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Evolution of microstructures during isothermal annealing in hot-rolled Al-Mn alloys

Keikinzoku/Journal of Japan Institute of Light Metals 2025年第3期75卷 137-143页

作者： Torigoe, Shoma Nakashima, Yosuke Tsuzuki, Yusho Takata, Ken Ikeda, Ken-Ichi Ii, Seiichiro Department of Mechanical Engineering Daido University 10-3 Takiharucho Minami-ku Aichi Nagoya-shi457-8530 Japan Department of Mechanical Engineering Daido University Aichi Nagoya-shi Japan Division of Materials Science and Engineering Faculty of Engineering Hokkaido University Hokkaido Sapporo-shi Japan Ibaraki Tsukuba-shi Japan

Effect of annealing in hot-rolled Al-Mn alloys on evolution of microstructures was investigated using hardness measurement, electrical-resistivity measurement, backscattered electron images, and its image analysis. Electrical resistivity with annealing time exhibited that residual content of solute Mn and Fe atoms remained in hot-rolled alloys, and that their number was decreased during annealing. Analysis of backscattering electron image of scanning electron microscopy provided that a lot of precipitates grew by consumption of such solute atoms. We considered that the growth of precipitates during isothermal annealing affect recovery and recrystallization and then hardness behavior. © 2025 The Japan Institute of Light Metals.

关键词： Manganese alloys

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Modelling of Shallow Drawing of Aluminium Alloy AA2014 Thin Sheet Using FE Simulations

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Journal of The Institution of Engineers (India): Series D 2023年第2期104卷 699-704页

作者： Narender, G. Ramjee, E. Janaki Ramulu, Perumalla Eswara Prasad, N. Department of Mechanical Engineering Vignan Institute of Technology and Science Hyderabad508 284 India Department of Mechanical Engineering JNTUH College of Engineering Hyderabad500 085 India School of Mechanical Chemical and Materials Engineering Adama Science and Technology University Adama Ethiopia DRDO Kanpur208 013 India

The aluminium alloy exhibits excellent isotropy in mechanical properties, with good weldability and corrosion/oxidation resistance, and shows limited shallow drawing formability. In this paper, forming characteristics of aluminium alloy AA2014 forged sheet are systematically investigated using numerical simulation, based on elasto-plastic deformation parameters using Finite Element Analysis (FEA) code PAM-STAMP 2G. Parameters like blank diameters at three levels with five varied coefficients of friction using an optimized mesh size are used to model and simulate the shallow drawing process of AA2014 alloy sheet of 1 mm thickness. The stress distribution, the maximum and minimum principal stresses, the strain distribution, and variation in thickness during cup formation have been determined by simulation. The thickness variation along with strain distributions from the simulated data has been compared and validated, as also for punch forces and displacements. The FE simulation results of variation in punch force outcomes of the experiment were found to be in good accord. © 2022, The Institution of Engineers (India).

关键词： Aluminum alloys

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Sound innovations for biofabrication and tissue engineering

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Microsystems & Nanoengineering 2024年第6期10卷 1-19页

作者： Mengxi Wu Zhiteng Ma Zhenhua Tian Joseph T.Rich Xin He Jianping Xia Ye He Kaichun Yang Shujie Yang Kam W.Leong Luke P.Lee Tony Jun Huang School of Mechanical Engineering Dalian University of TechnologyDalian 116086 LiaoningChina Thomas Lord Department of Mechanical Engineering and Materials Science Duke UniversityDurhamNC 27708USA Department of Mechanical Engineering Virginia Polytechnic Institute and State UniversityBlacksburgVA 24060USA Department of Biomedical Engineering Duke UniversityDurhamNC 27708USA Renal Division and Division of Engineering in Medicine Department of MedicineBrigham and Women’s HospitalHarvard Medical SchoolBostonMA 02115USA Department of Biomedical Engineering Columbia UniversityNew YorkNY 10027USA

Advanced biofabrication techniques can create tissue-like constructs that can be applied for reconstructive surgery or as in vitro three-dimensional(3D)models for disease modeling and drug *** various biofabrication techniques have recently been widely reviewed in the literature,acoustics-based technologies still need to be *** rapidly increasing number of publications in the past two decades exploring the application of acoustic technologies highlights the tremendous potential of these *** this review,we contend that acoustics-based methods can address many limitations inherent in other biofabrication techniques due to their unique advantages:noncontact manipulation,biocompatibility,deep tissue penetrability,versatility,precision in-scaffold control,high-throughput capabilities,and the ability to assemble multilayered *** discuss the mechanisms by which acoustics directly dictate cell assembly across various biostructures and examine how the advent of novel acoustic technologies,along with their integration with traditional methods,offers innovative solutions for enhancing the functionality of *** technologies are poised to address fundamental challenges in biofabrication and tissue engineering and show promise for advancing the field in the coming years.

