Accession Number : ADA308864

Title :   Damage and Failure Behavior of SiC SCS-6/Timetal 21S Metal Matrix Composite.

Descriptive Note : Final rept. 9 Jan 92-29 Feb 96,

Corporate Author : SRI INTERNATIONAL MENLO PARK CA

Personal Author(s) : Shockey, D. A. ; Kirkpatrick, S. W. ; Schmidt, C. G. ; Kobayashl, T.

PDF Url : ADA308864

Report Date : MAR 1996

Pagination or Media Count : 63

Abstract : SRI International is performing a program of research to (1) determine the microstructural mechanisms underlying failure of metal matrix composites (MMCs), (2) measure the deformation and failure properties of MMCs under combined loading conditions, and (3) develop computational models for deformation and failure. In addition, we are helping the Wright Laboratory determine the microfailure sequence in a brittle matrix composite (BMC). This report describes the results obtained under Phase 1 of the research effort. The work will be completed in Phase 2 and reported in detail in a more comprehensive technical report. We quantified and analyzed the topography of fracture surfaces to reconstruct the fracture process and delineate the sequence of microfailure events occurring in SCS-6/Timetal 21S MMC under tensile load at room and elevated temperatures and under thermomechanical fatigue conditions. We performed a similar analysis on a SiC-fiber-reinforced borosilicate glass BMC tested at elevated temperature at the Wright Laboratory.

Descriptors :   *DAMAGE, *FAILURE, *METAL MATRIX COMPOSITES, *SILICON CARBIDES, THERMOMECHANICS, MATHEMATICAL MODELS, MICROSTRUCTURE, COMPOSITE MATERIALS, HIGH TEMPERATURE, DEFORMATION, TENSILE PROPERTIES, MATRIX MATERIALS, GLASS, TOPOGRAPHY, FRACTURE(MECHANICS), SURFACES, BRITTLENESS, FATIGUE(MECHANICS), THERMAL FATIGUE, BORON OXIDES, SILICATES, REINFORCING MATERIALS.

Subject Categories : Inorganic Chemistry
      Laminates and Composite Materials
      Mechanics

Distribution Statement : APPROVED FOR PUBLIC RELEASE