science and Engineering Wuhan University of Technology Wuhan430070 China International School of Material Science and Engineering Wuhan University of Technology Wuhan430070 China Sanya Science and Education Innovation Park of Wuhan University of Technology Sanya572000 China

Amorphous thin films with high power density and breakdown strength satisfy the needs of advanced power electronic systems. Nonetheless, improving the energy storage density of amorphous films is critical for addressing the growing demand for electricity. We apply high spontaneous polarization BaTiO3 as the main component to make (1-x)Ba(Ti0.99Mn0.02)O3-xBiFeO3((1-x)BTM-xBF) thin films. Doping BiFeO3 (BF) synergistically boosts polarization. The introduction of amorphous phases and Mn ions enhances the breakdown strength. The results demonstrate that, at x=0.10, the film can achieve both a high efficiency of 80.3% and an excellent energy storage density of 111.3 J cm-3. Moreover, the film has a strong thermal stability within a broad range of 20°C ~ 160°C, as well as the cycling reliability is as high as 105 times. The present study offers a practical approach to develop film capacitors with outstanding energy storage capabilities. © 2024, The Authors. All rights reserved.

关键词： Amorphous films

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Large-scale manufacturing sulfide superionic conductor for advancing all-solid-state batteries

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Matter 2025年

作者： Wang, Shuo Lou, Chenjie Wu, Xinbin Lin, Jing Gautam, Ajay Li, Shenghao Huang, Jielei Cheng, Zhu Zhang, Shengnan Zhang, Xin Strauss, Florian Brezesinski, Torsten Luo, Guoqiang Tang, Mingxue Shen, Yang Lin, Yuanhua Nan, Ce-Wen Center of Smart Materials and Devices State Key Laboratory of Advanced Technology for Materials Synthesis and Processing School of Material Science and Engineering Wuhan University of Technology Wuhan430070 China Center for High Pressure Science and Technology Advanced Research Beijing100094 China State Key Laboratory of New Ceramics and Fine Processing School of Materials Science and Engineering Tsinghua University Beijing100084 China Kaiserstr. 12 Karlsruhe76131 Germany Department of Radiation Science and Technology Delft University of Technology JB Delft2629 Netherlands

Lithium argyrodites with high ionic conductivities are favorable solid electrolytes (SEs) for all-solid-state batteries (ASSBs). However, their low preparation efficiency and poor cycling performance hinder their large-scale applications. In this work, we demonstrate successful large-scale production (over 1 kg per batch for the first time) of Li5.5PS4.5Cl0.75Br0.75 (LPSCB) by fast dry mixing followed by annealing, which presents high room temperature ionic conductivities of 13 mS cm−1 for cold-pressed and 25 mS cm−1 for sintered pellets. Combining neutron powder diffraction and 6Li → 7Li tracer-exchange nuclear magnetic resonance (NMR) spectroscopy measurements, we show that intercage jumps frequently occur through the 48h-16e-48h pathway in LPSCB, promoting the overall lithium conduction. The assembled ASSBs using LPSCB and a LiNi0.83Co0.11Mn0.06O2 electrode can be cycled for over 2,500 cycles at a 0.5 C rate and 1,800 cycles at a 2 C rate without any capacity degradation. Our results will accelerate the commercialization of sulfide SE for ASSBs. © 2025 Elsevier Inc.

关键词： Neutron powder diffraction

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Simultaneous optimization of lattice and spin configurations in atomic scale simulation of magnetic materials

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Physical Review B 2025年第13期111卷 134412-134412页

作者： Zhengtao Huang Teng Yang Hanxing Liu Ben Xu State Key Laboratory of Advanced Technology for Materials Synthesis and Processing Center for Smart Materials and Device Integration School of Material Science and Engineering Wuhan University of Technology Wuhan 430070 People's Republic of China Graduate School of China Academy of Engineering Physics Beijing 100088 People's Republic of China School of Materials Science and Engineering Tsinghua University Beijing 100084 People's Republic of China

Large scale atomistic simulations involving spin-lattice coupling are at the forefront of research in condensed matter physics and materials science. A key challenge lies in determining the ground state configurations of spins and lattices given this strong coupling, complicated by their evolution adherence to distinct governing equations. Unlike first-principles calculations, where the magnetic configuration is naturally determined by minimizing the electronic energy, no existing algorithm can simultaneously optimize both lattice and spin degrees of freedom at the atomic scale. This paper introduces a synergistic optimization framework for lattice and spin optimization in magnetic materials, overcoming the conventional separation approach. Employing a “pseudoatomic” method, the simultaneous optimization of atomic and spin configurations enhances accuracy and speed, enabling both atomic scale precision and large scale calculations. Applied to face-centered-cubic iron and BiFeO3, this approach demonstrates effective convergence, offering a robust tool for complex spin-lattice coupling problems, which paves a path for addressing high-dimensional optimization problems.

关键词： Atoms

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