Page 217 - Welding of Aluminium and its Alloys
P. 217
Description Causes Current too low, travel speed too high, Failure of weld metal to fuse to incorrect torch angle, oxide film on prep. weld preparation surfaces, inadequate joint cleaning, weld preparation too narrow Current too low, travel speed too high, Failure of weld metal to fuse to incorrect t
Weld defects, description and causes Defect Name Lack of side wall fusion Lack of inter-run fusion Lack of root fusion Poor restart (cold start) Lack of penetration Insufficient (lack of) root penetration Excess penetration Root or face undercut Excess convexity
Table 11.1 ISO 6520 Defect no. 4011 (Fig. 11.1) 4012 (Fig. 11.1) 4013 (Fig. 11.1) 517 402 4021 (Fig. 11.2) 504 (Fig. 11.3) 501 (Fig. 11.4) 502 (butt)