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Tool wear mechanisms in axial ultrasonic vibration assisted milling in-situ TiB2/7050Al metal matrix composites

Advances in Manufacturing 2020年第2期8卷 252-264页

作者： Xiao-Fen Liu Wen-Hu Wang Rui-Song Jiang Yi-Feng Xiong Kun-Yang Lin School of Mechanical Engineering Northwestern Polytechnical UniversityXi'an 710072People's Republic of China School of Aeronautics and Astronautics Sichuan UniversityChengdu 610065People's Republic of China

The in-situ TiB2 particle reinforced aluminum matrix composites are materials that are difficult to machine,owing to hard ceramic particles in the *** the milling process,the polycrystalline diamond(PCD)tools are used for machining these materials instead of carbide cutting tools,which significantly increase the machining *** this study,ultrasonic vibration method was applied for milling in-situ TiB2/7050A1 metal matrix composites using a TiAIN coated carbide end milling *** completely understand the tool wear mechanism in ultrasonic-vibration assisted milling(UAM),the relative motion of the cutting tool and interaction of workpiecetool-chip contact interface was analyzed in ***,a comparative experimental study with and without ultrasonic vibration was carried out to investigate the infuences of ultrasonic vibration and cutting parameters on the cutting force,tool life and tool wear *** results show that the motion of the cutting tool relative to the chip changes periodically in the helical direction and the separation of tool and chip occurs in the transverse direction in one vibration period,in ultrasonic vibration assisted cutting.I arge instantaneous acceleration can be obtained in axial ultrasonic vibration *** cutting force in axial direction is significantly reduced by 42%-57%,40%--57%and 44%-54%,at different cutting speeds,feed rates and cutting depths,respectively,compared with that in conventional ***,the tool life is prolonged approximately 2--5 times when the ultrasonic vibration method is *** tool wear pattern microcracks are only found in *** might be of great importance for future research in order to understand the cutting mechanisms in UAM of in-situ TiB2/7050A1 metal matrix composites.

关键词： Aluminum matrix composites ultrasonic vibration Milling Cutting force Tool wear

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Rheological model of semisolid Mg_(2)Si/AM60 composites prepared by ultrasonic vibration treatment

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Rare Metals 2022年第8期41卷 2783-2788页

作者： Yuan-Sheng Rao Hong Yan Jun Wan Department of Materials Processing Engineering School of Mechanical and Electrical EngineeringNanchang UniversityNanchang330031China Key Laboratory of Light Alloy Preparation and Processing in Nanchang City Nanchang330031China

The rheological behavior of semisolid Mg_(2)Si/AM60 composites prepared by ultrasonic vibration treatment was *** effects of primaryα-Mg solid content,the ultrasonic power and the content of reinforcement phase Mg_(2)Si on the apparent viscosity of semisolid composites were *** results show that the apparent viscosity of the semis olid composites increases with the increase in a-Mg solid ***,the apparent viscosity decreases with the increase in ultrasonic power,and the reduction amplitude is higher when the solid content is *** addition,the apparent viscosity increases with the increase in Mg_(2)Si *** on experimental data fitting,the rheological model of semisolid Mg_(2)Si/AM60 composites prepared by ultrasonic vibration was established.

关键词： Semisolid Magnesium matrix composites ultrasonic vibration Apparent viscosity

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Microstructure and mechanical properties of magnesium matrix composite reinforced with carbon nanotubes by ultrasonic vibration

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Rare Metals 2022年第7期41卷 2331-2336页

作者： Cheng-Dong Li Xiao-Jun Wang Wei-Qing Liu Ku Wu Hai-Long Shi Chao Ding Ming-Yi Zheng School of Materials Science and Engineering Harbin Institute of TechnologyHarbin 150001China

A novel approach was successfully developed to fabricate bulk carbon nanotube-reinforced Mg matrix com-posites with uniform carbon nanotubes(CNTs).The approach consists of pre-dispersion and ultrasonic ***-neous and single CNTs on flake Zn powder can be achieved simply by slurry *** pre-dispersed CNTs were added to Mg melt,and then,the melt was ultrasonically *** ultrasonic vibration,the CNTs/Mg-6Zn melt was cast into a metal *** CNTs distribute homoge-neously and singly in the bulk ***,good interfacial bonding is achieved,and Raman spectroscopy analysis shows that the damage to CNTs is ***,CNTs evidently improve the ultimate tensile strength,yield strength and *** Kelly-Tyson formula agrees well with the experimental tensile value,and the load-transfer efficiency is nearly equal to 1.

