Masters Theses

Chungwei Hsia

Abstract

"A1 356 alloy is extensively used for a wide variety of casting applications. The structure is composed of primary dendrites and eutectic silicon formed during the eutectic reaction. It has long been recognized that the shape of the eutectic silicon significantly affects the ductility of the alloy. Traditionally, the morphology of the silicon is changed by certain chemical and/or thermal processes to improve the ductility. Mechanically deforming the castings to "modify" the shape of silicon has been shown by this research to be an effective alternative method to improve the spheroidization rate of eutectic silicon during heat treatment. The best ductility is found when the amount of deformation (or percent reduction) is between 40 and 80%. If deformation equipment is available, this process could greatly reduce the manufacturing time and result in a more ductile product"--Abstract, page ii.

Advisor(s)

Askeland, Donald R.

Committee Member(s)

Kohser, Ronald A.
Howard, Scott A.

Department(s)

Materials Science and Engineering

Degree Name

M.S. in Metallurgical Engineering

Publisher

University of Missouri--Rolla

Publication Date

Spring 1988

Pagination

x, 84 pages

Note about bibliography

Includes bibliographical references (pages 80-83).

Rights

© 1988 Chungwei Hsia, All rights reserved.

Document Type

Thesis - Open Access

File Type

text

Language

English

Thesis Number

T 5659

Print OCLC #

18243412

Electronic OCLC #

1100482682

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Metallurgy Commons

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