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Full-Text Articles in Engineering

Non-Toxic Soil Thickeners For Reducing Mudslide Intensity, Mitchell William Jensen Jun 2020

Non-Toxic Soil Thickeners For Reducing Mudslide Intensity, Mitchell William Jensen

Materials Engineering

This project was intended to be a continuation of senior project work done last year by a group consisting of two Materials Engineering students and a Soil Science student. Their report was crucial in identifying a range of food thickeners that could be capable of performing in the mud thickening application. All thickeners that were chosen both this year and last year are biocompatible, to alleviate some toxicity concerns. The food thickeners all belong to a class of compounds known as colloids. Since water is the fluid being thickened, these compounds are more accurately referred to as hydrocolloids. Hydrocolloids are …


The Effect Of Distal Core Flattening And Heat Treatment On 304 Stainless Steel Guide Wires, Andrew Spencer Yap, Bryce Eric Veit, Matthew Frederick Lopez Villena Jun 2020

The Effect Of Distal Core Flattening And Heat Treatment On 304 Stainless Steel Guide Wires, Andrew Spencer Yap, Bryce Eric Veit, Matthew Frederick Lopez Villena

Materials Engineering

The mechanical response of 304 stainless steel guide wires due to different temper conditions and amounts of flattening is to be explored in this project. For this specific project, there is no public literature on the mechanical properties of guide wires with the above conditions through tensile testing or Turns to Failure Testing. To address this, the project with Abbott Vascular will measure the mechanical properties of guide wires using the aforementioned factors. Due to a lack of previous literature on this research topic, there are no quantitative goals for the project, however, any new research compiled in this area …


Microstructure And Tensile Properties Of Close-Die Forged Ti-6al-4v Aircraft Engine Mount, Renee Roeder, Nick Chen, Michael Viksne Jun 2020

Microstructure And Tensile Properties Of Close-Die Forged Ti-6al-4v Aircraft Engine Mount, Renee Roeder, Nick Chen, Michael Viksne

Materials Engineering

The microstructural characteristics of a Ti-6Al-4V close-die forging that passes yield strength specifications are examined and found to be consistent with literature recommendations. Originally, the intent was to compare the microstructure of a forging that passed specification to the microstructure of a forging that did not pass specifications using the imaging software ImageJ. Due to time and safety constraints considering the COVID-19 pandemic, the data that is presented is incomplete data on only the forging that passes specifications. There are no comparisons between the forging that did not pass and the forging that passed.


Study Of Permeability Testing Methods For Composite Laminates, Thomas S. Busse, Giannina Marie M. Yu Jun 2020

Study Of Permeability Testing Methods For Composite Laminates, Thomas S. Busse, Giannina Marie M. Yu

Materials Engineering

Permeability measurements are strong indicators of the effectiveness of evacuation channels within a composite prepreg. The effectiveness of these evacuation channels directly relates to the void content within a processed composite laminate. The goal of Toray Advanced Composites was to compare two permeability tests and determine which one was more reliable, accurate, and economical. The first permeability test method was the Cirrus method, designed by Cirrus Aircraft, a customer of Toray Advanced Composites. The second test was ASTM D8132, the standard method for permeability testing. Additionally, Toray sought to investigate the effect out-time had on the permeability of three different …


Investigation Of Ceramic Firing Processes For Investment Casting Shell Molds, Leonardo Ken Hoaakua Nakamura, Rileigh Anne Cotter Jun 2020

Investigation Of Ceramic Firing Processes For Investment Casting Shell Molds, Leonardo Ken Hoaakua Nakamura, Rileigh Anne Cotter

Materials Engineering

PCC Structurals aims to improve the quality and consistency of their ceramic mold production for their investment casting processes to decrease product loss figures. Although their current production processes result in acceptable quantities of high-quality molds, a significant percentage of defective molds are produced. These defective molds cause appreciable product loss due to casting defects and mold failure. Available literature dictates that high-quality investment casting molds must exhibit fracture strengths within a desired range in order to perform adequately. However, information regarding specific firing procedures which consistently result in ceramic mold strengths within this range is not readily available. To …


Effects Of Surface Finish On High Cycle Fatigue Of Inconel 718, Jessica A. Mcroskey, Matthew Busse Jun 2020

Effects Of Surface Finish On High Cycle Fatigue Of Inconel 718, Jessica A. Mcroskey, Matthew Busse

Materials Engineering

Inconel 718 is a nickel-based superalloy and commonly used rocket engine material due to its excellent properties at elevated temperatures. Its fatigue life relies heavily on the surface roughness, as fatigue introduces and propagates cracks at the surface. Part standards set by Aerojet Rocketdyne typically necessitate surface roughness values from 64 to 125 Ra. However, surface topography and residual stresses incurred from the finishing process also affect the fatigue performance. The specific goal of the project is to perform a literature review and write experimental methods to determine how the surface roughness, topography, and residual stresses from turning, grit blasting, …