Foil or thin wire at weld root is used to verify weld penetration. When weld is adequate, material mixes with weld and traces of it diffuse to weld crown. Spectroscopic analysis of samples identifies foreign material and verifies root has fused. Weld roots are usually inaccessible to visual inspection, and X-ray and ultrasonic inspection techniques are not always reliable. Good results are obtained with use of gold/nickel alloy.
"Foreign material" to verify root fusion in welded joints
NASA Tech Briefs ; 5 , 2
1980-09-01
Miscellaneous
No indication
English
Lack of fusion in welded joints
British Library Conference Proceedings | 2000
|TIBKAT | 1987
|Engineering Index Backfile | 1904
|Engineering Index Backfile | 1903
|Engineering Index Backfile | 1897