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There is now a CONTENT FREEZE for Mercury while we switch to a new platform. It began on Friday, March 10 at 6pm and will end on Wednesday, March 15 at noon. No new content can be created during this time, but all material in the system as of the beginning of the freeze will be migrated to the new platform, including users and groups. Functionally the new site is identical to the old one. webteam@gatech.edu
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THE SCHOOL OF MATERIALS SCIENCE AND ENGINEERING
GEORGIA INSTITUTE OF TECHNOLOGY
Under the provisions of the regulations for the degree
DOCTOR OF PHILOSOPHY
on Tuesday, November 19, 2019
12:00 PM
in MRDC 4211
will be held the
DISSERTATION DEFENSE
for
Morris Satin
“Characterization and Modeling of Two Dimensional Crack Growth in Gas Turbine Materials”
Committee Members:
Prof. William S. Johnson, Advisor, MSE/ME
Prof. Richard Neu, Advisor, MSE/ME
Prof. Arun Gokhale, MSE
Prof. Olivier Pierron, ME
Prof. Christopher Muhlstein, MSE
Abstract:
Surface flaws are common in gas turbine components and undergo a complex process of fatigue crack growth under mechanical and thermal loading. This project seeks to bring greater clarity and understanding to the transition process of surface flaws to through cracks by implementing a transition method, and developing the associated codes and equations to do so based on careful consideration of boundary conditions, experimental data and finite element simulations. In addition the effect of thermomechanical fatigue in surface flaws in Inconel 718 is investigated. Inconel 718 displays a high-temperature time-dependent intergranular fracture mode that is explored experimentally, characterized, and modeled in the MPYZ-TMF fatigue crack growth code. New models using the latest findings are proposed to accurately predict the shape, location, and overall lifetime of various surface flaw geometries.
