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engineering Application Modeling Based on Mechanism Law for Hard Rock Disc Cutter Wear Evolution

Rock Mechanics and Rock engineering 2025年 1-17页

作者： Wang, Lihui Kang, Yilan Zhang, Qian Li, Haipeng Delivery Equipment Support Department Army Military Transportation Academy Tianjin300161 China Key Laboratory of Modern Engineering Mechanics School of Mechanical Engineering Tianjin University Tianjin300072 China School of Materials Science and Engineering Hebei University of Technology Tianjin300130 China

Disc cutter wear and replacement significantly affect the construction efficiency and safety of hard rock tunnels. Disc cutter wear prediction has become a critical engineering problem. Based on the mechanical analysis, combined with experimental results, referring to numerical simulation analysis, this study developed a new method for predicting the wear evolution process of hard rock disc cutter. In this study, a theoretical equation of the disc cutter wear evolution is presented through the analysis on wear failure mechanism. The laws in the influence of rock joint direction angle and joint spacing on the tunnelling penetration rate are revealed based on the statistical analysis of field data and simulation data. And a new equation is proposed for calculating the contact stress. In addition, the internal relations among the disc cutter motion state, disc cutter load, rock friction performance are analyzed to propose a new equation for calculating relative slip distance. Thus, a new model was established to predict the disc cutter wear evolution, and the model was preliminarily validated using specific projects data collected from Yinsong Tunnel and Yintao Project #9 Tunnel. Owing to the comprehensive consideration of the effects of joint orientation and spacing in the hard rock mass, rock mechanics and performance characteristics, tunnelling parameters of the tunnel boring machine, cutter geometric properties, and cutter spacing on cutter wear evolution, this new model achieves real-time prediction, ensuring universality and accuracy. In further study, the laws in the influence of abnormal wear of disc cutters on TBM tunnelling loads will be analyzed to expand the prediction scope. © The Author(s), under exclusive licence to Springer-Verlag GmbH Austria, part of Springer Nature 2025.

关键词： Rock mechanics

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Biobased Poly(ester amide)s as Sustainable Coating materials for Vegan Leather with Improved Haptic Sensation

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ACS Sustainable Chemistry and engineering 2025年第20期13卷 7585-7597页

作者： Ryu, Jieun Hao, Lam Tan Kim, Hyeri Lee, Somyong Jeon, Hyeonyeol Hwang, Dong Soo Park, Jeyoung Park, Cheol Hun Oh, Dongyeop X. Koo, Jun Mo Park, Sung Bae Ulsan44429 Korea Republic of Pohang37673 Korea Republic of Ulsan44429 Korea Republic of Pohang37673 Korea Republic of Daejeon34113 Korea Republic of Department of Chemical and Biomolecular Engineering Sogang University Seoul04107 Korea Republic of Department of Polymer Science and Engineering and Program in Environmental and Polymer Engineering Inha University Incheon22212 Korea Republic of Department of Organic Materials Engineering Chungnam National University Daejeon34134 Korea Republic of Department of Materials Science and Engineering Chungnam National University Daejeon34134 Korea Republic of

Increased consumer awareness of animal welfare and environmental sustainability has driven the development of vegan leather alternatives to natural leather. Fossil-derived leather substitutes offer superior strength and thermal stability but often lack biodegradability, carbon neutrality and aesthetics. Biorenewable alternatives are more eco-friendly but typically suffer from insufficient thermal and mechanical properties and poor moisture resistance. This study presents the synthesis of mechanically reinforced, thermally enhanced and biodegradable poly(ester amide)s (PEAs) incorporating hydrogen bonds as vegan leather coating materials. Synthesized from biobased 1,4-butanediol, adipic acid and nylon 46 via a two-step transesterification/polycondensation process, the resulting PEAs exhibit over eight times higher tensile strength, 3-fold greater toughness, and enhanced thermal stability compared to their constituting homopolymers, poly(butylene adipate) and nylon 46. All PEAs disintegrate within 18 weeks and achieve over 60% biodegradation rate relative to cellulose under composting conditions within one month. When applied to mushroom fabrics, the PEA coating provides haptic sensations (slipperiness and softness) comparable to commercially available leather. Life-cycle assessment indicates that PEA-coated leather imposes considerably lower environmental impacts than both bovine and polyurethane-based leather. This novel material holds promise as a sustainable, high-performance vegan leather substitute. © 2025 American Chemical Society.

