| A | B |
|---|
| worm hold | cylindrical porosity |
| defect | unable to meet minimum standard |
| incomplete fusion | – lack of coalescence between molten filler and base metal |
| hardness | resistance of metal to penetration – resistance and strength |
| tolerance | difference between acceptable and perfection |
| discontinuity | interruption of typical structure of a weld |
| overlap | weld metal that flows over a surface without fusing |
| inclusions | can be expected if prior welds were improperly cleaned |
| destructive | destroys the work |
| non destructive | tests without tearing up the work |
| longitudinal cracking | parallel to axis of weld |
| 4 factors affect selection of radiographic equipment | thickness, absorption, time, location of weld |
| fatigue testing | applying repeated changes in stress to the weld |
| ultrasonic equipment | pulse, resonance |
| all discontinuities | are NOT defects |
| visual inspect | most frequent non destructive |
| magnetic particle | only on magnetic materials |
| penetrant | locate very small cracks or porosity |
| toughness | Charpy test |
| ductility | in tensile test % of elongation |
| hardness increases | brittleness increases |
| guided bend test | grinding marks longitudinal to specimen |
