Accession Number : AD0702474

Title :   NON-ELASTIC DEFORMATION DURING FRACTURE OF GLASS.

Descriptive Note : Technical rept.,

Corporate Author : WESTINGHOUSE ELECTRIC CORP PITTSBURGH PA MATERIAL SCIENCES DEPT

Personal Author(s) : Lange,F. F.

Report Date : 15 FEB 1970

Pagination or Media Count : 16

Abstract : Micrographs of glass fracture surfaces are presented that unambigously show that non-elastic deformation takes place during crack propagation. These observations are of bent fragments still attached to straight fracture steps that are usually found on fracture surfaces. The mechanism of step formation leading to bent fragments is presented in relation to reported mechanisms of similar fragments (viz., cleavage whiskers) formed on fracture surfaces of quasi-brittle materials (e.g., MgO). These observations are discussed with reference to several non-elastic deformation mechanism that might occur in glass. (Author)

Descriptors :   (*GLASS, DEFORMATION), (*CRACK PROPAGATION, GLASS), FRACTURE(MECHANICS), SURFACE PROPERTIES

Subject Categories : Ceramics, Refractories and Glass

Distribution Statement : APPROVED FOR PUBLIC RELEASE