Masters Theses

Abstract

"The present research is the result of interest in two rather broad, and at first thought, seemingly entirely separate topics: the structure of eutectics and x-ray microscopy. D. Hanson in 1923 in his correspondence with Albert M. Portevin in regard to his article on the structure of eutectics states, "A point that always stuck him (D. Hanson) in examining eutectics was that one of the constituents always formed a continuous phase round the other one. The orientation of one constituent was either constant or varied in a uniform manner. What, however, was the condition of the 'enveloped' constituent, which formed the small particles which were embodied in the continuous constituent? He had never seen any definite statement on that point, but he believed that, when dealing with the iron-carbon eutectoid, Colonel Belaiew expressed the opinion that the cementite was uniformly oriented throughout what was called a single pearlite grain. Did that apply to eutectics? Was the structure of the discontinuous or enveloped phase uniform throughout the colony or grain of eutectic?> He thought that was a somewhat important point, and, if that could be settled, it might help one to understand the method of crystallization of eutectics. The fact that one constituent was continuous and had a uniform orientation was surely important in studying the properties of the whole mass." To date no completely satisfactory answers have been given to these questions, although the fact that the individual particles in a eutectic are built up into a colony or aggregate, the structure of which is the same as that of any other crystal unit, has been shown in several ways. These will be discussed in a later section. In working with the application of various x-ray methods to metallurgy a new technique presented by Dr. C. S. Barrett was tried. The results obtained indicated that this method might be useful in determining answers to some of the questions quoted above"--Introduction, page 1-2.

Advisor(s)

Eppelsheimer, Daniel S., 1909-1988

Department(s)

Materials Science and Engineering

Degree Name

M.S. in Metallurgical Engineering

Publisher

Missouri School of Mines and Metallurgy

Publication Date

1950

Pagination

vii, 86 pages

Note about bibliography

Includes bibliographical references (leaves 83-85).

Rights

© 1950 John Stanton Winston, All rights reserved.

Document Type

Thesis - Open Access

File Type

text

Language

English

Library of Congress Subject Headings

Eutectics
Microscopy
X-ray microscopy

Thesis Number

T 924

Print OCLC #

5982087

Electronic OCLC #

697796297

Included in

Metallurgy Commons

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