WELD TESTING. DESTRUCTIVE AND NON-DESTRUCTIVE. DESTRUCTIVE TESTING . These can be divided into two parts, Tests capable of being performed in the workshop. Laboratory tests. microscopic-macroscopic , chemical and corrosive. REASONS.
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Material is sectioned and edges rounded of to prevent cracking.
Punch marks are made to see elongation.
Physical condition of the weld
Determine welds efficiency
Striking with a rounded object
Ringing tone if no defect
Tone changes when object is cracked
Electro magnetic radiation of short duration
Both of these methods are a danger to health
Pictures taken are viewed as negatives
will only give flat image not in three dimensional
darkened area must be used for viewing