Harish Vadde

Publication Date

2015

Document Type

Dissertation/Thesis

First Advisor

Kim, Meung J.

Degree Name

M.S. (Master of Science)

Legacy Department

Department of Mechanical Engineering

LCSH

Engineering; Mechanical engineering; Design; Laser welding--Industrial applications; Micromachining; Keys and keyways (Machinery)

Abstract

The purpose of this study is to simulate a finite element model of keyhole formation in micro laser welding and to find out the effects of several parameters including laser beam intensity on the final shape of keyhole formed after welding characterized by width, height of cut and HAZ. A 3D steady state and transient thermo-fluid models of micro laser welding are developed separately in finite element analysis software Ansys and formation of keyhole is monitored continuously. The model is developed considering two phases, liquid metal and solid metal. Boundary conditions are taken in general include convection and heat flux of laser beam. The work material considered is ANSI 304 stainless steel. Finally the simulated results are compared with the experimental values and the results are validated.

Comments

Advisors: kim j. meung.||Committee members: gau terng Jenn; pradip majumdar.

Extent

53 pages

Language

eng

Publisher

Northern Illinois University

Rights Statement

In Copyright

Rights Statement 2

NIU theses are protected by copyright. They may be viewed from Huskie Commons for any purpose, but reproduction or distribution in any format is prohibited without the written permission of the authors.

Media Type

Text

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