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Fabrication of Fe–TiC–Al_2O_3 composites on the surface of steel using a TiO_2–Al–C–Fe combustion reaction induced by gas tungsten arc cladding

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International Journal of Minerals,Metallurgy and Materials 2016年第2期23卷 193-204页

作者： Mahmood Sharifitabar Jalil Vahdati Khaki mohsen haddad sabzevar Department of Metallurgical and Materials Engineering Faculty of Engineering Ferdowsi University of Mashhad Department of Materials Engineering Faculty of Engineering University of Sistan and Baluchestan

The aim of the present study was to fabricate Fe-TiC-Al2O3 composites on the surface of medium carbon *** this purpose,TiO2-3C and 3TiO2-4Al-3C-xFe（0 ≤ x ≤ 4.6 by mole） mixtures were pre-placed on the surface of a medium carbon steel *** mixtures and substrate were then melted using a gas tungsten arc cladding *** results show that the martensite forms in the layer produced by the TiO2-3C ***,ferrite-Fe3C-TiC phases are the main phases in the microstructure of the clad layer produced by the 3TiO2-4Al-3C *** addition of Fe to the TiO2-4Al-3C reactants with the content from 0 to 20wt%increases the volume fraction of particles,and a composite containing approximately 9vol%TiC and A12O3 particles *** composite substantially improves the substrate *** mechanism by which Fe particles enhance the TiC ＋ A12O3 volume fraction in the composite is determined.

关键词： composite coatings iron-based materials combustion cladding microstructure microhardness

Effect of partition coefficient on microsegregation during solidification of aluminium alloys

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International Journal of Minerals,Metallurgy and Materials 2014年第10期21卷 980-989页

作者： M.H.Avazkonandeh-Gharavol M.haddad-sabzevar H.Fredriksson Department of Metallurgy and Materials Engineering Faculty of Engineering Ferdowsi University of Mashhad Department of Materials Science and Engineering School of Industrial Engineering and Management Royal Institute of Technology

In the modeling of microsegregation, the partition coefficient is usually calculated using data from the equilibrium phase diagrams. The aim of this study was to experimentally and theoretically analyze the partition coefficient in binary aluminum--copper alloys. The sam- ples were analyzed by differential thermal analysis （DTA）, which were melted and quenched from different temperatures during solidifica- tion. The mass fraction and composition of phases were measured by image processing and scanning electron microscopy （SEM） equipped with an energy-dispersive X-ray spectroscopy （EDS） unit. These data were used to calculate as the experimental partition coefficients with four different methods. The experimental and equilibrium partition coefficients were used to model the concentration profile in the primary phase. The modeling results show that the profiles calculated by the experimental partition coefficients are more consistent with the experi- mental profiles, compared to those calculated using the equilibrium partition coefficients.

关键词： aluminum copper alloys solidification partition coefficient microsegregation numerical modeling differential thermal analysis

Effect of filler metal on microstructure and mechanical properties of manganese-aluminum bronze repair welds

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Transactions of Nonferrous Metals Society of China 2017年第3期27卷 507-513页

作者： M.R.MIRZADEHRAHNI B.BEIDOKHTI M.haddad-sabzevar Materials and Metallurgical Engineering Department Faculty of EngineeringFerdowsi University of MashhadMashhadIran

The repair welding of UNS C95700manganese?aluminum bronze plates was done using different filler *** and mechanical properties of welds were *** main microstructural constituents wereα,βandκphases withdifferent *** addition of manganese decreased the percentage ofαphase in the microstructure of weldments from80%(Mn-free weld)to57%(12.5%Mn weld,mass fraction).The morphology ofκphase was lamellar in high nickel specimens andit was changed to a globular morphology for high manganese *** the application of high manganese filler metal yieldedthe higher tensile and bending strengths of weldment compared with the weld using high nickel filler material,the optimummechanical properties of repair welds were obtained using a non-alloy filler material(ERCuAl-A2)for the underlay and highmanganese filler metal(ERCuMnNiAl)for filling *** weld presented an increase of39%in tensile strength compared withthe base metal,and no cracking was observed after bending test.