关键词： acoustics limitations innovative

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A review of control strategies used for morphing aircraft applications

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Chinese Journal of Aeronautics 2024年第4期37卷 436-463页

作者： Muhammed S.PARANCHEERIVILAKKATHIL Jafar S.PILAKKADAN Rafic M.AJAJ Mohammadreza AMOOZGAR Davood ASADI Yahya ZWEIRI Michael I.FRISWELL Department of Aerospace Engineering Khalifa University of Science and TechnologyAbu DhabiUnited Arab Emirates Department of Aerospace Engineering Advanced Research and Innovation Center(ARIC)Khalifa University of Science and TechnologyAbu DhabiUnited Arab Emirates Department of Mechanical Materials&Manufacturing EngineeringUniversity of NottinghamNottingham NG72RDUK Department of Aerospace Engineering Adana Alparslan Turkes Science and Technology UniversityTurkey College of Engineering Swansea UniversitySwansea SA18ENUK

This paper reviews the various control algorithms and strategies used for fixed-wing morphing aircraft applications. It is evident from the literature that the development of control algorithms for morphing aircraft technologies focused on three main areas. The first area is related to precise control of the shape of morphing concepts for various flight conditions. The second area is mainly related to the flight dynamics, stability, and control aspects of morphing aircraft. The third area deals mainly with aeroelastic control using morphing concepts either for load alleviation purposes and/or to control the instability boundaries. The design of controllers for morphing aircraft/wings is very challenging due to the large changes that can occur in the structural, aerodynamic, and inertial characteristics. In addition, the type of actuation system and actuation rate/speed can have a significant effect on the design of such controllers. The aerospace community is in strong need of such a critical review especially as morphing aircraft technologies move from fundamental research at a low Technology Readiness Level(TRL) to real-life applications. This critical review aims to identify research gaps and propose future directions. In this paper, research activities/papers are categorized according to the control strategy used. This ranges from simple Proportional Integral Derivative(PID) controllers at one end to complex robust adaptive controllers and deep learning algorithms at the other end. This includes analytical, computational, and experimental studies. In addition, the various dynamic models used and their fidelities are highlighted and discussed.

关键词： Control strategies Morphing aircraft Shape morphing Flight dynamics Aeroelasticity

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Crevice corrosion of reinforcing steel in carbonated simulated concrete pore solutions contaminated by chloride

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Journal of Iron and Steel Research International 2025年第1期32卷 293-311页

作者： Peng-peng Wu Yuan-pei Gong Shao-hua Zhang Yue-zhong Zhang Bao-sheng Liu Guang-ling Song College of Materials Science and Engineering Taiyuan University of Science and TechnologyTaiyuan030024ShanxiChina College of Chemical Engineering and Technology Taiyuan University of Science and TechnologyTaiyuan030024ShanxiChina Department of Ocean Science and Engineering Southern University of Science and TechnologyShenzhen518055GuangdongChina School of Mechanical and Mining Engineering Centre for Advanced Materials Processing and Manufacturing(AMPAM)The University of QueenslandSt LuciaQLD4072Australia State Key Laboratory of Physical Chemistry of Solid Surfaces Xiamen UniversityXiamen361005FujianChina

The crevice corrosion of the reinforcing steel in the carbonated simulated concrete pore solutions(SCPSs)containing 0.04 mol/L chloride was *** comparison,the steel without crevice covered on its surface was also *** showed that the crevice corrosion in the uncarbonated SCPS was not triggered and the steel remained passivity by suppressing the anodic dissolution in the crevice *** SCPS was carbonated to have pH values of 10.5 and 11.5,the crevice corrosion was easier to be activated than the widely reported pitting corrosion owing to the rapid oxygen depletion within the crevice,but the crevice corrosion damage might be alleviated to a certain extent due to the relative compact surface film formed inside the *** further carbonation led to the activation dissolution of both the crevice interior and exterior,causing the more serious corrosion *** process of the crevice corrosion was systematically analyzed by combining the electrochemical measurement results and Evens polarization diagram.

关键词： Crevice corrosion Reinforcing steel Carbonation Electrochemical test Rust Evens polarization diagram

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Track-Rex:A universal toolbox for tracking recrystallization nucleation and grain growth behaviors in polycrystalline materials

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Journal of materials science & Technology 2024年第30期197卷 149-159页

作者： Xun Zeng Haoran Yi Zhuoran Zeng Liang Yuan Sangbong Yi Junheng Gao Mark Rainforth Dikai Guan Department of Mechanical Engineering University of SouthamptonSouthamptonSO171BJUK College of Engineering and Computer Science Australian National UniversityACT 2601Australia College of Bioresources Chemical and Materials Engineering Shaanxi University of Science and TechnologyXi’an710021China Institute of Materials and Process Design Helmholtz-Zentrum HereonGeesthacht21502Germany Department of Materials Science and Engineering University of SheffieldSheffieldS13JDUK Institute for Carbon Neutrality University of Science and Technology BeijingNo.30 Xueyuan RoadHaidian DistrictBeijing100083China

