Dissertation > Excellent graduate degree dissertation topics show

The Forming Experiments and Constitutive Model Research of AZ31 Magnesium Alloy Strip-shaped Sheet under the HVF & Warm Forming Conditions

Author: LiZheng
Tutor: HuangShangYu
School: Wuhan University of Technology
Course: Materials Processing Engineering
Keywords: high velocity forming warm forming constitutive model Magnesium alloy electromagnetic forming
CLC: TG301
Type: Master's thesis
Year: 2009
Downloads: 107
Quote: 3
Read: Download Dissertation

Abstract


High velocity forming (HVF) is the shaping method of materials by impulse impact pressure with rapidly conveying energy to workpiece during very short durations. The material formability is largely improved compared to static forming method. And some kinds of metals and alloys are brittle at room temperature and are difficult to process Under plastic processing, so these metals can be smooth processing if they are heated to a certain temperature before the deformation. It can generate some response, significantly reduce internal stress and deformation resistance, improve the plasticity in addition to produce work-hardening. For the reason that making full use of advantages of electromagnetic forming& warm forming to improve the forming performance. So it is indispensable to study the constitutive model of the Composite Forming of HVF&Warm forming to guide metals’ transformation.The composite forming of High velocity forming&Warm forming was studied based on electromagnetic forming method. It was summarized the change of constitutive relation to be important factor effecting the material high velocity formability. The strain-rate and temperature improvement determined the constitutive change. Effect of strain-rate was obvious.The constitutive model of HVF&Warm forming was researched based on the electromagnetic with accessorial sheet method, which had uniform electromagnetic force. With analyzed the deformation phases under the HVF&Warm forming conditions. And Analysis of the impact of the Discharge voltage, discharge Capacitor and the forming temperature. The displacement, strain of workpiece and electromagnetic force was obtained.Geted the stress-strain curves of magnalium sheet under the HVF&Warm forming conditions based on the SHPB experiment and seted up the constitutive model of magnalium. The result of simulation and experment declared that the HVF &warm formiing constitutive model could express rightly on the formability of metals in HVF&warm foming. make a certain sense of leading research.

Related Dissertations

  1. Microstructure and Mechanical Properties of Mg-Zn-Y-Zr Alloys,TG146.22
  2. Rate-dependent Endochronic Damage Constitutive Model for Concrete,TU528
  3. Research on the Triple-Shear Unified Cap Model for Soil,TU411.7
  4. The Research on Extrusion Parameters Through the Plate Billet of Magnesium Alloy,TG379
  5. Study on Mechanical Characteristic of Rubber Spring Used in Vibrating Screen,O322
  6. Rolled Mg-Zn-Ce-Zr (Mn) alloy microstructure and mechanical properties of,TG339
  7. Repeated upsetting suppress Mg-Si alloys prepared microstructure and properties,TG146.22
  8. Dissimilar magnesium alloy AZ31 and NZ30K study of laser welding,TG456.7
  9. Mg-Al-Mn (-RE) die-cast magnesium alloy Low Cycle Fatigue Behavior,TG136.1
  10. Magnesium alloy cylinder casting process and simulation analysis,TG292
  11. ECAP for Mg-Zn-Zr-Gd alloy fatigue behavior of,TG379
  12. Longitudinal magnesium alloy AZ91 under AC magnetic field properties of welded joints,TG407
  13. Magnesium alloys and corrosion resistance of phosphating process,TG174.4
  14. Plastic deformation on direct smelting crude magnesium AZ91 magnesium alloy and hardness of,TG146.22
  15. Si-containing magnesium alloy microstructure and mechanical properties,TG146.22
  16. Die-cast magnesium alloy automotive steering column bracket CAE,TG249.2
  17. Vacuum casting AZ91 Magnesium Alloy Corrosion Resistance,TG146.22
  18. Mg-Sn alloy microstructure and mechanical properties,TG146.22
  19. Direct smelting crude magnesium AM50 magnesium alloy inclusions in the analysis,TF822
  20. Compression at room temperature direct smelting crude magnesium AZ91 magnesium alloy hardening and annealing transformation kinetics,TF822
  21. Rolled magnesium alloy ratcheting behavior and microstructure simulation,TG339

CLC: > Industrial Technology > Metallurgy and Metal Craft > Metal pressure processing > General issues > Theory of pressure processing
© 2012 www.DissertationTopic.Net  Mobile