Advisor

Rhee, Hongjoo

Committee Member

Felicelli, Sergio D.

Committee Member

Wang, Liang

Date of Degree

1-1-2013

Document Type

Graduate Thesis - Open Access

Major

Mechanical Engineering

Degree Name

Master of Science

College

James Worth Bagley College of Engineering

Department

Department of Mechanical Engineering

Abstract

Advancements in the area of additive manufacturing have led to the development of new methods with the purpose of optimizing component properties and expanding operating environments. In a comparative study, the influence of process parameters including beam and laser current, translation speed, and wire feed and deposition rate on 316L stainless steel deposits produced by both Laser Engineered Net Shaping (LENS®) and Electron Beam Freeform Fabrication (EBF3) processes are investigated. Tensile tests are used to obtain information on the mechanical properties of the specimens. A metallographic analysis is performed using optical microscopy and SEM to characterize solidification grain structure, porosity, secondary dendrite arm spacing, and possible modes of failure. This study highlights the distinct characteristics of both additive methods and how they lead to different microstructure and mechanical properties. Also included in this study is the upgrade and repair of the LENS machine at CAVS.

URI

https://hdl.handle.net/11668/19042

Comments

LENS||EBF3

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