Doctoral Dissertations

Abstract

"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.

Advisor(s)

Leighly, Hollis P., 1923-2004

Department(s)

Materials Science and Engineering

Degree Name

Ph. D. in Metallurgical Engineering

Sponsor(s)

United States. Bureau of Mines

Publisher

University of Missouri--Rolla

Publication Date

1969

Pagination

viii, 138 pages

Note about bibliography

Includes bibliographical references (Pages 116-119).

Rights

© 1969 George Juri Filatovs, All rights reserved.

Document Type

Dissertation - Open Access

File Type

text

Language

English

Subject Headings

Calorimeters -- Design
Calorimetry -- Design
Heat -- Transmission -- Mathematical models

Thesis Number

T 2280

Print OCLC #

6011945

Electronic OCLC #

844735126

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