Masters Theses

Keywords and Phrases

Laser Aided Manufacturing Process (LAMP)

Abstract

"Laser Aided Manufacturing Process (LAMP) is a rapid prototyping process used to build three dimensional functional metal and ceramic parts. The process developed in the LAMP laboratory at University of Missouri-Rolla uses a 5-axis fadal CNC machine and a 2.5 KW Nd:YAG (TEM00) Rofin Sinar laser. The laser power and metal/ceramic powder are the input along with auxiliary systems such as shielding gas delivery, RT data acquisition, coolant system. The hybrid process makes use of metal deposition and machining to obtain parts meeting design tolerances.

LAMP is used to improve upon the process of Thermal Barrier Coating (TBC) deposition and enhance the material properties of TBC. LAMP is proposed to give better bond strength as a metallurgical bond is formed between the coating and the substrate. Improved life and operating temperatures of the coatings can result in increased efficiency of operation of the turbines and engines and result in better cost efficiency. Functional grading of the 8% Yittria stabilized Zirconia and NiCoCrAlY TBC is evaluated for thermo mechanical properties such as surface roughness, porosity to evaluate the deposition quality. The LAMP is optimized by using Taguchi method of Design of Experiments to obtain the improved TBC. The variation of the influence of various control factors with the changing composition of NiCoCrAlY and Zirconia is studied and influential control factors are identified. The variation of energy density as a function of surface roughness and material composition is plotted. The coating is characterized by residual stress, microhardness and micro structure analysis"--Abstract, page iii.

Advisor(s)

Liou, Frank W.

Committee Member(s)

Landers, Robert G.
Chandrashekhara, K.

Department(s)

Mechanical and Aerospace Engineering

Degree Name

M.S. in Manufacturing Engineering

Publisher

University of Missouri--Rolla

Publication Date

Spring 2005

Pagination

xiii, 78 pages

Note about bibliography

Includes bibliographical references (pages 76-77).

Rights

© 2005 Yashodhan Joshi, All rights reserved.

Document Type

Thesis - Open Access

File Type

text

Language

English

Library of Congress Subject Headings

Lasers -- Industrial applications
Coatings -- Thermal properties

Thesis Number

T 8794

Print OCLC #

63115035

Electronic OCLC #

993708344

Included in

Manufacturing Commons

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