Accession Number : AD0286859

Title :   APPARATUS FOR LOW TEMPERATURE TENSILE DEFORMATION AND SIMULTANEOUS MEASUREMENTS OF THERMAL PROPERTIES OF METALS

Corporate Author : BOEING SCIENTIFIC RESEARCH LABS SEATTLE WASH

Personal Author(s) : ERDMANN,J.C. ; JAHODA,J.A.

Report Date : SEP 1962

Pagination or Media Count : 1

Abstract : I DENTIFIERS: Constantan, Crystal dislocations.A cryostat was constructed and is described which permits the tensile deformation of metal specimens under loads up to 150 kg and simultaneous measurements of the thermal and electrical conductivity, thermal diffusivity, and heat of deformation, preferably at temperatures of liquid He. The apparatus is designed to keep liquid He for approximately 20 hours, which permits the investigation of occurrences requiring high resolution in time as, for example, the discontinuous slip at low temperatures. The measurement of the temperature and small temperature differences is achieved through the application of gas thermometers in connection with electronic differential pressure sensors of small dead volume. Automatic recording allows for an accurate observation of thermal transients. The thermal conductivity measurements are based on the ohlrausch method. Some results which are representative for the application of the apparatus are presented. (Author)

Descriptors :   *CRYOSTATS, *LOW TEMPERATURE RESEARCH, *METALS, *TENSILE PROPERTIES, COPPER ALLOYS, CRYSTAL DEFECTS, CRYSTAL LATTICES, ELECTRICAL CONDUCTIVITY, HELIUM, METAL CRYSTALS, NICKEL ALLOYS, PHASE STUDIES, TEST EQUIPMENT, TEST METHODS, THERMAL CONDUCTIVITY, THERMAL DIFFUSION

Distribution Statement : APPROVED FOR PUBLIC RELEASE