Mechanical Engineering ETDs

Publication Date

Fall 11-13-2017

Abstract

Uni-axial tensile tests were conducted on multiple dog-bone shaped poly-crystalline Aluminum specimens. The goal for this study was to understand the effects of voiding in structural aluminum and how voids grow under tension. The voids were represented by simply drilling and reaming one or more holes in varying patterns in the center of the sample. The testing clearly showed that the different hole patterns affect the area growth of voids. It also compares the developmental growth of a plasticity zone around samples with one hole to a previous study done with a different specimen shape(Ray,2003). In order to look at the microscale of the plastic deformation, a Scanning Electric Microscope (SEM) was used to examine the samples. To look at the Nano scale of the plastic deformation, Atomic Force Microscopy (AFM) experiments were performed at multiple locations on various samples pulled to different levels of stress.

Keywords

Void_Growth Aluminum Tension

Degree Name

Mechanical Engineering

Level of Degree

Masters

Department Name

Mechanical Engineering

First Committee Member (Chair)

Tariq Khraishi

Second Committee Member

Yu-Lin Shen

Third Committee Member

Mehran Tehrani

Document Type

Thesis

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