关键词： Biodegradability

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Solidification modes and delta-ferrite of two types of 316L stainless steels:a combination of as-cast microstructure and HT-CLSM research

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Journal of Iron and Steel Research International 2025年第2期32卷 426-436页

作者： Yang Wang Chao Chen Xiao-yu Yang Zheng-rui Zhang Jian Wang Zhou Li Lei Chen Wang-zhong Mu College of Materials Science and Engineering Taiyuan University of TechnologyTaiyuan 030024ShanxiChina Department of Materials Science and Engineering KTH Royal Institute of TechnologyStockholm 10044Sweden College of Artificial Intelligence and Big Data for Medical Sciences Shandong First Medical University and Shandong Academy of Medical SciencesJinan 250117ShandongChina College of Mechanical Engineering Taiyuan University of TechnologyTaiyuan 030024ShanxiChina Key Laboratory of Electromagnetic Processing of Materials(Ministry of Education) Northeastern UniversityShenyang 110819LiaoningChina

In 316L austenitic stainless steel,the presence of ferrite phase severely affects the non-magnetic properties.316L austenitic stainless steel with low-alloy type(L-316L)and high-alloy type(H-316L)has been *** microstructure and solidification kinetics of the two as-cast grades were in situ observed by high temperature confocal laser scanning microscopy(HT-CLSM).There are significant differences in the as-cast microstructures of the two 316L stainless steel *** L-316L steel,ferrite morphology appears as the short rods with a ferrite content of 6.98%,forming a dual-phase microstructure consisting of austenite and ***,in H-316L steel,the ferrite appears as discontinuous network structures with a content of 4.41%,forming a microstructure composed of austenite and sigma(σ)*** alloying elements in H-316L steel exhibit a complex distribution,with Ni and Mo enriching at the austenite grain ***-CLSM experiments provide the real-time observation of the solidification processes of both 316L specimens and reveal distinct solidification modes:L-316L steel solidifies in an FA mode,whereas H-316L steel solidifies in an AF *** differences result in ferrite and austenite predominantly serving as the nucleation and growth phases,*** solidification mode observed by experiments is similar to the thermodynamic calculation *** L-316L steel solidified in the FA mode and showed minimal element segregation,which lead to a direct transformation of ferrite to austenite phase(δ→γ)during phase transformation after ***,the H-316L steel solidified in the AF mode and showed severe element segregation,which lead to Mo enrichment at grain boundaries and transformation of ferrite into sigma and austenite phases through the eutectoid reaction(δ→σ+γ).

关键词： 316L austenitic stainless steel As-cast microstructure High-temperature confocal laser scanning microscopy Solidification mode Ferrite Characterization

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Correction: materials laboratories of the future for alloys, amorphous, and composite materials (MRS Bulletin, (2025), 50, 2, (190-207), 10.1557/s43577-024-00846-y)

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MRS Bulletin 2025年 1-2页

作者： Banerjee, Sarbajit Meng, Y. Shirley Minor, Andrew M. Zhang, Minghao Zaluzec, Nestor J. Chan, Maria K.Y. Seidler, Gerald McComb, David W. Agar, Joshua Mukherjee, Partha P. Melot, Brent Chapman, Karena Guiton, Beth S. Klie, Robert F. McCue, Ian D. Voyles, Paul M. Robertson, Ian Li, Ling Chi, Miaofang Destino, Joel F. Devaraj, Arun Marquis, Emmanuelle A. Segre, Carlo U. Liu, Huinan H. Yang, Judith C. Momeni, Kasra Misra, Amit Abdolrahim, Niaz Medvedeva, Julia E. Cai, Wenjun Sehirlioglu, Alp Dizbay-Onat, Melike Mehta, Apurva Graham-Brady, Lori Maruyama, Benji Rajan, Krishna Warner, Jamie H. Taheri, Mitra L. Kalinin, Sergei V. Reeja-Jayan, B. Schwarz, Udo D. Simon, Sindee L. Brown, Craig M. Department of Chemistry and Department of Materials Science & Engineering Texas A & M University College Station United States Pritzker School of Molecular Engineering The University of Chicago Chicago United States Department of Materials Science & Engineering University of California Berkeley Berkeley United States National Center for Electron Microscopy Molecular Foundry Lawrence Berkeley National Laboratory Berkeley United States Center for Nanoscale Materials Argonne National Laboratory Lemont United States Department of Physics University of Washington Seattle United States Department of Materials Science & Engineering The Ohio State University Columbus United States Department of Mechanical Engineering and Mechanics Drexel University Philadelphia United States School of Mechanical Engineering Purdue University West Lafayette United States Department of Chemistry University of Southern California Los Angeles United States Department of Chemistry Stony Brook University The State University of New York Stony Brook United States Department of Chemistry University of Kentucky Lexington United States Department of Physics University of Illinois at Chicago Chicago United States Department of Materials Science & Engineering Northwestern University Evanston Bangladesh Department of Materials Science & Engineering University of Wisconsin–Madison Madison United States Department of Materials Science and Engineering University of Pennsylvania Philadelphia United States Department of Mechanical Engineering and Materials Science Duke University Durham United States Department of Chemistry Creighton University Omaha United States Physical and Computational Sciences Directorate Pacific Northwest National Laboratory Richland United States Department of Materials Science & Engineering University of Michigan–Ann Arbor Ann Arbor United States Department of Physics Illinois Institute of Technology Chicago United States Department of Bioengineering and the Mater