关键词： Magnesium matrix composite Carbon nanotubes ultrasonic vibration Microstructure Mechanical properties

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Hot-Dip Coating of Lead-free Aluminum on Steel Substrates with ultrasonic vibration

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Journal of Materials Science & Technology 2008年第1期24卷 41-44页

作者： Y. Tsunekawa S. Tamura M. Okumiya N.Ishihara Toyota Technological Institute Tempaku Nagoya 468-8511 Japan

Hot-dip coating has been practically employed in manufacturing zinc alloy coated steel ***,it is difficult to coat aluminum alloy on a bulky steel substrate without sufficient preheating,because a rapidly solidified layer containing gas babbles is formed on a substrate surface.A variety of iron-aluminides are also formed at the interface of a steel and aluminum hot-dip coating system,which is the main difficulty in joining of steel with *** vibration was applied to a steel substrate during hot-dip coating of aluminum alloy to control a rapidly solidified layer and a brittle reaction *** dipping of columnar steel substrates into molten aluminum alloy （Al-2.7 mass fraction Si-4.6 mass fraction Sn） was carried out through the use of a Langevin oscillator with resonant frequency of 19.5 *** application of ultrasonic vibration is quite effective to control a rapidly solidified layer and a surface oxide layer from a substrate surface by the sonocapillary effect based on a cavitation phenomenon,so that the intimate contact is achieved at the beginning of hot-dip *** application of ultrasonic vibration to hot-dipping is effective to control a reaction layer with less than 5 #m in *** impact test exhibits that the good adhesive strength is approved in hot-dipped aluminum coatings with a thin reaction layer of approximately 5μm.

关键词： ultrasonic vibration Cavitation Sono-Capillary effect Hot-dip coating

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Analytical model of cutting force in axial ultrasonic vibration-assisted milling in-situ TiB_(2)/7050Al PRMMCs

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Chinese Journal of Aeronautics 2021年第4期34卷 160-173页

作者： Xiaofen LIU Wenhu WANG Ruisong JIANG Yifeng XIONG Kunyang LIN Junchen LI Chenwei SHAN Key Laboratory of High Performance Manufacturing for Aero Engine Ministry of Industry and Information TechnologySchool of Mechanical EngineeringNorthwestern Polytechnical UniversityXi'an 710072China Engineering Research Center of Advanced Manufacturing Technology for Aero Engine Ministry of EducationSchool of Mechanical EngineeringNorthwestern Polytechnical UniversityXi'an 710072China School of Aeronautics and Astronautics Sichuan UniversityChengdu 610065China

ultrasonic vibration-assisted milling has been widely applied in machining the difficultto-cut materials owing to the remarkable improvements in reducing the cutting ***,analytical models to reveal the mechanism and predict the cutting force of ultrasonic vibrationassisted milling metal matrix composites are still needed to be *** this paper,an analytical model of cutting force was established for ultrasonic vibration-assisted milling in-situ TiB_(2)/7050 Al metal matrix *** modeling,change of motion of the cutting tool,contact of toolchip-workpiece and acceleration of the chip caused by ultrasonic vibration was considered based on equivalent oblique cutting ***,material properties,tool geometry,cutting parameters and vibration parameters were taken into ***,the developed analytical force model was validated with and without ultrasonic vibration milling experiments on in-situ TiB_(2)/7050 Al metal matrix *** predicted cutting forces show to be consistent well with the measured cutting ***,the relative error of instantaneous maximum forces between the predicted and measured data is from 0.4%to 15.1%.The analytical model is significant for cutting force prediction not only in ultrasonic-vibration assisted milling but also in conventional milling in-situ TiB_(2)/7050 Al metal matrix composites,which was proved with general applicability.

关键词： Al-MMCs Analytical model Cutting force In-situ Milling TiB_(2)particles ultrasonic vibration

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Effect of ultrasonic vibration on the dechromisation corrosion of a CuCr alloy in HCl solution

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Rare Metals 2007年第4期26卷 398-402页

作者： XU Tao GAO Huawei LIU Jianhua YU Cuiyan Department of Applied Technology Daqing Pelroleum Institute Daqing 163318 China Logistics Groups Company Yanshan University Qinhuangdao 066004 China Key Laboratory of Metastable Materials Science and Technology Yanshan University Qinhuangdao 066004 China

The effect of ultrasonic vibration on the dechromisation corrosion of a CuCr alloy in HC1 solution was studied and the corrosion mechanisms were analyzed. It is found that ultlasonic vibration reduces the dechromisation incubation time, accelerates the dechromisafion corrosion rate, decreases the temperature and concentration of HC1 solution, and when the dechromisation occurs it seriously weakens the microstmcture of dechromisation layer. It is concluded that ultrasonic vibration can accelerate destruction of the passivation film on the Cr surface and increase the activities of Cl^- and Cr.

关键词： CuCr alloy dechromisation corrosion ultrasonic vibration passivation film

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Influence of non-uniform ultrasonic vibration on casting fluidity of liquid aluminum alloy

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China Foundry 2022年第5期19卷 380-386页

作者： Zi-heng Han Zhi-ming Wang Zhi-ping Sun Bing-rong Zhang Wei-feng Rao School of Mechanical Engineering Qilu University of Technology(Shandong Academy of Sciences)Jinan 250353China

The application of ultrasonic vibration to the casting process can be realized through mould(die)***,the resonant vibration of the mould is always accompanied by a non-uniform vibration distribution at different parts,which may induce a complex liquid flow and affect the casting fluidity during the mould filling *** influence of non-uniform ultrasonic vibration on the fluidity of liquid AlSi9Cu3 alloy was studied by mould vibration with different vibration *** is found that ultrasonic mould vibration can generate two opposite effects on the casting fluidity:the first,ultrasonic cavitation in melt induced by mould vibration promotes the casting fluidity;the second,the non-uniform mould vibration can induce a melt flow toward the weak vibration areas and turbulence there,consequently decreasing the casting *** the melt flow and turbulence are violent enough to offset the promoting effect of cavitation on fluidity,the ultrasonic vibration will finally induce a resultant decrease of casting *** decreasing effect is proportional to the vibration gradient.