Recrystallization annealing is widely used to tailor the microstructure and enhance the performance of cold-deformed metallic ***,the underlying recrystallization mechanisms are debated,even with the use of cutting-edge characterization ***,we develop a Track-Rex toolbox to analyze quasi-in-situ electron backscatter diffraction(EBSD)datasets of two magnesium(Mg)alloys dur-ing static recrystallization via grain *** results show that the recrystallized grains do not always grow;instead,they can shrink or even be *** is attributed to the presence of newly formed recrystallized grains that possess a growth advantage over the old recrystallized *** rare earth containing Mg-2.4Zn-0.2Ce wt.%(ZE20)alloy exhibits a higher nucleation activity in the shear bands compared to the commercial Mg-3Al-1 Zn(AZ31)*** of the nucleation timing and sites,re-crystallized grains in the ZE20 alloy show consistent off-basal orientations,serving as the origin of the rare earth ***,the off-basal texture of these recrystallized grains is further strengthened through preferential growth during subsequent *** the contrary,the recrystallized grains in the AZ31 exhibit scattered basal orientations that grow uniformly,resulting in a weak basal texture.

关键词： Grain correlation Grain tracking Recrystallization Texture Mg alloys

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Temperature-dependent microstructural evolution in a compositionally complex solid electrolyte:The role of a grain boundary transition

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Journal of Advanced Ceramics 2025年第3期14卷 163-176页

作者： Shu-Ting Ko Chaojie Du Huiming Guo Hasti Vahidi Jenna L.Wardini Tom Lee Yi Liu Jingjing Yang Francisco Guzman Timothy J.Rupert William J.Bowman Shen J.Dillon Xiaoqing Pan Jian Luo Aiiso Yufeng Li Family Department of Chemical and Nano Engineering University of California San DiegoLa JollaCalifornia 92093USA Program in Materials Science and Engineering University of California San DiegoLa JollaCalifornia 92093USA Department of Materials Science and Engineering University of California IrvineIrvineCalifornia 92697USA Department of Physics and Astronomy University of California IrvineIrvineCalifornia 92697USA Irvine Materials Research Institute University of California IrvineIrvineCalifornia 92697USA

Compositionally complex solid electrolyte(Li_(0.375)Sr_(0.4375))(Ta_(0.375)Nb_(0.375)Zr_(0.125)Hf_(0.125))O_(3)(LSTNZH)samples are synthesized using different sintering temperatures,durations,and cooling conditions(furnace cooling(FC)*** quenching(AQ)).The temperature-dependent grain growth has been examined to investigate the microstructural evolution and the origin of exaggerated(abnormal)grain *** moderate temperatures,the grain growth of LSTNZH follows a cubic root growth model with an Arrhenius temperature *** increasing temperature,bimodal microstructures develop,and the Arrhenius temperature dependence breaks ***,increasing the temperature induces increased Nb segregation at general grain boundaries(GBs),in contrast to classical GB segregation models but suggesting premelting-like GB disordering,which can explain the observed abnormal grain growth(AGG).In addition,the large grains become faceted with increasing temperature,which occurs concurrently with the temperature-induced transitions in GB segregation and grain growth,thereby further supporting the occurrence of a GB phase-like(complexion)*** impacts on the densification,ionic conductivity,and hardness are also *** work provides a new insight into the fundamental understanding of the grain growth mechanisms of the emergent class of medium-and high-entropy compositionally complex ceramics(CCCs),which is essential for tailoring microstructures and material properties.

关键词： compositionally complex ceramics(CCCs) solid electrolytes perovskite grain growth grain boundary(GB) electron backscatter diffraction(EBSD)

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Ultra-flexible graphene/nylon/PDMS coaxial fiber-shaped multifunctional sensor

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Nano Research 2023年第4期16卷 5541-5547页

作者： Peddathimula Puneetha Siva Pratap Reddy Mallem Sung Cheol Park Seoha Kim Dong Hun Heo Cheol Min Kim Jaesool Shim Sung Jin An Dong-Yeon Lee Kwi-Il Park Department of Robotics and Intelligent Machine Engineering/College of Mechanical and IT Engineering Yeungnam UniversityGyeongsan 38541Republic of Korea School of Materials Science and Engineering Kyungpook National UniversityDaegu 41566Republic of Korea Advanced Material Research Center Kumoh National Institute of TechnologyGumi 39177Republic of Korea School of Mechanical Engineering Yeungnam UniversityGyeongsan 38541Republic of Korea Department of Materials Science and Engineering Kumoh National Institute of TechnologyGumi 39177Republic of Korea

