Masters Theses

Sriram Prabhu

Keywords and Phrases

Energy balance

Abstract

"Research in Laser Metal Deposition (LMD) has been done rigorously in the past. However, the main challenge that still exists is the production of complex part geometries having overhang features. Production of such features requires individual tracks with a high aspect ratio and wider bead angle. The use of destructible/ non-destructible support structures involves costly post production operations which increase production cost. Tilting or moving the deposition surface can be useful to create overhangs but are applicable only to special cases. Since such techniques have to be used by the manufacturing community, the techniques need to be simple in calculation and easy to understand. The paper presented in this thesis presents a novel technique of depositing a track having a wide welding angle. This novel method solves the above mentioned challenge by depositing tracks having the capability to build overhang features. The new approach that has been implemented in this paper involves using the energy balance to estimate the amount of superheat present in the melt pool and correlating it with the weld bead angle. Attention has been paid to make the model computationally less cumbersome. Furthermore, the technique has been applied to a produce a couple of tracks with predetermined welding angles successfully"--Abstract, page iv.

Advisor(s)

Liou, Frank W.

Committee Member(s)

Murray, Susan L.
Cudney, Elizabeth A.

Department(s)

Mechanical and Aerospace Engineering

Degree Name

M.S. in Manufacturing Engineering

Sponsor(s)

Missouri University of Science and Technology. Center for Aerospace Manufacturing Technologies

Publisher

Missouri University of Science and Technology

Publication Date

Summer 2012

Pagination

x, 51 pages

Note about bibliography

Includes bibliographical references (pages 435-438).

Rights

© 2012 Sriram Prabhu, All rights reserved.

Document Type

Thesis - Open Access

File Type

text

Language

English

Subject Headings

Pulsed laser depositionWelding

Thesis Number

T 10066

Print OCLC #

828936778

Electronic OCLC #

795743109

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Included in

Manufacturing Commons

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