Accession Number : AD0760007

Title :   Crack - Initiation Mechanisms.

Descriptive Note : Technical rept.,

Corporate Author : GEORGE WASHINGTON UNIV WASHINGTON D C INST FOR THE STUDY OF FATIGUE FRACTURE AND STRUCTURAL RELIABILITY

Personal Author(s) : Wood,William A. ; Gilmore,Charles M.

Report Date : APR 1973

Pagination or Media Count : 20

Abstract : Basic requirements are noted for initiating a crack in a solid. A brief outline is given of the arguments underlying current conventional dislocation theories. Finally attention is drawn to cases where these arguments can hardly hold and which seem to call for an alternative mechanism. One, a dynamic overload mechanism, is discussed and illustrated by scanning-electron micrographs. (Author Modified Abstract)

Descriptors :   (*CRACK PROPAGATION, DYNAMICS), DISLOCATIONS, STRESSES, FATIGUE(MECHANICS), TITANIUM, STEEL, ELECTRON MICROSCOPY

Subject Categories : Metallurgy and Metallography
      Solid State Physics

Distribution Statement : APPROVED FOR PUBLIC RELEASE