The development of flexible and wearable devices is mainly required for tactile sensing;as such devices can adapt to complicated nonuniform surfaces,they can be applied to the human ***,it remains necessary to simultaneously achieve small-scale,portable,and stable developments in such ***,this work aims at fabricating a novel,lightweight,ultra-flexible,and fiber-shaped coaxial structure with a diameter of 0.51 mm using polydimethylsiloxane/graphene/nylon material,based on piezoresistive and triboelectric *** piezoresistive-based robotic-hand-controlled sensor thus realized exhibits a response time of 120 ms and a fast recovery time of 55 ***,the piezoresistive-based sensors effectively feature whisker/joystick-guided behaviors and also sense the human finger *** to the triboelectric-based selfpowered nanogenerator behavior,the resulting sensor can convert mechanical motion into electrical energy,without adversely affecting human ***,this triboelectric-based human finger sensor can be operated under different bending modes at specific ***,this multifunctional sensor is cost-effective and suitable for various applications,including robotichand-controlled operations in medical surgery,whisker/joystick motions in lightweight drone technology,and navigation with highsensitivity components.

关键词： extremely lightweight ultra-flexible piezoresistive/triboelectric sensor human-machine whisker

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Polar materials for photocatalytic applications:A critical review

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Interdisciplinary materials 2024年第4期3卷 530-564页

作者： Xiaoqing Liu Yu Zhang Cong Wang Lei Shen Department of Mechanical Engineering National University of SingaporeSingaporeSingapore School of Physics Harbin Institute of TechnologyHarbinPR China School of Materials Science and Engineering Engineering Research Center of Optoelectronic Functional MaterialsMinistry of EducationChangchun University of Science and TechnologyChangchunPR China

The critical challenges of the energy crisis and environmental degradation promote innovative approaches for energy ***-based photocatalytic technology,which transforms solar energy into chemical energy,emerges as a promising ***,the practical application of this technology faces several challenges,such as the rapid recombination of photogenerated electrons and holes,significantly limiting photocatalytic *** this review,we provide a detailed discussion,an insightful perspective,and a critical evaluation of recent advances,challenges,and opportunities in the field of photocatalysis using polar *** present a comprehensive examination of the photocatalytic mechanisms,activity,and diverse applications of photocatalysts based on polar *** also briefly discuss the engineering design of polar photocatalysis in experiments and its scalability in the *** review outlines future trends and potential breakthroughs in the photocatalytic field using polar materials,projecting their transformative impact on environmental chemistry and energy engineering.

关键词： 2D Janus structures ferroelectric materials heterostructures photocatalysts polar materials

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Tailoring properties of directed energy deposited Al-Mg alloy by balancing laser shock peening and heat treatment

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Journal of materials science & Technology 2024年第36期203卷 78-96页

作者： Wei Dai Wei Guo Jun Xiao Ying Zhu Zewu Qi Jiaxin Shi Changhao Yin Dongsheng He Jiaxuan Chi Zhandong Wan Baoqiang Cong Minggao Li Hongqiang Zhang School of Mechanical Engineering and Automation Beihang UniversityBeijing100191China School of Materials Science and Engineering Beihang UniversityBeijing100191China Faculty of Materials and Manufacturing Beijing University of TechnologyBeijing100124China Technology Research Department CRRC InstituteBeijing100070China

Wire arc-directed energy deposition(WADED)has shown great advantages and potential in fabricating large-scale aluminum(Al)alloy ***,WADED Al alloys typically exhibit low strength and reliability due to pore defects and lack of work hardening or precipitation *** study utilized a combination of laser shock peening(LSP)and annealing to regulate the microstructure of WADED Al-Mg4.5Mn alloy and enhance mechanical *** effects of LSP and annealing on phase composition,pore distribution,and microstructures at multiple scales were systematically investigated to reveal the mechanical property improving *** results demonstrated that LSP-induced plastic deformation formed a defect-free zone by closing near-surface pore *** created the hardened layer with gradient mechanical properties by inducing gradient changes in grain size,the number of low-angle grain boundaries(LAGBs),and dislocation density along the depth *** annealing process promoted grain coarsening and reduced excessive dislocations and LAGBs,weakening the work harden-ing effect caused by ***,the high-density dislocations and high stored energy generated by LSP accelerated the recrystallization,facilitating growth of near-surface *** defect-free zone,dislocation strengthening,and LAGBs strengthening were responsible for the increase in strength,while the synergistic deformation between hardened layers and soft core facilitated maintaining excellent *** strength and elongation of WADED Al alloy can be synergistically improved by balancing the effects of LSP and heat treatment.

关键词： Wire arc-directed energy deposition Aluminum alloy Laser shock peening Pore distribution Tensile property

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