"An adiabatic anisothermal differential calorimeter for the study of room temperature deformed 99.999% pure copper has been constructed. An annealed and a deformed specimen were heated at a constant rate in adiabatic surroundings and the differences in energy released between samples was obtained. The control circuits were automatic. Deformation was by elongation ranging from 12 to 40%, and the corresponding energy found was from 1.9 to 5.3 calories/gram-atom. No recovery energy was found. The results obtained generally agree with published results and, in particular, verify Gordon's isothermal annealing results. It is proposed that the criteria for the presence of recovery energy in the annealing spectrum of room temperature deformed metals is a high stacking fault energy and/or the presence of impurities, and that the recovery energy is mainly due to the relaxation of dislocations from high energy configurations"--Abstract, Page ii.
Leighly, Hollis P., 1923-2004
Materials Science and Engineering
Ph. D. in Metallurgical Engineering
United States. Bureau of Mines
University of Missouri--Rolla
viii, 138 Pages
© 1969 George Juri Filatovs, All rights reserved.
Dissertation - Open Access
Library of Congress Subject Headings
Calorimeters -- Design
Calorimetry -- Design
Heat -- Transmission -- Mathematical models
Print OCLC #
Electronic OCLC #
Link to Catalog Recordhttp://laurel.lso.missouri.edu/record=b1067289~S5
Filatovs, George Juri, "Calorimetry of room temperature deformed copper" (1969). Doctoral Dissertations. 2139.