Accession Number : ADA290930

Title :   Fractography of Advanced Structural Ceramics: Results from the VAMAS Round Robin Exercise.

Descriptive Note : Final rept. Feb 93-Jun 94,

Corporate Author : ARMY RESEARCH LAB WATERTOWN MA MATERIALS DIRECTORATE

Personal Author(s) : Swab, Jeffrey J. ; Quinn, George

PDF Url : ADA290930

Report Date : DEC 1994

Pagination or Media Count : 154

Abstract : Fractography of ceramic specimens and components is critical to the design and future use of ceramic materials in commercial applications. In 1992 the U.S. Department of Defense released Military Handbook 790 'Fractography and Characterization of Fracture Origins in Advanced Structural Ceramics' which furnished guidelines for the comprehensive interpretation of ceramic fractographic information. Even with the release of this handbook there were still some issues which warranted further study. A round robin exercise sponsored by the Versailles Project on Advanced Materials and Standards (VAMAS) was conducted to determine the applicability of the handbook and to attempt to clarify any ambiguous sections or issues. The exercise was divided into three topics. Topic #1 addressed the detection and interpretation of machining damage on photographs of ceramic specimens. Topic #2 dealt with the fractographic analysis of ceramic specimens. Topic #3 was optional, and asked the participants to perform fractography on a ceramic material of their choice. (MM)

Descriptors :   *COMPOSITE MATERIALS, *FRACTOGRAPHY, *CERAMIC MATERIALS, *WHISKER COMPOSITES, MECHANICAL PROPERTIES, SCANNING ELECTRON MICROSCOPES, MICROSTRUCTURE, DAMAGE, STRESS ANALYSIS, OPTICAL DETECTION, MACHINING, CRACKING(FRACTURING), GRAIN SIZE, ILLUMINATION, POROSITY, STRENGTH(MECHANICS), FRACTURE(MECHANICS), CRACK PROPAGATION, DEFECTS(MATERIALS), PHOTOGRAPHY, ZIRCONIUM, DESIGN CRITERIA, HANDBOOKS, SILICON CARBIDES, SILICON NITRIDES, SINTERING, ALUMINATES, GRAZING, WHISKERS(CRYSTALS).

Subject Categories : Ceramics, Refractories and Glass
      Laminates and Composite Materials
      Fabrication Metallurgy

Distribution Statement : APPROVED FOR PUBLIC RELEASE