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Title of Journal: Weld World

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Abbravation: Welding in the World

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Springer Berlin Heidelberg

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DOI

10.1007/s00247-008-1039-y

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1878-6669

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Henry Granjon Prize Competition 2010 Winner Catego

Authors: Ryoji Ohashi
Publish Date: 2011/09/01
Volume: 55, Issue: 9-10, Pages: 2-11
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Abstract

Friction stir spot welding FSSW was applied to interstitial free IF steel sheet and dualphase highstrength steels for automobiles with an uncoated Si3N4 tool The tool with TiNcoating and Ar shielding gas were also attempted Defectfree joints were successfully obtained Microstructure distribution of the joint and its evolution during FSSW were systematically examined as well as joint strength The joint exhibited the heterogeneous microstructure distribution which could be mainly explained by phase transformation from the different peak temperatures during FSSW However contaminations of oxygen silicon and nitrogen were detected in an elliptical region observed near the pin hole and strongly affected the microstructural evolution Additionally they caused the increase in hardness in the elliptical zone On the other hand by using coated tool and shielding gas contaminations and hardness increase in elliptical region were suppressed and joint strength was improved

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Other Papers In This Journal:
  1. Effects of Surface Treatments of Galvanized Steels on Process Properties of Projection Welding
  2. Development of SnAgCu solders with Bi and In additions and microstructural characterization of joint interface
  3. Spatter And Fume Reduction In Co 2 Gas- Shielded Arc Welding By Regulated Globular Transfer
  4. Impact of the Qualification of Personnel in the Manufacturing Industry
  5. Welder-optimized CJP-equivalency welds for tubular connections
  6. In situ strain evaluation during TIG welding determined by backside digital image correlation
  7. Economic Orthogonally Welded Stiffening of an Uniaxially Compressed Steel Plate
  8. Henry Granjon Prize Competition 2006 Winner, Category B “Materials behaviour and weldability” The Influence of Molybdenum on the Microstructure of Stainless Steel Welds
  9. Metallurgical characterization of the 5083H116 aluminum alloy welded with the cold metal transfer process and two different wire-electrodes (5183 and 5087)
  10. The Influence of Ultrasonic Impact Treatment on Fatigue Behaviour of Welded Joints in High-Strength Steel
  11. Mechanical-Technological and Fracture Mechanical Properties of the high Grade Pipeline-Steel X80 with Results of Different Pipeline-Projects
  12. Development and Application of the 3-Electrode MAG High-Speed Horizontal Fillet Welding Process
  13. Feasibility study of laser welding assisted by filler wire for narrow-gap butt-jointed plates of high-strength steel
  14. Laser brazing of TiAl intermetallic compound using precious brazing filler metals
  15. An Investigation of Failure Types in High-Strength Steel Resistance Spot Welds
  16. Elastic Plastic Fe Analyses of Sub Models of Connections in Steel Framed Moment Resisting Buildings Under Earthquake Loading
  17. Development of a Welding Monitoring System for In-Process Quality Control of Thick Walled Pipe
  18. A new approach for MIG/MAG cladding with Inconel 625
  19. Four Decades of Electron Beam Development at TWI
  20. Three-dimensional finite element simulation of welding residual stress in RPV with two J-groove welds
  21. Investigation of Watergas Welded Joints for Future Decisions Concerning Old Hydropower Stations
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