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Transactions of Nonferrous Metals Society of China 2022年

作者： hamed JAMSHIDI AVAL Department of Materials Engineering， Babol Noshirvani University of Technology， Shariati Avenue

This research has studied the effect of artificial aging heat treatment on the microstructure and corrosion behavior of Al-Zn-Mg-Cu alloy matrix composite. In the present study， nickel-aluminide reinforcement was fabricated in-situ during the stir casting process of Al-Zn-Mg-Cu alloy. After friction surfacing of an as-cast composite consumable rod on AA1050 substrate and post-processing artificial aging heat treatment at 125 ℃ for 18 hours， significant grain growth was observed in the nickel-free sample. Moreover， the presence of nickel-aluminide reinforcement in the microstructure of composite resulted in the formation of bimodal microstructure. The presence of nickel-rich particles and the strengthening mechanism through precipitates could help increase the hardness and strength in the nickel-containing sample. After artificial aging heat treatment， the shear strength and hardness of composite containing nickel-aluminide increased 24 and 13%， respectively， more than those in the aluminum matrix. Before aging heat treatment， the pitting corrosion resistance was significantly improved by the presence of nickel-containing particles. After aging heat treatment due to the adsorption of more significant amounts of soluble copper by nickel-rich particles in the nickel-containing sample， corrosion resistance decreased 39% compared to the nickel-free sample.

关键词：

1050 铝合金基板上 Al−Mg−Si−Cu_((p))复合涂层的构建

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中国有色金属学报:英文版 2023年第9期33卷 2599-2612页

作者： hamed JAMSHIDI AVAL Department of Materials Engineering Babol Noshirvani University of TechnologyShariati AvenueBabol 47148-71167Iran

利用摩擦堆焊工艺在AA1050铝合金基板上制备铜颗粒增强AA6061铝合金基复合材料涂层。研究耗材棒的增强相含量和预涂层热处理条件对涂层显微组织和力学性能的影响。结果表明,使用T6处理的耗材棒和增加铜含量使摩擦堆焊过程的温度升高。... 详细信息

利用摩擦堆焊工艺在AA1050铝合金基板上制备铜颗粒增强AA6061铝合金基复合材料涂层。研究耗材棒的增强相含量和预涂层热处理条件对涂层显微组织和力学性能的影响。结果表明,使用T6处理的耗材棒和增加铜含量使摩擦堆焊过程的温度升高。随着铜粉含量的增加,使用经T6处理和固溶态耗材棒制备的涂层的平均晶粒尺寸均减小,且与T6处理相比,用固溶态耗材棒制备的涂层的平均晶粒尺寸细16%。当铜的质量分数增加至20%时,使用T6处理耗材棒和固溶态耗材棒制备的涂层的耐磨性分别比AA1050基板提高了28%和24%。此外,使用T6处理和添加20%铜(质量分数)的耗材棒制备的涂层的剪切强度、硬度和耐磨性分别比使用固溶态耗材棒制备的涂层提高了4%、8%和5%。

关键词： AA6061基复合材料摩擦堆焊显微组织预涂层热处理

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Effect of non-isothermal aging on microstructure and corrosion behaviors of multilayered friction surfaced Al-Mg-Si alloy with Ag additive

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Transactions of Nonferrous Metals Society of China 2022年

作者： hamed JAMSHIDI AVAL Department of Materials Engineering， Babol Noshirvani University of Technology， Shariati Avenue

In this study， the influence of non-isothermal aging on the microstructure and corrosion behavior of multilayer friction surfaced Al-Mg-Si alloy with different amounts of silver additive was investigated. The silver in 4， 8， and 13 weight percentages is inserted into the consumable rods by drilling holes in the cross section of the consumable rods. The coating microstructure was studied using light and electron microscopy， the mechanical properties of coatings were studied using microhardness and tensile tests， and the corrosion resistance of samples was studied using electrochemical testing. The results show that the grain size of friction surfaced layers decreases from 1.5 ± 0.3 to 1.0 ± 0. 3 μm with increasing the percentage of silver additive from 4 to 13 wt.%. The solute silver in the aluminum matrix increases the precipitation kinetics in the Al-Mg-Si alloy. After non-isothermal aging， the yield and tensile strength in the silver containing coating are 50.6 and 43.5% higher than the silver-free coating， respectively. Non-isothermal aging treatment reduces corrosion current density and increases corrosion resistance in both samples with and without silver additive. The corrosion resistance of the silver-containing coating is 96.5% higher after non-isothermal aging than the silver-free coating.

