Engineering Commons^™

In Situ Defect Detection Using Three Color Spectroscopy In Laser Powder Bed Additive Manufacturing, Andrew Drieling

The University Honors Program

Additive Manufacturing (AM) provides a way to create parts that would be extremely difficult or impossible with conventional manufacturing processes. However, AM also introduces defects, which are detrimental to the mechanical performance. These defects are potentially unknown until post-processing inspection and testing, wasting time and resources on an unusable part or initiating unexpected failure. Historically, spectroscopy has successfully been used for in situ monitoring of laser welding, using changing parameters in the generated plume to predict defects. In situ monitoring using a visible spectrometer for fabrication of Alloy 718 on a test bed laser powder bed fusion system is performed. …

Automated Impact Device, Jason Montavon

The University Honors Program

This report outlines the progress and development ofan automated impact device (AID). This device was designed to be inexpensive, user-friendly, and modular. Developed with the parameters of vibration analysis. the AID can perform a variety of experimental procedures. Using simple C code and components that are both affordable and easy to obtain, the AID was designed to perform the same task as its more expensive counterparts. With this thought-process, the device was engineered to easily and quickly interchange components depending on the required task. Outlined in the report is the code used to operate the AID and the basic components …

Engine Analysis, Thomas Gaier

The University Honors Program

Engines were invented two hundred years ago but early dynamometers did not benefit from the technological advances until the last hundred years. A John Deere Model E hit-and-miss engine has a nominal power of3hp. The purpose of this project was to analyze this engine, including verifying power.

Outcomes of the analysis of this engine include brake horsepower and thermal efficiency. The first step was to put the engine under a load. This was done with a water pump system. Pressure, water flow, and rotation were measured from tests using the system.This type of system is analogous to a water brake …

Micro-Raman Investigation Of Residual Stresses In Sic/Sic Composites, Kaitlin Kollins

The University Honors Program

Ceramic Matrix Composites (CMCs) are being developed for use in extreme operating conditions. Specifically, there is interest to replace superalloys with Silicon-Carbide/Silicon-Carbide (SiC/SiC) CMCs in the hot section of gas turbine engines because of their lower densities, high temperature performance, and oxidation resistance. Due to the high temperature processing conditions of SiC/SiC CMCs, there are thermal residual stresses inherent to the material. This study focused on using micro-Raman Spectroscopy on as manufactured SiC/SiC CMCs to measure and investigate the residual stresses within a fiber and the matrix material. Following the silicon Raman active mode at 520 cm-1 and the SiC …