Senior research metallurgistPersonal member, Armco Steel Corp.ASTM, Middletown, Ohio
Manager-Supporting LaboratoriesPersonal member, Armco Steel Corp.ASTM, Middletown, Ohio
Pages: 17 Published: Jan 1970
Variables studied in this evaluation of the Battelle type drop-weight tear test (DWTT) include operator, test machine, specimen thickness, notch type, and strength level of the material tested. Operator and machine variations were found to be small. For a given material, increasing the specimen thickness raises the plateau energy and the transition temperature. Energy at a given percent shear is proportional to thickness. Notches examined include pressed notch, machined notch, fatigue crack, and crack starter weld. Continued use of the pressed notch is recommended. A side grooved DWTT specimen is used to compare the toughness of heat affected zones of welded specimens to that of the base metal. Work in this area is continuing.
drop-weight tests, tear tests, fractures (materials), transition temperature, fracture (materials), toughness, fracture appearance, impact tests, welds, pendulums, test equipment, evaluation, tests
Paper ID: STP32064S