关键词：

时效热处理对摩擦堆焊铝基复合材料显微组织和腐蚀行为的影响

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Transactions of Nonferrous Metals Society of China 2023年第8期33卷 2303-2313页

作者： hamed JAMSHIDI AVAL Department of Materials Engineering Babol Noshirvani University of TechnologyShariati Avenue 47148-71167BabolIran

研究人工时效热处理对Al−Zn−Mg−Cu基复合材料显微组织和腐蚀行为的影响。采用搅拌铸造工艺原位制备铝化镍增强Al−Zn−Mg−Cu合金复合材料,采用摩擦堆焊法将该铸态复合材料耗材杆堆焊在AA1050铝合金基体上,并在125℃进行人工时效热处理18 ... 详细信息

研究人工时效热处理对Al−Zn−Mg−Cu基复合材料显微组织和腐蚀行为的影响。采用搅拌铸造工艺原位制备铝化镍增强Al−Zn−Mg−Cu合金复合材料,采用摩擦堆焊法将该铸态复合材料耗材杆堆焊在AA1050铝合金基体上,并在125℃进行人工时效热处理18 h。结果发现,无镍合金中晶粒发生明显长大。此外,复合材料显微组织中铝化镍增强相的存在导致双态组织的形成。富镍颗粒的存在和析出相的强化机制使含镍材料的硬度和强度得到提高。经人工时效热处理后,含铝化镍复合材料的剪切强度和硬度比铝基体分别提高了24%和13%。含镍颗粒的存在显著提高了未热处理合金的耐点蚀性能。经时效热处理后,含镍样品的耐腐蚀性比不含镍样品降低了39%,这是因为含镍样品中的富镍颗粒吸附了更多的可溶性铜。

关键词：铝基复合材料铝化镍增强相摩擦堆焊人工时效热处理腐蚀行为

Correlation between travel experiences and post-COVID outbound tourism intention:a case study from China

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Journal of Zhejiang University-Science A(Applied Physics & Engineering) 2023年第11期24卷 1003-1016页

作者： Yilin SUN Yinan DONG Dianhai WANG EOwen DWAYGOOD hamed NASERI Kazuo NISHII College of Civil Engineering and Architecture Zhejiang UniversityHangzhou 310058China Architectural Design and Research Institute Zhejiang UniversityHangzhou 310028China Alibaba-Zhejiang University Joint Research Institute of Frontier Technologies Zhejiang UniversityHangzhou 310058China Polytechnic Institute Zhejiang UniversityHangzhou 310015China Center for Balance Architecture Zhejiang UniversityHangzhou 310028China Department of Civil Geotechnicaland Mining EngineeringPolytechnique MontréalMontréalH3T 1J4Canada Department of Policy Studies University of Marketing and Distribution SciencesKobe651-2188Japan

The COVID-19 pandemic has devastated global tourism and recovery is proceeding very *** many countries,tourism served as a major economic sector,so investigating how to recover is *** China was the largest source of outbound travelers before the outbreak,study of the factors influencing Chinese intentions to travel overseas in the post-COVID era is *** Apr.2022,among seven provinces(or cities)with the most outbound tourists from 2019 to 2021,2450 individuals responded to a questionnaire on daily mobility,tourism experiences,and the shifts due to the *** gradient boosting machine(LightGBM),a robust ensemble learning method,was adopted to quantify and visualize the impact of explanatory factors on outbound travel *** addition,the Optuna mechanism and Shapley additive explanation(SHAP)instruments were employed for tuning hyperparameters and interpreting results,*** suggest neither one-day nor multi-day tours have resumed to pre-COVID *** frequency of multi-day tours with further destinations,less car utilization in daily shopping trips,and moderate pandemic restrictions can boost the intention to travel *** concerns and desires of different age groups for overseas travel need different *** study reveals the factors affecting Chinese outbound travel intentions and provides suggestions for the recovery of tourism in the post-COVID period.