关键词： ultrasonic vibration vibration gradient aluminum alloy fluidity

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Individual and combined influences of main loading parameters on granite damage development under ultrasonic vibration

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Journal of Mountain Science 2021年第12期18卷 3366-3379页

作者： ZHANG Cheng ZHAO Da-jun ZHANG Shu-lei ZHOU Yu College of Construction Engineering Jilin UniversityChangchun 130026China Key Laboratory of Rock Mechanics and Geohazards of Zhejiang Province Shaoxing UniversityShaoxing 312000China Yellow River Survey Planning and Design Institute Co.Ltd.Zhengzhou 450003China

ultrasonic vibration technology has great potential to weaken hard *** the effect of ultrasonic vibration loading parameters is essential to accelerate the application of this technology in practical rock *** the present work,three-factor mixed-level orthogonal ultrasonic vibration rock breaking tests were conducted to investigate the influence of the main loading parameters,including confining pressure,vibration frequency,and static force,on the damage of granite *** individual and combined influences were analyzed according to the porosity increase and P-wave decrease of granite specimens using the variance analysis *** results show that the combined effect of the static force and vibration frequency mainly promotes fatigue damage of specimens,that the confining pressure determines the damage behaviour and failure mode of specimens under ultrasonic vibration,and that the confining pressure and vibration frequency are the main factors that cause the fracture concentration in the upper part of specimens,an effect mechanistically driven by the obvious load energy *** research results provide theoretical guidance for the application of ultrasonic vibration technology.

关键词： ultrasonic vibration Granite Damage evolution Confining pressure vibration frequency Static force Combined effect

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Microstructure Evolution of AS41 Magnesium Alloy Fabricated by ultrasonic vibration

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Journal of Wuhan University of Technology(Materials Science) 2010年第5期25卷 820-823页

作者：张志强 The Key Laboratory of Electromagnetic Processing of Materials Ministry of Education Northeastern University

The effects of ultrasonic vibration on the grain size and morphology of Mg2Si in Mg-4 wt% Al-1 wt%Si（AS41） alloys designed were evaluated. The results show that the major constituents of the alloy include β-Mg17Al12 and Mg2Si phase, and no difference in the type of constituents between without ultrasonic vibration and with ultrasonic vibration. Without any ultrasonic vibration, the grain size and Mg2Si phase in AS41 alloy are coare structure. However, the microstructure with fine uniform grains and Mg2Si particles are achieved with ultrasonic vibration. The crystal grains and Mg2Si particles refine with increase in the ultrasonic vibration intensity. When the ultrasonic vibration intensity was too low or too high, coarse structures could be obtained. The analysis of refinement mechanism indicates that the acoustic cavitation and flows induced by ultrasonic vibration lead to the fine uniform microstructure.

关键词： magnesium alloy ultrasonic vibration microstructure

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ultrasonic-vibration-Assisted Pelleting of Switchgrass:Effects of ultrasonic vibration

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Transactions of Tianjin University 2011年第5期17卷 313-319页

作者：丛威龙裴志坚张鹏飞秦娜 DEINES T W 林彬 Department of Industrial and Manufacturing Systems Engineering Kansas State University Manhattan KS 66506 USA Key Laboratory of Advanced Ceramics and Machining Technology of Ministry of Education Tianjin University Tianjin 300072 China

Biofuels produced from cellulosic biomass can be used to replace petroleum-based transportation fuels. However, the manufacturing cost of cellulosic biofuels is still high, partly due to the low density of cellulosic feed-stocks. Pelleting of cellulosic feedstocks can increase their density, making their transportation and storage as well as biofuel conversion more efficient and, therefore, reducing the overall cost of biofuel manufacturing. It has been shown that ultrasonic-vibration-assisted (UV-A) pelleting, without using high-temperature steam and binder materials, can produce pellets with density comparable to that produced by conventional pelleting methods. Furthermore, the sugar yield of biomass (wheat straw) processed with UV-A pelleting is 20% higher than that of biomass pelleted without ultrasonic vibration. This paper reports an experimental investigation of UV-A pelleting of switchgrass. The influences of ultrasonic vibration on pellet density, stability, durability, and pelleting force are discussed. It is concluded that pellets processed with ultrasonic vibration had higher density and stability than those processed without ultrasonic vibration, they were more durable than those processed without ultrasonic vibration, and pelleting force with ultrasonic vibration was lower than that without ultrasonic vibration.

关键词： biofuel cellulosic biomass pelleting switchgrass ultrasonic vibration

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