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International Journal of Minerals,Metallurgy and Materials 2014年第10期21卷 1037-1043页

作者： A.Mosleh M.Ehteshamzadeh r.taherzadeh mousavian Department of Materials Science and Engineering Shahid Bahonar University of Kerman Department of Metallurgy Zanjan Branch Islamic Azad University

In this study, a powder mixture with an Al/TiO2 molar ratio of 10/3 was used to form an r-Al2Ti intermetallic matrix composite （IMC） reinforced with α-Al2O3 ceramic by a novel milling technique, called discontinuous mechanical milling （DMM） instead of milling and ignition of the produced thermite. The results of energy dispersive X-ray spectroscopy （EDX） and X-ray diffraction （XrD） of samples with varying milling time indicate that this fabrication process requires considerable mechanical energy. It is shown that Al2Ti-α-Al2O3 IMC with small grain size was produced by DMM after 15 h of ball milling. Peaks for γ-TLA1 as well as Al2Ti and Al2O3 are observed in XrD patterns after DMM followed by heat treatment. The microhardness of the DMM-treated composite produced after heat treatment was higher than Hv 700.

关键词： composite materials intermetallics alumina titanium aluminide ball milling thermite reaction process

Microstructural and mechanical properties of Al-4.5wt% Cu reinforced with alumina nanoparticles by stir casting method

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International Journal of Minerals,Metallurgy and Materials 2013年第10期20卷 978-985页

作者： N.Valibeygloo r.Azari Khosroshahi r.taherzadeh mousavian Faculty of Materials Engineering Sahand University of Technology Department of Metallurgy Zanjan BranchIslamic Azad University

The microstructure and mechanical properties of A1-4.5wt% Cu Mloy reinforced with different volume fractions （1.5vo1%, 3vo1%, and 5vo1%） of alumina nanoparticles, fabricated using stir casting method, were investigated. CMculated amounts of alumina nanoparticles （about ~50 nm in size） were ball-milled with aluminum powders in a planetary ball mill for 5 h, and then the packets of milled powders were incorporated into molten Al-4.5wt% Cu alloy. Microstructural studies of the nanocomposites reveal a uniform distribution of alumina nanoparticles in the A1-4.5wt% Cu matrix. The results indicate an outstanding improvement in compression strength and hardness due to the effect of nanoparticle addition. The aging behavior of the composite is also evaluated, indicating that the addition of alumina nanoparticles can accelerate the aging process of the Mloy, resulting in higher peak hardness values.

关键词： metallic matrix composites nanocomposites aluminum alumina nanoparticles casting mechanical proper-ties microstructure

Manufacturing of cast A356 matrix composite reinforced with nano- to micrometer-sized SiC particles

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rare Metals 2017年第1期36卷 46-54页

作者： reza taherzadeh mousavian rasoul Azari Khosroshahi Sasan Yazdani Dermot Brabazon Faculty of Materials Engineering Sahand University of Technology Tabriz 65175-4171 Iran Advanced Processing Technology research Centre School of Mechanical and Manufacturing Engineering Dublin City University Dublin 9 Ireland

In this study, large micron-sized Si C particles were fragmented via ball-milling process in the presence of iron and nickel powders, separately, to fabricate composite powders of Fe–Si C and Ni–Si C. Continuous fracturing of brittle Si C powders leads to the formation of multi-modalsized Si C powders with size of from 50 nm to slightly higher than 10 lm after 36-h ball milling. The milled powders were then incorporated into the semisolid melt of A356 aluminum alloy to ease the incorporation of fine Si C particles by using iron and nickel as their carrier *** final as-cast composites were then extruded at 500 °C with a reduction ratio of 9:1. Lower-sized composite powders with slight agglomeration are obtained for the36-h milled Ni–Si C mixture compared to that of Fe–Si C powders, leading to incorporation of Si C particles into the melt with a lower size and suitable distribution for the Ni–Si C mixture. It is found that lower-sized composite particles could release the fine Si C particles into the melt more easily, while large agglomerated composite particles almost remain in its initial form, resulting in sites of stress concentration and low-strength aluminum matrix composites. Ultimate tensile strength(UTS) and yield strength(YS) values of 243 and 135 MPa, respectively, are obtained for the aluminum matrix composite in which nickel acts as the carrier of fine ceramic particles.

关键词： Aluminum matrix composite Semisolid casting Extrusion Ni Fe

Empirical model to predict mass gain of cobalt electroless deposition on ceramic particles using response surface methodology

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rare Metals 2017年第3期36卷 209-219页

作者： Akbar Heidarzadeh reza taherzadeh mousavian rasoul Azari Khosroshahi Yalda A.Afkham Hesam Pouraliakbar Faculty of Engineering Azarbaijan Shahid Madani UniversityTabriz 7200-000Iran Department of Materials Engineering Sahand University of TechnologyTabriz 65175-4171Iran Department of Advanced Materials WorldTech Scientific Research Center(WT-SRC)Tehran 71857-3834Iran

This investigation was undertaken to predict the mass gain （MG） of cobalt electroless deposition （ED） on ceramic SiC *** surface methodology （rSM） based on a full factorial design with three ED parameters and 30 runs was used to conduct the experiments and to establish a mathematical model by means of Design-Expert *** ED parameters considered were pH,bath temperature and ceramic particle *** of variance was applied to validate the predicted *** results of confirmation analysis by scanning electron microscopy （SEM） show that the developed models are reasonably *** pH is the most effective parameter for the ***,the highest mass gain is obtained for the lowest pH,highest bath temperatures and heat-treated SiC *** addition,the developed model shows that the optimal parameters to get a maximum value of mass gain are pH,bath temperature and ceramic particle state of 8,70 ℃ and heat treatment,respectively.

