Browsing Auburn Theses and Dissertations by Author "Overfelt, Ruel A. (Tony)"

Now showing items 1-12 of 12

Advancements in Vacuum Process Molding and Casting

Capps, Johnathon (2005-08-15)

Vacuum assisted molding, or ‘V’ Process molding, possesses many benefits over other sand casting processes. However, the process lacks the high cooling rates and speed of solidification that other sand casting processes ...

An Autonomous Digging Vehicle

Guasti, Courtney (2006-08-15)

This project is intended to develop a self-guided digging vehicle for various applications. Hence, the main focus for this vehicle is to have the ability to dig through loose soils. This project has focused on key digging ...

Design and Development of a Targeting System Using Matlab

Murphree, Stephen (2008-08-15)

Advances in security equipment and technology have always been essential to prevent malefactors from performing criminal acts. Therefore, it is essential to develop new ways to deter wrongdoers. It is the intent of this ...

Development of CaZrO3-Based Hydrogen Sensors with Oxide Reference Electrodes for Molten Aluminum

Krishnan, Vivek (2006-12-15)

Hydrogen is a major cause of gas porosity in aluminum and is frequently removed from the melt prior to casting. The degassing process can be better controlled if the hydrogen content in the melt is known. Thus, gas sensors ...

Effect of Experimental Parameters on Simultaneous Thermal Analysis

Shao, Rui (2007-05-15)

Differential Scanning Calorimeter (DSC) is a very effective way to measure both the heat capacity and the phase transition temperature in thermal processes. With the continued development of computational models of thermal ...

The Effects of Small Changes in Alloy Chemistry on the Solidification Behaviour of the Cobalt-Base Superalloy FSX-414

Ronan, Kevin P. (2010-04-14)

Controlled casting experiments have confirmed the industrial experience that small changes in alloy chemistry dramatically affect the frequency and severity of microporosity and hot tear defects in investment castings made ...

Experimental and Computational Study of Fluid Flow and Heat Transfer in the Lost Foam Casting Process

Liu, Xuejun (2005-12-15)

The Lost foam casting (LFC) process has been considered as one of the most significant modern developments in casting technology. The use of polymer foam patterns allow complex shapes to be created by integrating several ...

Finite Element Analysis and Life Estimation of a Permanent Cylindrical Mold with ANSYS and Coffin-Manson Approach

Roy, Ajay (2005-08-15)

Thermal fatigue is the most severe problem encountered by a permanent mold, leading to heat checking and cracking which affects the dimensional stability of the mold. Developing a methodology to determine the optimal ...

Measurements of the thermal expansion and heat capacity of metals by electromagnetic levitation

Guo, Baojian (2006-08-15)

Electromagnetic levitation is a very useful non-contact melting technique that can be exploited for measurements of thermophysical properties of many reactive metals and alloys. This study focused on thermal expansion and ...

Microstructural effects on fracture behavior of particulate composites: Investigation of toughening mechanisms using optical and boundary element methods

Kitey, Rajesh (2006-08-15)

Particulate polymer composites are used in a variety of engineering applications. These are generally two phase materials with polymeric phase reinforced by a filler phase to improve overall mechanical, thermal and/or ...

Radiative emissivity of metals and oxidized metals at high temperature

Teodorescu, George (2007-08-15)

Radiative emissivities of metals at high temperatures influence the energy balance and remote sensing in a wide range of manufacturing processes as well as research and development activities and thereby determine performance ...

Transient Liquid Phase Bonding of a Third Generation Gamma-Titanium Aluminum Alloy - Gamma Met PX

Butts, Daniel (2005-08-15)

The research work presented here discusses transient liquid phase (TLP) bonding of a current (i.e. third) generation gamma-TiAl alloy known as Gamma Met PX (GMPX). Effective implementation of GMPX in service is likely to ...