Accession Number : AD0697923

Title :   THE EFFECT OF SURFACE FINISHING ON STRUCTURAL-CERAMIC FAILURE.

Descriptive Note : Interim rept.,

Corporate Author : NAVAL RESEARCH LAB WASHINGTON D C

Personal Author(s) : McKinney,Karl R. ; Herbert,Charles M.

Report Date : 05 NOV 1969

Pagination or Media Count : 28

Abstract : A relationship between fracture strength and surface finish of brittle nonmetallic materials was examined and related to surface crack theory. An experimental illustration used AlSiMag 614, a 94% pure alumina with a near zero porosity. Specimen disks 3.625 + 0.031 in. in diameter by 0.085 + 0.010 in. thick were prepared, each having a specific surface finish. Testing was done with a biaxial ball and ring test. Observations were made regarding other materials and other abrasive powders. (Author)

Descriptors :   (*STRUCTURAL MEMBERS, CERAMIC MATERIALS), (*PRECISION FINISHING, CERAMIC MATERIALS), (*GRINDING, DEGRADATION), (*CERAMIC MATERIALS, FRACTURE(MECHANICS)), ALUMINA, ABRASIVES, PARTICLE SIZE, BRITTLENESS, CRACK PROPAGATION, STRESSES, SURFACE PROPERTIES, MECHANICAL PROPERTIES, GLASS, TEST METHODS

Subject Categories : Ceramics, Refractories and Glass

Distribution Statement : APPROVED FOR PUBLIC RELEASE