关键词： Electroless deposition Cobalt SiC particles Mathematical model response surface method

Stir casting process for manufacture of Al-SiC composites

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rare Metals 2017年第7期36卷 581-590页

作者： Shahin Soltani rasoul Azari Khosroshahi reza taherzadeh mousavian Zheng-Yi Jiang Alireza Fadavi Boostani Dermot Brabazon Faculty of Materials Engineering Sahand University ofTechnologyTabriz 37200-000Iran School of Mechanical Materials and Mechatronic EngineeringUniversity of WollongongWollongongNSW 2522Australia Advanced Processing Technology research Centre School of Mechanical and Manufacturing EngineeringDublin CityUniversityDublin 9Ireland

Stir casting is an economical process for the fabrication of aluminum matrix composites. There are many parameters in this process, which affect the final microstructure and mechanical properties of the compos- ites. In this study, micron-sized SiC particles were used as reinforcement to fabricate A1-3 wt% SiC composites at two casting temperatures （680 and 850 ℃） and stirring periods （2 and 6 min）. Factors of reaction at matrix/ceramic interface, porosity, ceramic incorporation, and agglomera- tion of the particles were evaluated by scanning electron microscope （SEM） and high-resolution transition electron microscope （HrTEM） studies. From microstructural char- acterizations, it is concluded that the shorter stirring period is required for ceramic incorporation to achieve metal/ce- ramic bonding at the interface. The higher stirring tem- perature （850 ℃） also leads to improved ceramic incorporation. In some cases, shrinkage porosity and intensive formation of A14C3 at the metal/ceramic interface are also observed. Finally, the mechanical properties of the composites were evaluated, and their relation with the corresponding microstructure and processing parameters of the composites was discussed.

关键词： Aluminum matrix composite Microstructure Mechanical properties Stir casting

Superior low cycle fatigue property from cell structures in additively manufactured 316L stainless steel

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Journal of Materials Science & Technology 2022年第16期111卷 268-278页

作者： Luqing Cui Dunyong Deng Fuqing Jiang ru Lin Peng Tongzheng Xin reza taherzadeh mousavian Zhiqing Yang Johan Moverare Department of Management and Engineering Division of Engineering MaterialsLinköping UniversityLinköping SE-58183Sweden Shenyang National Laboratory for Materials Science Institute of Metal ResearchChinese Academy of SciencesShenyang 110016China School of Materials Science and Engineering The University of New South WalesSydneyNSW 2052Australia I-Form Advanced Manufacturing Research CentreDublin City UniversityDublin 9Ireland Ji Hua Laboratory Foshan 528200China

We have investigated the low cycle fatigue(LCF)properties and the extent of strengthening in a dense additively manufactured stainless steel containing different volume fractions of cell structures but having all other microstructure characteristics the *** samples were produced by laser powder bed fusion(L-PBF),and the concentration of cell structures was varied systematically by varying the annealing ***-controlled fatigue experiments performed on samples with a high fraction of cell structures reveal an up to 23 times increase in fatigue life compared to an essentially cell-free sample of the same grain *** electron microscopy characterizations reveal that the cell structures serve as the soft barriers to the dislocation propagation and the partials are the main carrier for cyclic *** cell structures,stabilized by the segregated atoms and misorientation between the adjacent cells,are retained during the entire plastic deformation,hence,can continuously interact with dislocations,promote the formation of nanotwins,and provide massive 3D network obstacles to the dislocation *** compositional micro-segregation caused by the cellular solidification features serves as another nonnegligible strengthening mechanism to dislocation ***,the cell structures with a high density of dislocation debris also appear to act as dislocation nucleation sites,very much like coherent twin *** work indicates the potential of additive manufacturing to design energy absorbent alloys with high performance by tailoring the microstructure through the printing process.

