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| 1 | Process optimization diagram based on FEM simulation for extrusion of AZ31 profile显示文摘The ram speed and the billet temperature are the primary process variables that determine the quality of the extruded magnesium profile and the productivity of the extrusion operation.The optimization of the extrusion process concerns the interplay between these two variables in relation to the extrudate temperature and the peak extrusion pressure.The 3D computer simulations were performed to determine the effects of the ram speed and the billet temperature on the extrudate temperature and the peak extrusion pressure,thereby providing guidelines for the process optimization and minimizing the number of trial extrusion runs needed for the process optimization.A case study on the extrusion of an AZ31 X-shaped profile was conducted.The correlations between the process variables and the response from the deformed material,extrudate temperature and peak extrusion pressure,were established from the 3D FEM simulations and verified by the experiment.The research opens up a way to rational selection of the process variables for ensured quality and maximum productivity of the magnesium extrusion. | 刘钢 周捷 J DUSZCZYK | 2008 | 中国有色金属学会会刊:英文版2008，18，A01： | 4 |
| 2 | Forming of magnesium alloy microtubes in the fabrication of biodegradable stents显示文摘Magnesium alloys have, in recent years, been recognized as highly promising biodegradable materials, especially for vascular stent applications. Forming of magnesium alloys into high-precision thin-wall tubes has however presented a technological barrier in the fabrication of vascular stents, because of the poor workability of magnesium at room temperature. In the present study, the forming processes, i.e., hot indirect extrusion and multi-pass cold drawing were used to fabricate seamless microtubes of a magnesium alloy. The magnesium alloy ZM21 was selected as a representative biomaterial for biodegradable stent applications. Microtubes with an outside diameter of 2.9 mm and a wall thickness of 0.2 mm were successfully produced at the fourth pass of cold drawing without inter-pass annealing. Dimensional evaluation showed that multipass cold drawing was effective in correcting dimensional non-uniformity arising from hot indirect extrusion. Examinations of the microstructures of microtubes revealed the generation of a large number of twins as a result of accumulated work hardening at the third and fourth passes of cold drawing, corresponding to the significantly raised forming forces. The work demonstrated the viability of the forming process route selected for the fabrication of biodegradable magnesium alloy microtubes. | Lixiao Wang Gang Fang Lingyun Qian Sander Leeflang Jurek Duszczyk Jie Zhou | 2014 | Progress in Natural Science:Materials International2014，24，5： | 2 |
| 3 | An electron microscopical study on the growth of TiO 2 –Ag antibacterial coatings on Ti6Al7Nb biomedical alloy显示文摘 | B.S. Necula I. Apachitei F.D. Tichelaar L.E. Fratila-Apachitei J. Duszczyk | 2011 | Acta Biomaterialia2011，，6： | 2 |
| 4 | Enrichment of anodic MgO layers with Ag nanoparticles for biomedical applications显示文摘 | B. S. Necula L. E. Fratila-Apachitei A. Berkani I. Apachitei J. Duszczyk | 2009 | Journal of Materials Science: Materials in Medicine2009，，1： | 2 |
| 5 | A transmission electron microscopy study of hard anodic oxide layers on AlSi(Cu) alloys 显示文摘 | FRATILA-APACHINTEI L E TICHELAAR F D THOMPSON G E TERRYN H SKELDON P DUSZCZYK J | 2004 | Electrochimica Acta2004，49，19： | 1 |
| 6 | A 3D FEM simulationstudy on the isothermal extrusion of a 7075 aluminiumbillet with a predetermined non-linear temperaturedistribution显示文摘 | LI L ZHOU J DUSZCZYK J | 2003 | Modelling and Simulation in MaterialsScience and Engineering2003，11，3： | 1 |
| 7 | Porous NiTi surfaces for biomedical applications显示文摘 | Z. Huan L.E. Fratila-Apachitei I. Apachitei J. Duszczyk | 2012 | Applied Surface Science2012，，13： | 1 |
| 8 | Electroless Ni-P composite coatings: The effect of heat treatment on the microhardness of substrate and coating 显示文摘 | APACHITEI I DUSZCZYK J KATGERMAN I | 1998 | Scr Material1998，38，9： | 1 |
| 9 | Computer simulated andexperimentally verified isothermal extrusion of 7075 Alaluminium through continuous ram speed variation显示文摘 | ZHOU J LI L DUSZCZYK J | 2004 | Journal of Materials Processing Technology2004，146，2： | 1 |
| 10 | Autocatalytic nickel coatings on aluminium with improved abrasive wear resistance显示文摘 | Apachitei I Duszczyk J | 2000 | Surface and Coatings Technology2000，132，1： | 1 |
| 11 | Prediction of temperature evolution during the extrusion of 7075 aluminium alloy at various ram speedsby means of 3D FEM simulation 显示文摘 | Li L Zhou J Duszczyk J | 2004 | Journal of Materials Pro- cessing Technology2004，145，： | 1 |
| 12 | 显示文摘 | Zhou J Duszczyk J Korevaar B M | 1991 | J Mater Sci1991，26，： | 1 |
| 13 | Determination of a constitutive relationship for AZ31B magnesium and validation through comparison between simulated and real extrusion显示文摘 | Li L Zhou J Duszczyk J | 2006 | Journal of Materials Processing Technology2006，172，3： | 1 |
| 14 | Prediction of temperaturedevelopment during the extrusion of 7075 aluminiumalloy at various ram speeds by means of 3D FEMsimulation显示文摘 | LI L ZHOU J DUSZCZYK J | 2004 | Journal of Materials Processing Technology2004，145，3： | 1 |
| 15 | F E analysis of metal flow and weld seam formation in a porthole die during the extrusion of a magnesium alloy into a square tube and the effect of ram speed on weld strength 显示文摘 | Liu G Zhou J Duszczyk J | 2008 | Journal of materials processing technology2008，200，2： | 1 |
| 16 | Electroless Ni-P composite coatings显示文摘 | APACHITEI I KATGERMAN L DUSZCZYK J | 1998 | Scripta Mater1998，38，9： | 1 |
| 17 | 3D FEM simulation of the whole cycle of aluminum extrusion throughout the transient state and the steady state using the updated Lagrangian approach显示文摘 | ZHOU J LI L DUSZCZYK J | 2003 | J Materials Processing Technology2003，134，： | 1 |
| 18 | 3D FEM simulation of thewhole cycle of aluminum extrusion throughout thetransient state and the steady state using the updatedlargranian approach显示文摘 | ZHOU J LI L DUSZCZYK J | 2003 | Journal of Materials ProcessingTechnology2003，134，3： | 1 |
| 19 | FEM analysis of aluminum extrusion through square and round dies显示文摘 | CHANDA T ZHOU J DUSZCZYK J | 2000 | Materials and Design2000，21，32： | 1 |
| 20 | Constitutive analysis of wrought magnesium alloy Mg-A14-Znl 显示文摘 | SLOFF F A ZHOU J DUSZCZYK J KATGERMAN L | 2007 | Scripta Materialia2007，57，8： | 1 |
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