Accession Number : AD0732382

Title :   An Electron Microscope Study of Configurational Equilibrium at Twin-Grain Boundary Intersections in FCC Metals.

Descriptive Note : Technical rept. no. 3, Apr-Nov 70,

Corporate Author : UNIVERSITY OF SOUTHERN CALIFORNIA LOS ANGELES DEPT OF ELECTRICAL ENGINEERING

Personal Author(s) : Horylev,Richard J. ; Murr,Lawrence E.

Report Date : SEP 1971

Pagination or Media Count : 122

Abstract : A transmission electron microscopy study of 304 stainless steel thin films was undertaken in order to completely characterize twin boundary-grain boundary intersection systems in fcc metals. The degrees of freedom associated with each grain boundary were determined and their interrelationships with grain boundary energy and associated torques were systematically investigated. A geometric configurational theory was developed to explain the existence of interfacial torques at twin boundary-grain boundary intersections and the verification of the physical existence of these torques was obtained. The origin, as well as the effects of torques on the twin boundary-grain boundary intersection system, were determined, and high- and low-torque values were defined. (Author)

Descriptors :   (*STAINLESS STEEL, GRAIN BOUNDARIES), DISLOCATIONS, INTERFACES, ELECTRON MICROSCOPY, TORQUE

Subject Categories : Metallurgy and Metallography
      Crystallography

Distribution Statement : APPROVED FOR PUBLIC RELEASE