Publications
143 results found
Wang L, Zhou J, Duszczyk J, et al., 2012, Friction in aluminium extrusion-Part 1: A review of friction testing techniques for aluminium extrusion, TRIBOLOGY INTERNATIONAL, Vol: 56, Pages: 89-98, ISSN: 0301-679X
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- Citations: 35
Li F, He ZB, Wang L, et al., 2012, Process analysis in mandrel extrusion of special-shaped aluminum alloys profile, Kovove Materialy, Vol: 50, Pages: 269-275, ISSN: 0023-432X
In order to reveal abnormal shaped aluminum alloy law of needle piercing extrusion formation, setting the missile empennage as an example, this paper adopts the non-linear finite element to conduct the three-dimensional thermal simulation of abnormal shaped material law of needle piercing extrusion formation process and analyses systematically the influence of process law on temperature change, additional tensile stress and forming load. The results show that, in the range of low-speed extrusion, the billet's highest peak temperature shows a decreasing trend, and with the extrusion speed increasing, the decrease of highest peak temperature decreases, while the axial extra tensile stress on the mouth of model increases accordingly; the axis part of the mold's mouth is a high-temperature zone in the forming process, and with the axis center distance increasing, the temperature decreases gradually; and with the pressing reduction's increase, the gradient of temperature decreasing trend slows down gradually. This provides a theoretical basis to technical design of abnormal shaped material needle piercing extrusion formation and the metal distortion flow control.
Wang L, Zhou J, Duszczyk J, et al., 2012, Identification of a friction model for the bearing channel of hot aluminium extrusion dies by using ball-on-disc tests, TRIBOLOGY INTERNATIONAL, Vol: 50, Pages: 66-75, ISSN: 0301-679X
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- Citations: 15
Li F, Li JH, Li C, et al., 2012, Research on the Deformation Mechanism and Failure Behavior of Punch Bonding Technology with Dissimilar Sheet Metals, JOM, Vol: 64, Pages: 600-606, ISSN: 1047-4838
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- Citations: 2
Li F, He ZB, Wang L, et al., 2012, Process analysis in mandrel extrusion of special-shaped aluminum alloys profile, KOVOVE MATERIALY-METALLIC MATERIALS, Vol: 50, Pages: 269-275, ISSN: 0023-432X
Li F, Lin JF, Wang LL, et al., 2011, The Isothermal Forming Process of V-shaped Aluminum Alloy Joint Forgings, JOM, Vol: 63, Pages: 62-65, ISSN: 1047-4838
Wang L, 2011, Method of forming a component of complex shape from sheet material
Method of forming a component of complex shape from an Al -alloy sheet or a Mg- alloy sheet. The method comprises the steps of: a) heating the sheet to a temperature below the solution heat treatment (SHT) temperature for the alloy; b) forming the heated sheet between heated dies into or towards the complex shape; c) heating the sheet to at least its SHT temperature and substantially maintaining that temperature until SHT has been completed; and d) quenching the solution heat treated sheet between cold dies and at the same time completing the forming into the complex shape or maintaining that shape.
Wang L, Strangwood M, Balint D, et al., 2011, Formability and failure mechanisms of AA2024 under hot forming conditions, MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING, Vol: 528, Pages: 2648-2656, ISSN: 0921-5093
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- Citations: 123
LIN J, BALINT D, WANG L, et al., 2011, Method for forming component of complex shape from aluminum-alloy sheet, involves quenching heated sheets between cold dies in solution and maintaining shape of sheet, GB2473298-A ; WO2011058332-A1 Full Text ; CA2720808-A1 ; GB2473298-B ; MX2012005581-A1 ; AU2010317713-A1 ; KR2012093336-A ; IN201003116-I3 ; EP2499271-A1 Full Text ; CN102712985-A ; JP2013510723-W ; US2013125606-A1
NOVELTY - The method involves heating aluminum-alloy sheet to a temperature below solution heat treatment (SHT) temperature for the alloy. The heated sheet between hot dies is formed into a complex shape. The sheet is heated to the SHT temperature and the temperature is maintained until the SHT is completed. The heated sheet between cold dies is quenched in a solution and the complex shape is maintained.USE - Method for forming component of complex shape from aluminum-alloy sheet.ADVANTAGE - Since the heated sheets between cold dies are quenched in solution, complex shape can be formed and cooled easily, and the wastage of alloy is reduced.
Mohamed MS, Lin J, Wang L, et al., 2010, Hybrid forming processes for production of lightweight high strength automotive panel parts, International Heat Treatment and Surface Engineering, Vol: 4, Pages: 160-165, ISSN: 1749-5148
The research concentrates on a heat treatable AA 6082 aluminium alloy. A set of unified constitutive equations has been developed and determined from experimental data. In addition to modelling viscoplastic flow of the material at different temperatures, the equations contain other two specific features. One is to predict the failure of the material under various deformation conditions based on continuum damage mechanics theories. The other is to model the precipitation formation and growth under straining and aging conditions; thus, the strength distribution of formed parts can be predicted via process modelling. The determined unified constitutive equations are then implemented into the commercial finite element code ABAQUS/Explicit via the user defined subroutine, VUMAT. A finite element process simulation model and numerical procedures are established for the modelling of a hot stamping and cold die quenching processes for a spherical part with a central hole. To validate the simulation results, a test programme is developed, a test rig has been designed and manufactured and tests have been carried out under different forming rates. It has been found that very close agreements between experimental and numerical process simulation results are obtained for the range of forming rates carried out. © 2010 Maney Publishing.
