Accession Number : AD0648486

Title :   TORQUE TEST FOR EVALUATING THE QUALITY OF ALUMINUM ALLOY MELTS,

Corporate Author : FRANKFORD ARSENAL PHILADELPHIA PA PITMAN-DUNN RESEARCH LABS

Personal Author(s) : Sulinski,Harry V. ; Lipson,Samuel

Report Date : DEC 1966

Pagination or Media Count : 40

Abstract : A preliminary development of a cast torque specimen has been made for evaluating the quality of an aluminum alloy. The approach was to design the specimen, develop a testing procedure, and correlate the test results with those obtained with companion, separately cast-to-size, tensile bar specimens. The developed torque specimen was cast to size using a resin-bonded shell mold, and tested using an indicating torque wrench. It was found that the torque data reproducibility is equivalent to the reproducibility observed for separately cast tensile bars. In general, heat-treated (T6) torque and tensile specimens reflect artificially produced variations in the gas and magnesium contents of A356 alloy. As-cast specimens of A356 alloy are relatively insensitive to these variations in melt quality. It was recommended that further work be conducted to: (1) monitor heat treatment of aluminum castings; (2) improve the sensitivity of the test to permit melt quality evaluation on the basis of as-cast test specimens.

Descriptors :   (*ALUMINUM ALLOYS, QUALITY CONTROL), (*TORQUE, TEST EQUIPMENT), MELTING, CASTING, MOLDINGS, TENSILE PROPERTIES, MATERIAL FORMING, HEAT TREATMENT, SPECIFICATIONS

Subject Categories : Metallurgy and Metallography
      Fabrication Metallurgy

Distribution Statement : APPROVED FOR PUBLIC RELEASE