Masters Theses

Keywords and Phrases

Materials by design

Abstract

"In applications where the performance of engineered systems may be limited by the properties and performance of the materials, substantial improvement can be achieved by developing a design methodology to synthesize the optimal microstructure that will satisfy macroscopic user defined design criteria. Developing such a systematic design procedure entails the development of models or simulations tor expressing the relationships between the microstructure and macroscopic properties. Such correlations can then serve as inputs to determine the optimal microstructure.

To develop the vision of "design of materials by microstructural optimization," the first paper presents a methodology to tailor the microstructure of alloys. A genetic algorithm is used to optimize the microstructure of an Al-Mg-Sc-Zr alloy to satisfy user defined requirements on low temperature strength, ductility and high temperature strength. In the second paper, the focus is on simulating the motion of dislocation using known dislocation-particle interaction physics. Particle size distribution effects, neglected in the theoretical strength expressions, are considered in the simulation. Shear stress results are presented for an Al-Mg-Sc-Zr alloy and compared with analytical values.

Efforts, such as those considered in the study, aimed at resolving the challenge of converting from a deductive cause/effect approach to inductive goal based approach will be of much practical value to materials developers and system designers. Advanced materials can be developed in significantly shorter time and at much lower cost by employing systematic design procedures instead of relying on heuristics"--Abstract, page iv.

Advisor(s)

Krishnamurthy, K.

Committee Member(s)

Mishra, Rajiv S.
Landers, Robert G.

Department(s)

Mechanical and Aerospace Engineering

Degree Name

M.S. in Mechanical Engineering

Sponsor(s)

University of Missouri Research Board

Publisher

University of Missouri--Rolla

Publication Date

Spring 2004

Journal article titles appearing in thesis/dissertation

  • Microstructural optimization of alloys using a genetic algorithm
  • A study of the effect of particle size distribution on strength of precipitation-hardened alloys

Pagination

ix, 54 pages

Note about bibliography

Includes bibliographical references.

Rights

© 2004 Ambarish Jayant Kulkarni, All rights reserved.

Document Type

Thesis - Restricted Access

File Type

text

Language

English

Library of Congress Subject Headings

Microstructure
Structural optimization
Alloys -- Mechanical properties

Thesis Number

T 8406

Print OCLC #

55135734

Electronic OCLC #

905973427

Link to Catalog Record

Electronic access to the full-text of this document is restricted to Missouri S&T users. Otherwise, request this publication directly from Missouri S&T Library or contact your local library.

http://laurel.lso.missouri.edu:80/record=b5086876~S5

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