Publication Date

2017

Document Type

Dissertation/Thesis

First Advisor

Shelton, John

Degree Name

M.S. (Master of Science)

Department

Department of Mechanical Engineering

LCSH

Mechanical engineering||Engineering

Abstract

The hardness performance of LENS processed 316 Stainless Steel (SS) is investigated. Hardness performance of LENS processed 316 SS is important to identify its strength, resistance to wear, quality, failure control, predicting life time, determining proper applications and its evaluating performance. Rockwell Hardness test was performed at 100kgf load and 150kgf load respectively. A Finite element model was developed for the indentation process and obtain contact radius and contact pressure was verified with experimental results obtained from white light interferometry. The Rockwell hardness test was performed according to ASTM E18--17e1 test procedure and a Tungsten carbide indenter was used for the hardness test of Roll formed 316 SS and Additive manufactured 316 SS. The indentation process was simulated using ANSYS APDL software with different contact models and different loads. It was found that the hardness performance is affected by porosity, which is key factor in determining the hardness performance of the additive-manufactured samples.

Comments

Advisors: John Shelton.||Committee members: Iman Salehinia; Federico Sciammarella.||Includes illustrations.||Includes bibliographical references.

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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