关键词： Outbound tourism Touring behavior Travel behavior COVID-19 Ensemble learner

Hybrid Additive Manufacturing of Forming Tools

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Automotive Innovation 2023年第3期6卷 311-323页

作者： hamed Dardaei Joghan Ramona Holker‑Jager Anna Komodromos A.Erman Tekkaya Institute of Forming Technology and Lightweight Components(IUL) TU Dortmund UniversityBaroper Stra.e 30344227 DortmundGermany

Additive manufacturing(AM)is widely used in the automotive industry and has been expanded to include aerospace,marine,and *** flexibility and the possibility of manufacturing complex parts in AM motivate the integration of additive manu-facturing with classical forming technologies,which can improve tooling concepts and reduce *** study presents three applications of this ***,the possibility of successful utilization of selective laser melting for manufacturing extrusion tools with complex cooling channels and paths for thermocouples is reported,leading to significantly reduced inner die temperatures during the extrusion ***,sheet lamination is integrated with laser metal deposition(LMD)to manufacture deep-drawing *** results are achieved in reducing the stair step effect,which is the main challenge in sheet lamination,by LMD and following post-processing such as milling,ball burnishing,and laser *** new manufacturing route shows that LMD can economically and efficiently reduce the stair step effect and omit the hardening step from the conventional manufacturing process ***,LMD is used to manufacture a hot stamping punch with improved surface roughness by ball burnishing and near-surface complex cooling *** experimental results show that the manufactured punch has lower temperatures during hot stamping compared with the conventionally manufactured *** study shows the successful integration of AM processes with classical forming processes.

关键词： Additive manufacturing Laser metal deposition Selective laser melting Rapid tooling Forming tool Layer laminated manufacturing

Prediction of pore volume compressibility by a new non-linear equation in carbonate reservoirs

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Energy Geoscience 2022年第3期3卷 290-299页

作者： Milad Farahani hamed Aghaei Mohammad Saki Seyed Reza Asadolahpour Special Core Analysis Lab PetroMakhzan Kav(PMK)TehranIran Petroleum Engineering Department School of Chemical and Petroleum EngineeringShiraz UniversityShirazIran Pasargad E&P Company(PEPC) TehranIran Reservoirs Study Group National Iranian South Oil Company(NISOC)AhvazIran

Pore volume compressibility is an essential parameter in reservoir studies,as it plays a major role in recovery *** the past decades,many attempts have been made to establish a link between the pore compressibility and the porosity and other mechanical properties of the *** scholars introduced analytical correlations between pore compressibility and rock mechanical properties,while others developed empirical formulas for estimating pore compressibility based on a porosity calculated by comparing nonlinear models to laboratory *** this study,pore volume compressibility is measured on 55 carbonate samples and then applied to derive an empirical relationship between pore compressibility and porosity at each stress step,which is useful for predicting pore compressibility based on initial *** take the net stress effect into account and derive an empirical correlation based on net effective stress and initial porosity to predict pore *** the end,we compare the measured pore compressibility with that predicted by the derived correlation and other non-leaner models,which indicates that the newly proposed non-linear equation outperforms those available in literature。

关键词： Pore volume compressibility Net confining pressure Porosity Carbonate

Case study of hydraulic fracturing in an offshore carbonate oil reservoir

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Petroleum Research 2022年第4期7卷 419-429页

作者： Mohammad Azad Mojtaba Ghaedi Amir Farasat Hadi Parvizi hamed Aghaei Department of Petroleum Engineering School of Chemical and Petroleum EngineeringShiraz UniversityIran Iranian Offshore Oil Company TehranIran Petroxin Ltd LondonUnited Kingdom

Maximizing petroleum production while efficiently managing the operational costs is the oil and gas industry's primary goal which requires innovative engineering approaches and production-enhancing treatments such as hydraulic fracturing(HF).During the HF process,the injected fluid mixed with sands or proppants will create permanent fluid channels to drain more of the reservoir *** level of complexity and various constraints involved in real field treatments have made HF even more chal-lenging in layered carbonate reservoirs with the water drive mechanism.A prominent concern is the downward fracture growth to the oil/water contact zone that may cause unfavorable water cut *** fracture height confinement criterion necessitates optimization of fracture dimension *** height development is mainly a function of in-situ stress conditions and stress magnitude differences between geologic *** cases with a water table at the proximity of the wellbore,fracture height directly affects the operational *** paper demonstrates a practical step-by-step approach towards the design of hydraulic fracturing treatment in an offshore carbonate oil *** modeling process involves optimization of the location,number,and conductivity of the proposed ***-jection of high viscosity fluid causes a bi-wing vertical planar fracture to propagate perpendicular to the direction of minimum horizontal stress in the strike-slip faulting *** of the induced hydraulic fractures are also impacted by the amount and type of ***,as with this case study,the magnitude of vertical stress is in the same range as the maximum horizontal stress;the fracture height growth is the limiting *** LGR method is used to define fractures in the dynamic reservoir model which has been built based on a complete set of data ranging from the analyses of logs,core samples,and seismic details,to perform production forecasts and economic ev

关键词： Hydraulic fracture design Carbonate reservoirs Proppant selection Economic analysis Reservoir modeling