This article was updated to correct Minghao Zhang’s affiliation from "Pritzker School of Molecular engineering, The University of Chicago, Chicago, USA" to "Pritzker School of Molecular engineering, The University of Chicago, Chicago, USA;Argonne National Laboratory, Lemont, USA." Argonne National Laboratory was left off the original publication. © The Author(s) 2025.

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WE43 Surface Composite with Oxide Particles by Friction Stir Processing

WE43 Surface Composite with Oxide Particles by Friction Stir...

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Magnesium Technology Symposium, 2025, held as part of the TMS Annual Meeting and Exhibition, TMS 2025

作者： Ghauri, Hamza Faisal Shunmugasamy, Vasanth C. Mansoor, Bilal Department of Materials Science and Engineering Texas A&M University College StationTX77840 United States Mechanical Engineering Program Texas A&M University at Qatar Doha Qatar Department of Mechanical Engineering Texas A&M University College StationTX77840 United States

ISBN: (纸本)9783031810602

WE43WE43 has superior mechanical and corrosionCorrosion performance compared to other magnesium alloysMagnesium alloy but surface treatments, mechanical processes, and heat treatments to further enhance its properties continue to be explored. Here we present our preliminary findings about a WE43WE43surface compositeSurface composite with oxide particles produced using friction stir processingFriction stir processing. Significant grain refinement, precipitate redistribution, and increase in microhardness by 25% were achieved in processed regions compared to base material. CorrosionCorrosion testing in 0.9% NaCl solution revealed that the FSP-treated material exhibited a 196% lower Icorr and a more stable open circuit potential (OCP) than cast WE43WE43, suggesting superior corrosion resistanceCorrosion resistance. While the findings promise suitability of the processed alloy for a more intensive range of operating conditions than the cast alloy, further work to study the effect of the size, volume, and composition of the oxide reinforcements needs to be carried out. © The Minerals, Metals & materials Society 2025.

关键词： Grain refinement

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锡基硫化物电催化剂中强且均匀的Sn–S键促进CO2到甲酸盐的高效转化（英文）

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science China materials 2025年第5期68卷 1602-1610页

作者：侯国禹崔洪花李亿程刘亚杨振艺赵明罗中箴邹志刚张玉 School of Mechanical and Power Engineering East China University of Science and Technology Laboratory of Eco-materials Advanced Technology College of Materials Science and EngineeringFuzhou University Department of Materials Science and Engineering National University of Singapore Eco-materials and Renewable Energy Research Center College of Engineering and Applied SciencesNanjing University

电化学CO2还原反应（CO2RR）是缓解全球CO2过量排放的有效途径之一.相比于单纯的金属催化剂,金属硫化物普遍具有更高的甲酸盐选择性及活性,因此被认为是一类独特的CO2RR电催化剂.然而,该类催化剂在负电位易发生组分还原,从而导致S元素... 详细信息

电化学CO2还原反应（CO2RR）是缓解全球CO2过量排放的有效途径之一.相比于单纯的金属催化剂,金属硫化物普遍具有更高的甲酸盐选择性及活性,因此被认为是一类独特的CO2RR电催化剂.然而,该类催化剂在负电位易发生组分还原,从而导致S元素大量溢出.在此,我们合成了一系列具有高结晶度的硫化锡（SnS,Sn2S3和SnS2）作为模型催化剂,揭示了Sn–S键强在原子构型上的分布对甲酸盐生成选择性及活性的影响规律.其中,SnS2具有较强且均匀分布的Sn–S键,能够有效抑制S溢出,形成有利于CO2RR的Sn/SnS2异质界面;而SnS的Sn–S键强较弱,导致其在CO2RR过程中快速还原成惰性金属Sn.而具有混合键强的Sn2S3则从最弱的Sn–S键开始断裂,引发了更加快速的组分还原,表现出较差的CO2RR性能.因此,S nS2表现出最高的甲酸盐法拉第效率9 3.8%±0.5 9%(-1.0VRHE)及最高的偏电流密度(195.3 mA cm-2,-1.2 VRHE).该工作为深入理解金属基硫化物中金属-硫键强及其分布对CO2RR制甲酸盐的影响提供一定的科学依据.

