October 2006
Weld-related cracking is one of the frequently-encountered quality defects in the welding process. In the final part of a series on the different types of cracking associated with welding, the authors consider the implications of liquation cracks in the heat affected zone, reheat cracking and lamellar tearing.
Front cover and story sponsored by Afrox.
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FEATURES
Welding personality
New Southern African Institute of Welding (SAIW) president Professor Andy Koursaris talks to African Fusion about his vision for the SAIW and the welding industry as a whole
WELDING AND RELATED INSPECTION TECHNOLOGIES
Metallurgical failure investigation
This paper by Roelien Vorster - recipient of the SAIW's prestigious 2005 Harvey Shacklock Gold Medal award - describes the metallurgical failure investigation undertaken to determine the cause of a leakage at the Auto Thermal Reformer (ATR) plant at Sasol One, which resulted in millions of rand in downtime production loss
Electron beam welding
This paper by Dietrich von Dobeneck looks at the variety of applications for electron beam welding, developed from 30 years of job-shop experience. He believes that one cannot use yesterday's tools and still be in business tomorrow
Welding engineering
Dr Tony Paterson, aluminium specialist at the Aluminium Federation of Southern Africa (AFSA) talks about the role of the welding engineer in commercial transport design and fabrication
Global welding manufacturing
With the local welding industry facing major challenges and shortages of skilled welders, keeping up to speed with advanced technologies may be the only way forward. African Fusion talks to the regional manager of Lincoln Electric, South Africa, Bruce Chantry, on taking welding into the 21st century
Laser seam-tracking
Motoman's state-of-the-art laser seam-tracking is guaranteed to improve welding quality. Technology leader, welding for Motoman Inc, Chris Ackerman, looks at touch-sensing, seam-finding and seam-tracking technologies which have been developed to help welding robots locate the welding seam and accommodate variations in joint gap and part fit-up
