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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 Wednesday, June 17, 2020
1:00 PM
via
BlueJeans Video Conferencing
https://bluejeans.com/488296600
will be held the
DISSERTATION PROPOSAL DEFENSE
for
Katie Koube
"Failure Mechanisms in Additively Manufactured Stainless Steel 316L Under Dynamic Loading Conditions"
Committee Members:
Prof. Naresh Thadhani, Advisor, MSE
Prof. Joshua Kacher, Advisor, MSE
Prof. David McDowell, ME/MSE
Prof. Christopher Saldana, ME
Prof. Hamid Garmestani, MSE
Abstract:
This work will investigate the evolution and mechanisms of dynamic tensile (spall) failure in 3D printed SS316L alloys fabricated through two different techniques: (a) PBF with varying degrees of porosity, grain size and texture preference and (b) extrusion-based printing of composite of metal oxides and solvated polymer that can be post processed in a reducing environment to create metallic structures. Spall failure is driven by the interaction between reflecting shock waves off of free surfaces of an impacting plate and target sample generating a state of tension. Defect structures and even grain orientations relative to shock wave propagation can influence the spall failure characteristics. Thus, the spall properties and failure responses of 3D printed steels will be studied in many different defect states and orientations.
Objectives of this work include:
Spall properties and failure response will be benchmarked against wrought specimens.