关键词： Additive manufacturing 316L stainless steel Fatigue behavior Cellular structure Nanotwins

Machine Learning Techniques in Predicting Hot Deformation Behavior of Metallic Materials

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Computer Modeling in Engineering & Sciences 2025年第1期142卷 713-732页

作者： Petr Opela Josef Walek Jaromír Kopecek Department of Metallurgical Technologies Faculty of Materials Science and TechnologyVSB–Technical University of OstravaOstrava70800Czech Republic FZU—Institute of Physics of the Czech Academy of Sciences Prague18200Czech Republic

In engineering practice,it is often necessary to determine functional relationships between dependent and independent *** relationships can be highly nonlinear,and classical regression approaches cannot always provide sufficiently reliable ***,Machine Learning(ML)techniques,which offer advanced regression tools to address complicated engineering issues,have been developed and widely *** study investigates the selected ML techniques to evaluate their suitability for application in the hot deformation behavior of metallic *** ML-based regression methods of Artificial Neural Networks(ANNs),Support Vector Machine(SVM),Decision Tree regression(DTr),and Gaussian Process regression(GPr)are applied to mathematically describe hot flow stress curve datasets acquired experimentally for a medium-carbon *** the GPr method has not been used for such a regression task before,the results showed that its performance is the most favorable and practically unrivaled;neither the ANN method nor the other studied ML techniques provide such precise results of the solved regression analysis.

关键词： Machine learning Gaussian process regression artificial neural networks support vector machine hot deformation behavior

Circuit breakers in HVDC systems: state-of-the-art review and future trends

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Protection and Control of Modern Power Systems 2023年第3期8卷 16-31页

作者： Erfan taherzadeh Hamid radmanesh Shahram Javadi G.B.Gharehpetian Department of Electrical Engineering Islamic Azad University Central Tehran BranchTehranIran Electrical Engineering Department Amirkabir University of Technology(Tehran Polytechnic)Tehran ***Iran

High voltage direct current(HVDC)systems are efficient solutions for the integration of large-scale renewable energy sources with the main power *** rapid development of the HVDC grid has resulted in a growing interest in DC circuit breakers(DCCBs).A fast and reliable circuit breaker is a necessary requirement in the development of large scale HVDC *** paper provides a comprehensive review and survey of the HVDC CBs and discusses potential research *** principles and the main features of various DCCBs are described and their merits and shortcomings are also highlighted.

关键词： DC circuit breakers(DCCBs) High voltage direct current(HVDC)system Multi-terminal HVDC(MT-HVDC) Fault current isolation renewable energies Voltage clamping

Emerging potential of progranulin-dependent SorCS2 signaling in healthy and diseased nervous systems

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Neural regeneration research 2025年第9期20卷 2591-2593页

作者： Alena Salasova Anders Nykjær Danish research Institute of Translational Neuroscience DANDrITE-Nordic EMBL Partnership for Molecular Medicine and Centre of Excellence PROMEMODepartment of BiomedicineAarhus UniversityAarhusDenmark

The formation of the mammalian nervous system and its maturation into sensory,motor,cognitive,and behavioral circuits is a complex process that begins during early embryogenesis and lasts until young *** neurodevelopm... 详细信息

关键词： progr jointly CS2

Evaluation of in vitro digestibility of Aspergillus oryzae fungal biomass grown on organic residue derived‑VFAs as a promising ruminant feed supplement

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Journal of Animal Science and Biotechnology 2023年第6期14卷 2614-2629页

作者： Clarisse Uwineza Mohammadali Bouzarjomehr Milad Parchami Taner Sar Mohammad J.taherzadeh Amir Mahboubi Swedish Centre for resource recovery University of Boras50190 BorasSweden

Background As demand for high quality animal feed continues to raise,it becomes increasingly important to mini-mize the environmental impact of feed *** appealing sustainable approach to provide feed fractions is to use organic residues from agro-food *** this regard,volatile fatty acids(VFAs)such as acetic,propionic and butyric acids,derived from bioconversion of organic residues can be used as precursors for production of micro-bial protein with ruminant feed inclusion *** study aims to investigate the in vitro digestibility of the Asper-gillus oryzae edible fungal biomass cultivated on VFAs-derived from anaerobic digestion of *** produced fungal protein biomass,along with hay clover silage and rapeseed meal were subjected to various in vitro assays using two-stage Tilley and Terry(TT),gas,and bag methods to evaluate and compare its digestibility for application in ruminant *** The produced fungal biomass contained a higher crude protein(CP)(41%–49%)and rather similar neutral detergent fiber(NDF)(41%–56%)compared to rapeseed *** rumen in vitro dry matter digestibility(IVDMD)of the fungal biomass in the TT method ranged from 82%to 88%(statistically similar to that of the gas method(72%to 85%)).The IVDMD of fungal biomass were up to 26%and 40%greater than that of hay clover silage and rapeseed meal,*** type of substrate and bag method had pronounced effect on the fermentation products(ammonium-N(NH4+-N),total gas and VFAs).Fungal biomass digestion resulted in the highest release of NH4+-N(340–540 mg/L)and the ratio of acetate to propionate ratio(3.5)among subjected *** The results indicate that gas method can be used as a reliable predictor for IVDMD as well as fermenta-tion ***,the high IVDMD and fermentation product observed for Aspergillus oryzae fungal biomass digestion,suggest that the supplementation of fungal biomass will contribute to improving the rumen diges

关键词： Aspergillus oryzae Fungal biomass In vitro dry matter digestibility ruminant feed Volatile fatty acids