关键词： manganese.aluminum bronze welding filler metal microstructure mechanical properties

Incremental adaptation strategies for agricultural water management under water scarcity condition in Northeast Iran

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Regional Sustainability 2021年第3期2卷 224-238页

作者： Morteza SALMANI sabzevar Amirreza REZAEI Bagher KHALEGHI Department of Agricultural Extension and Education College of Agricultural Economics and DevelopmentUniversity of TehranKaraj***Iran Department of Forestry and Forest Economics University of TehranKaraj***Iran

Population growth and climate changes as two synergistic phenomena have damaged water resources nationwide and *** water resources available for agriculture is one of the most critical limiting factors in food production enhancement in *** must tackle the challenge of supplying the increasing demands for food due to population *** this purpose,we must get acquainted with how farmers make decisions and their adaptations to water scarcity conditions by studying their adaptation *** this case,we can predict the farmers’behaviors by recognizing the optimal adaptation strategies under water scarcity *** study aims to provide a model to examine and analyze the farmers’behaviors in the realm of water scarcity and the contributing factors to it,facilitating a better understanding of the potential implications of such scarcity,introducing the adaptation changeability procedures for agricultural water management and assistance to farmers to adapt,and developing the actions for mitigating the vulnerability of agriculture sector in *** this study,175 farmers in Northeast Iran were interviewed to conduct an applied research by questionnaire *** research tool was a researcher-made questionnaire designed based on the theoretical literature and designed *** to the research,the model of incremental adaptation strategies could determine the effects of a set of psychological and socioeconomic factors and the formation of adaptation decisions in water resources management under water scarcity *** results indicated that the concern and attitude,farmers’knowledge and technical skill,self-efficiency and risk-taking level,social capital and information availability for farmers,and the internal norm are significantly and positively correlated in this *** results provide a proper understanding of farmers’sustainable decision-making and a perspective on contributing factors to the strategy framework and im

关键词： Agricultural water management Incremental adaptation strategies Water scarcity Climate change Northeast Iran

Processing map and microstructure evaluation of AA6061/Al_2O_3 nanocomposite at different temperatures

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Transactions of Nonferrous Metals Society of China 2017年第6期27卷 1248-1256页

作者： H.R.EZATPOUR S.A.SAJJADI M.haddad sabzevar A.CHAICHI G.R.EBRAHIMI Faculty of Engineering Sabzevar University of New Technology Sabzevar *** Iran Department of Materials Science and Metallurgical Engineering Engineering FacultyFerdowsi University of Mashhad Mashhad Iran Department of Mechanical & Industrial Engineering Louisiana State University Baton Rouge Louisiana 70803 USA Department of Materials and Polymer Engineering Hakim Sabzevari University Sabzevar Iran

Hot compression behavior of Al6061/Al2O3nanocomposite was investigated in the temperature range of350-500°C andthe strain rate range of0.0005-0.5s-1,in order to determine the optimum conditions for the hot workability of *** energy of285kJ/mol for the hot compression test is obtained by using hyperbolic sine *** means of dynamicmaterial model(DMM)and the corresponding processing map,safe zone for the hot workability of AA6061/Al2O3is recognized attemperature of450°C and strain rate of0.0005s-1and at temperature of500°C and the strain rate range of0.0005-0.5s-1,with themaximum power dissipation efficiency of38%.Elongated and kinked grains are observed at400°C and strain rate of0.5s-1due tothe severe deformation.

