Dissertation > Excellent graduate degree dissertation topics show

Research on Microstructure and Properties of Friction Stir Welded Joint of 6082-T6 Aluminum Alloy

Author: SunHongMei
Tutor: XuXiangYang;DongChunLin
School: Beijing Jiaotong University
Course: Materials Processing Engineering
Keywords: 6082-T6 aluminum alloy Friction Stir Welding Organization Performance Fracture
CLC: TG407
Type: Master's thesis
Year: 2009
Downloads: 374
Quote: 1
Read: Download Dissertation

Abstract


Lightweight is the key to improving the overall performance of high-speed trains , lightweight aluminum alloy body . Aluminum alloy body fusion welding and manufacturing, and surviving a serious softening in the welded joints , fatigue and the impact of poor performance , large welding deformation . Friction stir welding is a new type of solid-phase welding technology , performance of welded joints , stress and deformation is small and abroad has its manufacturing , domestic hull for high-speed train body still blank . In this paper, for the application of high - speed train body background , a study of 6082-T6 aluminum alloy friction stir welding head of the organization and performance , from the structure, hardness, tensile properties and fatigue performance compared friction stir welding and TIG differences , to discuss the the FSW joint tissue formation mechanism , tensile fracture and fatigue fracture morphology analysis , clear the fracture mechanism . The study results show that : the weld nugget zone of FSW joints due to dynamic recrystallization small equiaxed grains , fine grain joints than MIG weld , the weld heat affected zone is narrower . FSW joints hardness higher than MIG welding , that FSW joints softening the degree mitigate . FSW joint tensile properties superior to the MIG welding head , wherein the tensile strength is increased 5%, the elongation is increased by 50% . The FSW joint tensile fracture dimples than MIG welding head size than MIG welding head is large and deep . FSW joint fatigue performance was significantly higher than the MIG welding, the number of fatigue cycles to 2 × 10 6 , FSW 84.5MPa fatigue strength is 24.4% higher than MIG . FSW and MIG welding on the fatigue fracture characteristics of fatigue bands , but the FSW fatigue stripe spacing smaller than MIG .

Related Dissertations

  1. Empirical Study on the Top Management Turnover and Performance of Listed Companies in China,F224
  2. Powered Activited Carbon-UF for Treating Micro-polluted Surface Water,X703
  3. The Brake Performance of Hydraulic Retarder and Simualtion Research on Its Application for Aircraft Arrestment,TH137.331
  4. Numerical Study of the Effect with Straight and Bowed Stator in Different Axial Gaps,TH45
  5. Effectiveness Evaluation on the Jointed Combat of the Multiple Missiles and Research on Combinatorial Optimization Algorithm,TJ760.1
  6. The Research of Steel’s Representation in Architecture,TU-0
  7. Partical Combination of Fine Powder Effect on Performance of Cement and Concrete,TU528.041
  8. Experimental Research on the Influence of Hollow Cathode to a Hall Thruster,V439.2
  9. Preparation and Properties of Silicon Carbon Anode for Lithium Ion Battery,TM912.9
  10. Hardware Implementation of LEO Satellite Channel Characteristic Emulation,TN927.23
  11. Development of Pxibus High Performance Digital I/O Module,TP274
  12. A Study on Several Management Questions of BEIEC’s Restructuring,F426.92
  13. The Research on the Performance Results Application of Zhaoqing Power Supply Bureau,F272.92
  14. The Preparation and Properties of Reed Woodceramic,TQ174.1
  15. Clinical Study of the Extremely Low-frequency Pulsed Electromagnetic Fields on Accelerating Fracture Healing,R683
  16. Construction of new suburban rural grassroots party organizations,D267.2
  17. The Study on Characteristics and Governance of Crimes Related to Gangs,D917
  18. Improve the Junior High School Students Interested in Learning Chemistry Research,G633.8
  19. Synthesis and Resolution Property of N-(9-Fluorenylmethoxycarbonyl)-D-Tryptophan and D-Phenylalanine Imprinted Polymer,O631.3
  20. Experimental study of roadway flexible material the wind resistance of the air curtain group,TD724
  21. The Study on Rhinoceros Horn and Its Imitation,TS932.2

CLC: > Industrial Technology > Metallurgy and Metal Craft > Welding, metal cutting and metal bonding > Welding general issues > Mechanical properties of welded joints and Intensity
© 2012 www.DissertationTopic.Net  Mobile