关键词： CO2 reduction tin sulfides bond strength formate S loss

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Development of Interpenetrating Phase Structure AZ91/Al_(2)O_(3)Composites with High Stiffness,Superior Strength and Low Thermal Expansion Coefficient

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Acta Metallurgica Sinica(English Letters) 2025年第2期38卷 245-258页

作者： Zhiqing Chen Zhixian Zhao Yiqiang Hao Xiaoling Chen Liping Zhou Jingya Wang Tao Ying Bin Chen Xiaoqin Zeng National Engineering Research Center of Light Alloy Net Forming and State Key Laboratory of Metal Matrix Composite Shanghai Jiao Tong UniversityShanghai 200240China School of Materials Science and Engineering Shanghai Jiao Tong UniversityShanghai 200240China Department of Mechanical Engineering the University of Hong KongPok Fu Lam RoadHong KongChina

Mg alloys have the defects of low stiffness,low strength,and high coefficient of thermal expansion(CTE).The composites strategy and its architecture design are effective approaches to improve the comprehensive performance of materials,but the processing difficulty,especially in ceramics forming,limits the control and innovation of material ***,combined with 3D printing and squeeze infiltration technology,two precisely controllable architectures of AZ91/Al_(2)O_(3)interpenetrating phase composites(IPC)with ceramic scaffold were *** interface,properties and impact of different architecture on IPC performance were studied by experiments and finite element *** metallurgical bonding of the interface was realized with the formation of MgAl_(2)O_(4)reaction *** IPC with 1 mm circular hole scaffold(1C-IPC)exhibited significantly improved elastic modulus of 164 GPa,high compressive strength of 680 MPa,and good CTE of 12.91×10^(-6)K^(−1),which were 3.64 times,1.98 times and 55%of the Mg matrix,*** elastic modulus,compressive strength,and CTE were superior to the vast majority of Mg alloys and Mg based *** reinforcement and matrix were bicontinuous and interpenetrating each other,which played a critical role in ensuring the potent strengthening effect of the Al_(2)O_(3)reinforcement by efficient load *** the same volume fraction of reinforcements,compared to IPC with 1 mm hexagonal hole scaffold(1H-IPC),the elastic modulus and compressive strength of 1C-IPC increased by 15%and 28%,respectively,which was due to the reduced stress concentration and more uniform stress distribution of *** shows great potential of architecture design in improving the performance of *** study provides architectural design strategy and feasible preparation method for the development of high performance materials.

关键词： Interpenetrating phase composites Al_(2)O_(3)/Mg composites Interface Elastic modulus Compressive strength Coefficient of thermal expansion(CTE)

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White LED - Driven hydrogen production: Tantalum oxide supported g-C3N4 sheets as a Pt-free catalyst

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International Journal of Hydrogen Energy 2025年 130卷 423-433页

作者： Gupta, Aayush Brar, Loveleen K. Jaidka, Sachin Kamal, Khaja Mohaideen Gyergyek, Sašo Likozar, Blaž Department of Mechanical Engineering GLA University Mathura281406 India Department of Physics and Materials Science Thapar Institute of Engineering and Technology Patiala147004 India Department of Applied Sciences Division of Research & Innovation Chandigarh Engineering College Chandigarh Group of Colleges Jhanjeri Punjab Mohali India Department of Catalysis and Chemical Reaction Engineering National Institute of Chemistry Ljubljana1001 Slovenia Department for Synthesis of Materials Jožef Stefan Institute Jamova Cesta 39 Ljubljana1000 Slovenia

Photocatalytic water splitting offers a promising pathway for clean and sustainable hydrogen gas production. This study explores the enhancement of photocatalytic activity in graphitic carbon nitride (g-C3N4;CN) sheets by incorporating tantalum oxide (T0) powder. The unique band structure and excellent stability of CN sheets make them effective photocatalysts. However, limited light absorption and rapid exciton recombination often hinder their performance. To overcome these limitations, Ta-oxide particles were introduced onto the surface of CN sheets. This composite design not only enhances visible light absorption and the separation of photogenerated electron-hole pairs but also facilitates efficient charge transfer at the photocatalyst-electrolyte interface. As a result, the T0-supported CN composite demonstrated a remarkable improvement in catalytic performance, achieving a hydrogen evolution rate of 189.11 mmol/g/h (approximately 50 times higher than pristine CN) under 100W white LED illumination. The synergistic interaction between CN and Ta-oxide was thoroughly examined using spectroscopic, photochemical, and morphological characterization techniques. These findings underscore the potential of T0-supported g-C3N4 as a highly efficient photocatalyst for hydrogen production, advancing the development of sustainable energy technologies. © 2025 Hydrogen Energy Publications LLC

