Masters Theses

Chung Lim

Abstract

"Since the martensitic reaction is a strain transformation, the transformation of the lattice structure can be induced by an external stresses. This also means that the macroscopic total elastic constant should decrease as the temperature is lowered to Ms on cooling. For the reverse transformation an anomalous decrease of the elastic constant is to be expected as the temperature increases to As on heating. In this experiment measurements of the velocity change of an ultrasonic wave in Fe-Ni alloys were carried out for the reverse martensitic transformation. The deviation from the linear relationship of the velocity change as a function of temperature is identified to be due to dislocation motion. An analysis of the data in terms of a dislocation string model applied to a stacking fault suggests that this deviation reflects the onset of the dislocation instability"--Abstract, page ii.

Advisor(s)

Wuttig, Manfred

Committee Member(s)

Sorrell, Charles A.
Wolf, Robert V., 1929-1999

Department(s)

Materials Science and Engineering

Degree Name

M.S. in Metallurgical Engineering

Publisher

University of Missouri--Rolla

Publication Date

1971

Pagination

vi, 56 pages

Rights

© 1971 Chung Lim, All rights reserved.

Document Type

Thesis - Open Access

File Type

text

Language

English

Subject Headings

Martensitic transformations
Iron-nickel alloys
Strains and stresses

Thesis Number

T 2649

Print OCLC #

6039140

Electronic OCLC #

879211003

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Included in

Metallurgy Commons

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