Wang L, He Y, Zhang Y, et al., 2010, Modeling of double action extrusion-A novel extrusion process for friction characterization at the billet-die bearing interface, TRIBOLOGY INTERNATIONAL, Vol: 43, Pages: 2084-2091, ISSN: 0301-679X
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- Citations: 9
Mohamed M, Foster A, Wang L, et al., 2010, Formability for Hot Stamping of Al-Alloy Panel Parts, STEEL RESEARCH INTERNATIONAL, Vol: 81, Pages: 659-662, ISSN: 1611-3683
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- Citations: 1
Wang L, He Y, Zhou J, et al., 2010, Effect of temperature on the frictional behaviour of an aluminium alloy sliding against steel during ball-on-disc tests, TRIBOLOGY INTERNATIONAL, Vol: 43, Pages: 299-306, ISSN: 0301-679X
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- Citations: 42
Wang L, Zhou J, Duszczyk J, 2010, Friction in double action extrusion, International Conference on Extrusion and Benchmark, Publisher: TRANS TECH PUBLICATIONS LTD, Pages: 153-160, ISSN: 1013-9826
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- Citations: 5
Li F, Wang LL, Yuan SJ, et al., 2009, Evaluation of Plastic Deformation During Metal Forming by Using Lode Parameter, JOURNAL OF MATERIALS ENGINEERING AND PERFORMANCE, Vol: 18, Pages: 1151-1156, ISSN: 1059-9495
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- Citations: 6
Wang L, Cai J, Zhou J, et al., 2009, Characteristics of the Friction Between Aluminium and Steel at Elevated Temperatures During Ball-on-Disc Tests, TRIBOLOGY LETTERS, Vol: 36, Pages: 183-190, ISSN: 1023-8883
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- Citations: 21
Wang L, He Y, Zhou J, et al., 2009, Modelling of plowing and shear friction coefficients during high-temperature ball-on-disc tests, TRIBOLOGY INTERNATIONAL, Vol: 42, Pages: 15-22, ISSN: 0301-679X
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- Citations: 18
Liu X, Hou K, Wang L, et al., 2009, Index and Recognition for the Shape Contour of Plant Leaves, 1st WRI Global Congress on Intelligent Systems (GCIS 2009), Publisher: IEEE COMPUTER SOC, Pages: 436-+
Kruse SW, Suino-Powell K, Zhou XE, et al., 2008, Identification of COUP-TFII orphan nuclear receptor as a retinoic acid-activated receptor, PLOS BIOLOGY, Vol: 6, Pages: 2002-2015, ISSN: 1544-9173
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- Citations: 150
Wang H, Huang Y, Sun Q, et al., 2007, Depth dependence of structural quality in InN grown by metalorganic chemical vapor deposition, MATERIALS LETTERS, Vol: 61, Pages: 516-519, ISSN: 0167-577X
Yuan SJ J Z, Z B H, Wang L, et al., 2006, Method for measuring flow and strain in metal deformed body by thread
Disclosed is a method for measuring the flow and strain inside of the metal deforming body with screw thread. The method comprises steps of: 1. processing the original material; 2. processing screw holes on the original material; 3. forming the material after processed with step 2; cutting along the axle center of the screw; 5. obtaining the x, y coordinate of the screw thread; 6. processing the data got from step 5 and drawing the deformed screw thread and calculating the strain value of each point on the screw thread according to change of screw-pitch.
Liu G, Wang L-L, Yuan S-J, et al., 2006, Compressive formability of 7075 aluminum alloy rings under hydrostatic pressure, TRANSACTIONS OF NONFERROUS METALS SOCIETY OF CHINA, Vol: 16, Pages: 1103-1109, ISSN: 1003-6326
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- Citations: 9
Liu G, Liu Z, Wang L, et al., 2006, Experimental research on compressing 7075 Al alloy ring under hydrostatic pressure, Harbin Gongye Daxue Xuebao/Journal of Harbin Institute of Technology
Through axial compression experiments of rings with variant shape factors and different hydrostatic pressures, the effect of hydrostatic pressure on the compression limit of an aluminum alloy 7050 ring was obtained. With observation of meridional sections of deformed samples, the deformation and fracture feature when the compression limit is exceeded under different hydrostatic pressures is analyzed. The experimental results show that the compression limit of an Al alloy ring increases as the hydrostatic pressure increases, and the increase displays linearity in a certain pressure range. The research verified that the formability of the aluminum alloy 7075 ring in the compression process was remarkably improved by employing hydrostatic pressure.
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