关键词： Electrolytes

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La-substituted W-type barium-nickel ferrites for tunable and high-performance electromagnetic wave absorption

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International Journal of Minerals,Metallurgy and materials 2025年第3期32卷 645-656页

作者： Long Wang Jiurong Liu Shenghui Xie Yanli Deng Zhou Wang Shanyue Hou Shengying Yue Gang Wang Na Wu Zhihui Zeng Key Laboratory for Liquid-Solid Structural Evolution and Processing of Materials(Ministry of Education) School of Materials Science and EngineeringShandong UniversityJinan 250061China Electronic Materials Research Laboratory Key Laboratory of the Ministry of Education and International Center for Dielectric ResearchSchool of Electronic Science and EngineeringXi’an Jiaotong UniversityXi’an 710049China Army Engineering University of PLA College of Field Engineering Nanjing 210007China Laboratory for Multiscale Mechanics and Medical Science State Key Laboratory for Strength and Vibration of Mechanical StructuresSchool of AerospaceXi’an Jiaotong UniversityXi’an 710049China Department of Electrical and Computer Engineering Beckman Institute for Advanced Science and TechnologyUniversity of Illinois at Urbana-ChampaignUrbana 61801USA School of Chemistry and Chemical Engineering Shandong UniversityJinan 250100China

W-type barium-nickel ferrite(BaNi_(2)Fe_(16)O_(27))is a highly promising material for electromagnetic wave(EMW)absorption be-cause of its magnetic loss capability for EMW,low cost,large-scale production potential,high-temperature resistance,and excellent chemical ***,the poor dielectric loss of magnetic ferrites hampers their utilization,hindering enhancement in their EMW-absorption *** efficient strategies that improve the EMW-absorption performance of ferrite is highly desired but re-mains ***,an efficient strategy substituting Ba^(2+)with rare earth La^(3+)in W-type ferrite was proposed for the preparation of novel La-substituted ferrites(Ba_(1-x)LaxNi_(2)Fe_(15.4)O_(27)).The influences of La^(3+)substitution on ferrites’EMW-absorption performance and the dissipative mechanism toward EMW were systematically explored and ***^(3+)efficiently induced lattice defects,enhanced defect-induced polarization,and slightly reduced the ferrites’bandgap,enhancing the dielectric properties of the ***^(3+)also enhanced the ferromagnetic resonance loss and strengthened magnetic *** effects considerably improved the EMW-absorption perform-ance of Ba_(1-x)LaxNi_(2)Fe_(15.4)O_(27)compared with pure W-type *** x=0.2,the best EMW-absorption performance was achieved with a minimum reflection loss of-55.6 dB and effective absorption bandwidth(EAB)of 3.44 GHz.

关键词： electromagnetic wave absorption W-type barium ferrite rare earth dielectric

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Shape Memory Alloy Reinforced Self-Healing Aluminum Composites for Energy Conservation

Shape Memory Alloy Reinforced Self-Healing Aluminum Composit...

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Advances in Sustainable Composites: Eco-friendly Solutions and Applications was part of the 154th Annual Meeting and Exhibition, TMS 2025

作者： Bellah, Masum Srivastava, Vaibhav Nosonovsky, Michael Church, Benjamin Rohatgi, Pradeep Department of Mechanical Engineering University of Wisconsin-Milwaukee MilwaukeeWI United States Department of Materials Science and Engineering University of Wisconsin-Milwaukee MilwaukeeWI United States

ISBN: (纸本)9783031810565

engineering components are frequently discarded after they develop cracks, requiring replacement with new high embodied energy components. In this paper, self-healingSelf-healingaluminumAluminum matrix compositesComposite with the capability of self-healing are discussed. These compositesComposite can self-heal cracks, thereby extending component life and conserving energy by reducing the need for replacements. Research on aluminumAluminum alloy compositesComposite reinforced by shape memory alloys is presented, including the narrowing and closing of cracks, the recovery of strength, and shape restoration in these alloys. The microstructures of these self-healingSelf-healing alloy compositesComposite and the mechanics and kinetics of self-healing, including the rate of crack narrowing and closing and the rate of shape restoration, are also reportedBiomimetics. © The Minerals, Metals & materials Society 2025.

关键词： Cracks

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