Accession Number : ADA113497

Title :   Materials Research for Advanced Inertial Instrumentation. Task 1. Dimensional Stability of Gyroscope Structural Materials.

Descriptive Note : Research rept. 1 Oct 80-30 Sep 81,

Corporate Author : CHARLES STARK DRAPER LAB INC CAMBRIDGE MA

Personal Author(s) : Kumar,K ; Petri,F ; Wollam,J

PDF Url : ADA113497

Report Date : Dec 1981

Pagination or Media Count : 48

Abstract : Macroyield experiments were performed on HIP-50 beryllium samples. These samples have been investigated for their microyield behavior during the last reporting period. Micro- as well as macroyield experiments were also performed on as-received and heat treated samples of the X-520 grade of beryllium and these results were compared with those obtained on HIP-50. Significant differences were observed for these two beryllium grades with respect to their 'micro' properties, even though their 'macro' properties were quite comparable. The microyield strength (MYS) values for as-received and heat treated HIP-50 samples were in the range of 17 to 27 kpsi; those for similarly heat treated X-520 samples, however, ranged only from about 8 to 9 kpsi.

Descriptors :   *GYROSCOPES, *INERTIAL SYSTEMS, *BERYLLIUM ALLOYS, *MICROSTRUCTURE, *DEFORMATION, MECHANICAL PROPERTIES, STRAIN(MECHANICS), PLASTIC PROPERTIES, CREEP, YIELD STRENGTH, COMPOSITE MATERIALS, MATHEMATICAL MODELS, FINITE ELEMENT ANALYSIS, X RAY DIFFRACTION, ELECTRON MICROSCOPY, ELECTRONIC SCANNERS

Subject Categories : Properties of Metals and Alloys
      Mechanics

Distribution Statement : APPROVED FOR PUBLIC RELEASE