关键词： nanocomposite hot compression test processing map dynamic recrystallization instability flow

The Effect of Phytohormones on Lavender （Lavandula Angustiflia Mill.） Organogenesis

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Journal of Pharmacy and Pharmacology 2015年第7期3卷 338-344页

作者： Tahmineh Sfandiyari sabzevar Raheleh Ahmadzadeh Ghavidel Setareh foroghian Departman of Agronomy 30Metri Daneshgah Payam Noor Sabzevar Sabzevar Khorasan Razavi 91779 Iran Department of Agroecology Ferdowsi University of Mashhad (FUM) Campus Azadi Sq. P.O. Box. ***. MashhadKhorasan Razavi 91779 Iran Department of Agronomy University of Zabol Bonjar Ave Zabol 96587 Iran

Lavender （L. angustifolia） is a genus of flowering plants in the mint family, Lamiaceae. It is an aromatic shrub with multiple stems growing 30 to 60 cm tall. It is native to Asia, Europe and Mediterranean regions and grows on hilly areas and coastlines. The evergreen leaves are narrow and long and covered in fine hairs, which normally contain the essential oils. The leaves are also pinnately toothed, or pinnate. The plant blooms between April and June, and flowers are purple produced on violet bracts. All parts of the plant have a strong and scented odor and a bitter taste. The flowers and leaves are used as an herbal medicine. Lavender essential oil is extracted by distilling flowers and leaves, Essential oil has higher levels of linalyl acetate （40%）, butyric acid, propionic acid, valeric acid, free linalool. Considering the lack of information about lavender tissue culture, the current experiment＇ was aimed to study the effect of phytohormones on lavender callus induction and organogenesis. The lavender explants （leaf and apical meristem） were cultured onto MS media supplemented with different phytohormones. According to the observations, 5 mg/L NAA and 5 mg/L KIN treatment caused leaf and root formation, which were originally derived t^om dense and green calli. The MS medium containing 5 mg/L IBA and 5 mg/L Kin was effective just on leafy explants so that explants formed into leaves after callus induction. Application of 5 mg/L NAA and 5 mg/L BAP on apical meristem explants produced shoot and root after callus induction. However, complete plants were produced after sub-culturing the samples. In conclusion, MS medium supplemented with 5 mg/L NAA and 5 mg/L BAP was selected as the best medium for lavender tissue culture.

关键词： Lavender tissue culture organogenesis phytohormone.

Assessment of mechanism, type and severity of injury in multiple trauma patients： A cross sectional study of a trauma center in Iran

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Chinese Journal of Traumatology 2017年第2期20卷 75-80页

作者： Hamidreza Reihani Hossein Pirazghandi Ehsan Bolvardi mohsen Ebrahimi Elham Pishbin Koorosh Ahmadi Mahdi Safdarian Soheil Saadat Vafa Rahimi-Movaghar Emergency Medicine Department Imam Reza Hospital Mashhad University of Medical Sciences Mashhad Iran Emergency Medicine Department Shahid Beheshti Hospital Sabzevar University of Medical Sciences Sabzevar Iran Department of Emergency Medicine Alborz University of Medical Sciences Karaj Iran Sina Trauma and Surgery Research Center Tehran University of Medical Sciences Tehran Iran

Purpose： To accurately assess the mechanism, type and severity of injury in Iranian multiple trauma patients of a trauma center. Methods： Patients with multiple traumas referring to the emergency department of Hasheminejad University Hospital in Mashhad, lran, entered this cross sectional study from March 2013 to December 2013. All the patients with injury severity score （ISS）〉 9 were included in this study. Data analysis was performed by SPSS software （Version 11.5） and P values less than 0.05 were considered as significant differences. Results： Among the 6306 hospitalized trauma patients during this period, 148 had ISS〉9. The male fe- male ratio was 80%. The mean age of the patients was （33.5 m 19.3） years. And 71% of the patients were younger than 44 years old. There were 19 （13%） deaths from which 68.5% were older than 44 years old. The mean transfer time from the injury scene to hospital was （55 e 26） minutes. The most frequent mechanisms of injury were motorcycle crashes and falling from height, which together included 66.2% of all the injuries. A total of 84% of hospital deaths occurred after the first 24 h of hospitalization. Head and neck were the most common body injured areas with a prevalence of 111 cases （75%）. Conclusion： Motorcycle crashes have high frequency in lran. Since most victims are young males, injury prevention strategies should be considered to reduce the burden of injuries.

关键词： Accidents trafficInjury severity scoreWounds and injuriesIran

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