Accession Number : AD0730038

Title :   Grinding Forces and the Machining of Magnesium Oxide Crystals.

Descriptive Note : Technical rept. no. 4,

Corporate Author : HONEYWELL INC HOPKINS MINN CORPORATE RESEARCH CENTER

Personal Author(s) : Koepke,Barry G. ; Stokes,Robert J.

Report Date : AUG 1971

Pagination or Media Count : 43

Abstract : The forces acting on magnesium oxide crystals during a surface grinding operation have been studied as a function of rate of material removal and crystal orientation, using two different conventional grinding wheels. The results are discussed in terms of the resulting surface and subsurface damage and the geometry of the wheel-workpiece interaction. The results are consistent with the observations that chip information occurs by plastic flow under the alumina wheel, while material is removed completely by brittle fracture under the diamond wheel. It is demonstrated that the stress on an individual chip is within an order of magnitude of the theoretical shear strength of the workpiece, making the presence of both surface and subsurface plastic deformation not only possible but expected in many instances. (Author)

Descriptors :   (*MAGNESIUM OXIDES, GRINDING), (*CERAMIC MATERIALS, MACHINING), SURFACES, FORCE(MECHANICS), SINGLE CRYSTALS, DAMAGE, CUTTING, STRAIN(MECHANICS), ALIGNMENT, FRACTURE(MECHANICS), CRACKS, DYNAMOMETERS

Subject Categories : Ceramics, Refractories and Glass

Distribution Statement : APPROVED FOR PUBLIC RELEASE