Date of Award
Spring 1999
Document Type
Thesis - Restricted
Degree Name
Master of Science (MS)
Department
Mechanical Engineering
First Advisor
Fournelle, Raymond A.
Second Advisor
Blumenthal, Robert N.
Third Advisor
Domblesky, Joseph P.
Abstract
This thesis presents an evaluation of the effects of alumina blasting on the transient high temperature oxidation of AISl 50B44 alloy steel. Oxidation nucleation and growth mechanisms are known to be sensitive to surface conditions and cold working. Oxide dispersions in dispersion strengthened alloys have also been shown to result in reduced oxidation and improved scale adherence characteristics. In this work, results of thermogravimetric analyses and oxide thickness measurements from induction heated samples are presented. Scanning electron microscopy and optical microscopy were used to characterize the high temperature oxide surfaces, interfaces and layers. Electropolished, surface ground, steel grit blasted and alumina blasted surfaces are compared. Microgravimetric test results and thickness measurements from induction heating trials show a distinct reduction in oxide growth, lower oxidation rates and improved oxide adherence characteristics for alumina blasted surfaces. Results from thermogravimetric analyses, in the temperature range of 927°C to 1093°C, show 73% to 42% reduced oxidation with AI203 surface blasting. Oxidation rates are reduced by surface alumina blasting by an order of magnitude in the 927°c and IO10°C temperature range.
Recommended Citation
Marsch, Stephen J., "Modified High Temperature Transient Oxidation Behavior of 50B44 Steel by Al₂O₃ Blast Treatment" (1999). Master's Theses (1922-2009) Access restricted to Marquette Campus. 4762.
https://epublications.marquette.edu/theses/4762