Effects of graphene oxide/TiO_(2) nanocomposite,graphene oxide nanosheets and Cedr extraction solution on IFT reduction and ultimate oil recovery from a carbonate rock

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Petroleum 2022年第4期8卷 476-482页

作者： Amin Garmroudi Mahdi Kheirollahi Sayed Amirhosein Mousavi Moslem Fattahi Elaheh hamed Mahvelati Department of Petroleum Engineering Abadan Faculty of Petroleum EngineeringPetroleum University of Technology(PUT)AbadanIran Department of Chemical Engineering Abadan Faculty of Petroleum EngineeringPetroleum University of Technology(PUT)AbadanIran Department of Basic Sciences Abadan Faculty of Petroleum EngineeringPetroleum University of Technology(PUT)AbadanIran

Increasing the number of depleted reservoirs and global demand for energy have left us with low alternative but to use new ways to extract more *** different material used for tertiary oil recovery,surfactant injection has proved very promising solutions,such as interfacial tension reduction and wettability *** any harm to the environment and meanwhile being economically feasible,natural surfactants have been attracted researchers in recent *** extraction which is produced from Zizyphus Spina Christi leaves has shown some beneficial characteristics like IFT reduction and wettability ***,the amount of IFT reduction is not considerable,so we decided to augment its effectiveness by adding two different *** this investigation,three concentrations(0.01,0.05 and 0.1 wt%)of both graphene oxide(GO)nanosheet and GO/TiO_(2) nanocomposite was added to Cedr extraction solution to study their potential on IFT reduction and improving the ultimate oil *** concentration of 0.05 wt percent showed the lowest IFT in both *** this concentration,the IFT of GO/TiO_(2)-augmented solution and GO-augmented solution were measured of 10.5 and 12.3 mN/m,*** the bare Cedr solution showed 23.8 mN/m at its critical micelle *** coreflooding tests were also performed at the aforementioned *** oil recovery reached to 65%of original oil volume in GO/TiO_(2)-augmented solution,compared to 56% in GO-augmented solution case and 40%in bare Cedr solution *** Electron Microscopy images were also taken from the rock samples exposed to nanofluids to investigate any severe harm to the *** showed low tendency of both particles to adsorb on rock surface and plug large pores.

关键词： Cedr extraction Coreflooding GO nanosheet GO-TiO_(2)nanocomposite IFT reduction Enhanced oil recovery

Relationship between gravitational flap structures in the backlimb of anticlinal breakthrough Fault-Propagation Folds:case study of the Southern-Central Tunisian Atlas

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Journal of Mountain Science 2023年第12期20卷 3525-3541页

作者： Soulef AMAMRIA Hassen BENSALEM Hassan TAIB Mohamed Sadok BENSALEM Riheb HADJI Younes hamed Faculty of Sciences Gabès Erriadh City Gabès University of GabèsErriadh city 6072Tunisia Higher Institute of Water Sciences and Techniques of Gabès University of GabèsErriadh city 6072Tunisia Faculty of Earth Sciences and Architecture Larbi Ben M’hidi UniversityOum El Bouaghi 4000Algeria Institute of Architecture and Earth Sciences Setif 1UniversitySetif city 19000Algeria Faculty of Sciences of Gafsa University of GafsaSidi Ahmed zarroug 2100Tunisia

The development of orogenic belts structures in the Southern-Central Tunisian Atlas is influenced by the evolution of tectonic activities during different phases,which are also closely linked to the formation of gravitational collapse *** typical example is that of the northern flank of the Jebel Orbata particularly the Ben Zannouch *** is an asymmetrical anticline interpreted by the model of“Fault Propagation Folds”.The development of the Ben Zannouch structures is resulted from landslides,scree falls and inverted layers plunging to the *** direction of resulted gravitational structure is parallel to the main thrust direction of the Bou Omrane *** thrust activity of Bou Omrane fault is associated to the important paleo-slope facing south and plastic lithology(incompetent marl layers)of outcropped series,facilitates the development of the Ben Zannouch Flap *** definition of gravitational collapse structures for the first time in Tunisia particularly in the northern flank of the Jebel Orbata is controlled by many principal structural conditions:fragmentation of the landslide surfaces,rheology and *** regional factors can be distinguished in the Southern-Central Tunisian Atlas as the seismic activity of the pre-existing Gafsa fault reactivated during compressive phases and the weather conditions during the postglacial period.

关键词： Southern-Central Tunisian Atlas Gravitational collapses structures Paleo-slope Gafsa fault