Dissertation > Excellent graduate degree dissertation topics show

The Influence of Oxide Film on Cross Welding Joint of 2219 Aluminum by FSW and VPPA

Author: KongXiangFeng
Tutor: LinTao
School: Shanghai Jiaotong University
Course: Materials Processing Engineering
Keywords: 2219 aluminum alloy Friction Stir Welding Variable polarity plasma arc welding Cross- weld Oxide film
CLC: TG453.9
Type: Master's thesis
Year: 2011
Downloads: 107
Quote: 0
Read: Download Dissertation

Abstract


Stir friction welding with variable polarity plasma arc welding 2219 aluminum alloy welding process of two commonly used methods . The tank of the production in the aerospace , two welding process combine to form a cross - weld seam . However , there are few studies of domestic stir friction welding with variable polarity plasma welding cross weld . Often substandard quality welding repair welding . Stir friction welding with variable polarity plasma welding coupling in order to improve and promote solid phase connection with a combination of liquid phase bonding process , this article will be space launch vehicle production background -depth study of the state of the surface oxide film of 2219-T6 aluminum alloy cross- weld properties . Packet controlled trials are designed , detailed analysis of the oxide film on the weld appearance of formability , microstructure , mechanical properties , and weld defects . The study found that the higher the content of the surface oxide film , the appearance of the cross - weld molding worse ; the same time the presence of an oxide film will affect the crystalline form , and the grain growth of the cross - weld way , the higher the content thereof , the more uneven weld microstructure , the typical weld cast structure is not obvious, the lower the performance . By the weld morphology the SEM comparison , the weld organizations overheating even overfiring . Completely remove the cross connector, mechanical properties of the surface oxide film is low, having directionality . The cross connector microhardness presented \The tensile fracture analysis available of the oxide film on the mechanical properties of the weld is increase in the second phase particle content caused due to the presence of the oxide film so that the weld stomatal increased . The study also found that the the cross weld defects hydrogen hole main chain distribution along the fusion line was . Binding assay proved stirred before the friction welding aluminum content of the oxide film on the surface of the higher the weld in stomatal more , a more serious impact on the cross joint pores .

Related Dissertations

  1. Technology of Filling Clearance and Optimizing the Bonds during Ultrasonic Brazing,TG454
  2. 6082-T6 aluminum alloy microstructure and mechanical properties of friction stir welding head,TG453.9
  3. Microstructure and Property of Friction Stir Welding Jiont for High Strength Aluminumalloy Under Controlled Cooling Condition,TG407
  4. Influence of Welding Conditions on Temperature Distributions and Quality of Friction Stir Welding Butt Joints,TG453.9
  5. Process and mechanism of high strength aluminum alloy composite welding with ultrasonic agitation,TG453.9
  6. Preparation and Characterization of Three-Dimensionally Ordered Macroporous Cu2O Films,TB383.2
  7. Study on the Vibration Assisted Semi Solid Brazing of SiC_p/ZL101A Composites,TG454
  8. Whole Design for the Welder of the Double-Helical Friction Stir Welding Based on Open CNC System,TG439.8
  9. Structural and Electrical Transport Properties Research of Sn: In2O3 and Nb: TiO2 Transparent Conducting Thin Films,TB383.2
  10. Study on Preparation and Properties of Silver Oxide Thin Film,O484.1
  11. The Semiconductor and Electrochemistry Study of Zinc Injection Technique Inhibition Metal Corrosion in Primary Water of Pressurized Water Reactor,TL375.6
  12. Microstructure and Mechanical Properties of Dissimilar Metal Lap Joints of Al/Mg by Friction Stir Welding,TG453.9
  13. Study on the Green Sealing Methods for Alumnium Alloy Anodic Oxide Film,TG174.451
  14. Composite Grid Method(CGM) and It’s Application in Numerical Simulation of Welding,O241.82
  15. Friction stir welding of thick mixing head shape of the welding performance impact,TG453.9
  16. Research on Orthogonal Cross Joints of 2219 Aluminum Alloy by FSW-VPPA Welding,TG441.7
  17. Research on the Technology and Structure Property of 5A05 Al Alloy Friction Stir Welding,TG453.9
  18. Structure and Performance of Fsw Joint of AZ31 and 5083 Alloy,TG453.9
  19. Study on Microstructure and Properties of Weld Joint of AZ31B Magnesium Alloys by FSW/TIG,TG453.9
  20. Resarch on Weldability of 2519A Aluminum-copper Alloy,TG457.1
  21. Study on Friction Stir Repair Welding and Friction Spot Joining of 2A70 Aluminum Alloy,TG453.9

CLC: > Industrial Technology > Metallurgy and Metal Craft > Welding, metal cutting and metal bonding > Welding process > Pressure welding > Other pressure welding
© 2012 www.DissertationTopic.Net  Mobile