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Postdoctoral Researcher

Seyed Hojjatzadeh

2024

Current Position: Assistant Professor at University of Memphis

Graduate Students

* Previous Ph.D. students:

David Garcia

Ph.D. 2020

Thesis: An investigation of the processing history during Additive Friction Stir Deposition using in-process monitoring techniques
Current Position: Materials Scientist at Pacific Northwest National Laboratory

Hunter Rauch
Ph.D. 2021
Thesis: Granular Shape Memory Ceramics
Current Position: Assistant Research Professor at Penn State University

Joey Griffiths

Ph.D. 2021

Thesis: Dynamic and Post-Dynamic Microstructure Evolution in Additive Friction Stir Deposition
Current Position: Postdoc at Lawrence Livermore National Laboratory

Mackenzie Perry

Ph.D. 2021

Thesis: Material Flow and Microstructure Evolution During Additive Friction Stir Deposition of Aluminum Alloys
Current Position: Materials Engineer, NSWC Carderock

Jake Yoder

Ph.D. 2022

Thesis: Origins of Embrittlement of an Al-Zn-Mg-Cu Alloy Post Additive Friction Stir Deposition
Current Position: Senior Materials Scientist,  MELD Manufacturing Corporation

Doug Hartley

Ph.D. 2022

Thesis: Processing Mechanics of Additive Friction Stir Deposition 
Current Position: Materials and Process Engineer, Blue Origin

Greg Hahn

Ph.D. 2023

Thesis: Additive Friction Stir Deposition of Aerospace Al-Zn-Mg-Cu-Zr Alloys: Leveraging Processing and Metallurgical Science for Structural Repair

Kendall Knight

Ph.D. 2024

Thesis: Heat Generation and Transfer in Additive Friction Stir Deposition

* Previous M.S. students:

Jingran Li

Masters of Science 2017
Thesis: Integration of Physically-based and Data-driven Approaches for Thermal Field Prediction in Additive Manufacturing
Current Position: Quality Assurance Engineer at Zyno Medical


Jee Yun Kim
​Masters of Science 2018
​Thesis: Data-driven Methods in Mechanical Model Calibration and Prediction for Mesostructured Materials
Current Position: Process Development Engineer II at Beyond Meat

Ryan Gottwald

​Masters of Science 2022
​Thesis: Exploration of Small-Scale Solid-State Additive Manufacturing for the Repair of Metal Alloys
Current Position: Graduate Student at Virginia Tech

Haozheng Wang

​Masters of Science 2023
​Thesis: Selective Laser Melting of Finemet Soft Magnetic Material
Current Position: Graduate Student at University of Michigan

Reece Preisser

Masters of Science 2024

Current Position: Engineer at Space X

Brett Pennington

Masters of Science 2024

Thesis: Frequency Response Modeling of AFSD Parts with Print Defects

Current Position: Engineer at GE Edison Engineering Development Program

* Previous M. Eng. students:

Daniel Eynisfeld
Masters of Engineering 2018
Current Position: Mechanical Engineer II at Raytheon Technologies


Son-Nam Nguyen
Masters of Engineering 2018
Current Position: Metallurgist at Howmet

Dylan Petersen
Masters of Engineering 2021

Current Position: Characterization Engineer at Li Industries

Robert Palisin
Masters of Engineering 2022

Current Position: Materials Engineer at US Marine 

Robert Callaham

Current Position: Lead Engineer at Salient Motion

Alexander Koelsch

Masters of Engineering 2023

Current Position: Materials Engineer at Pratt & Whitney

 

Undergraduate Students

Aaron Knust
BS Mechanical Engineering 2017
Current Position: Project Engineer for Newport News Shipbuilding
Anna (Kofer) Rawlings
BS Materials Science and Engineering 2017
​Current Position: Ph.D. student, Johns Hopkins University
Jesse Dubrowsky
BS Materials Science and Engineering 2017
Current Position: Sr. Manufacturing Process Engineer at Cue Health
Chauvien Bui-Huynh
BS Materials Science and Engineering 2018
Current Position: Additive Manufacturing Integration Engineer at BLUE ORIGIN

Robert Wear
BS Materials Science and Engineering 2019
Current Position: Staff Engineer at Froehling and Robertson
Irena Shaffer
BS Engineering Science and Mechanics 2019
Current Position: Graduate Student at Virginia Tech

Drs. Joey Griffiths, Mackenzie Perry, Doug Hartley, Jake Yoder, Greg Hahn, and Kendall Knight all did undergraduate research, followed by obtaining Ph.D. degrees in this group.

Since 2022:

Gideon Crawford
BS Materials Science and Engineering, 2022
Current Position: Ph.D. student, Colorado School of Mines

Adam Seigler

BS Materials Science and Engineering, 2022

Current Position: Ph.D. student, Virginia Tech

Luke Hagedorn

BS Materials Science and Engineering, 2023

Current Position: Ph.D. student, Virginia Tech

Mark Pandol

BS Mechanical Engineering, 2023

Current Position: Ph.D. student, Virginia Tech

Camden Holloway 2024

Helen Murray 2023

Duncan McNamara 2023

Oscar Henick 2024

Nandan Chebrolu 2024

Hannah Bogert 2024-2025

Joshua Hansell 2025-present

Jackson Dudan 2024-present

Ryder Gatenby 2025

Caidyn Macphail 2025

 

Senior Design Teams

 

·     Hannah Bogert, Josh Giordano, Adrian Henriquez, Harold Scholten, 2025, “Effects of Heat Treatment on AA7075 in Preparation for AFSD”.

·   Michael Coyle, Camden Holloway, Duncan McNamara, and Helen Murray, 2024, "Using Additive Friction Stir Deposition to Restructure Fe Intermetallics for Al-Si A356 Recycling".

•     Brett Pennington, Omar Almutairi, Rory McMackin, Ryan Van Tine, James Anglin, Conor Sparling,  Jared Rubino, 2023, " MELD Additive Manufacturing & Inert Gas Shroud Optimization of Ti-6Al-4V ". 

·   Luke Hagedorn, Zach Henschel, Nathan Lohr, Owen Tunis, 2023, “Additive Friction Stir Deposition (AFSD) of Al-Cu-Ce Alloy for High Temperature Applications”.

·     Daniel Fiedore, Riley Gates, Alex Thoden, Lily Tran, 2022, Department of Materials Science and Engineering, “Exploring Bonding of Dissimilar Metals Through Additive Friction Stir Deposition: Aluminum and Steel”.

·     Matt Wiggins, Jason Stimson, Luke Bradshaw, Haozheng Wang, 2021, Department of Materials Science and Engineering, “Solid State Recycling of Aluminum Scrap Using Additive Friction Stir Deposition”.

·       Ariel Lee, David Sanches, Will Blankenship, Rob Palisin, 2021, Department of Materials Science and Engineering, “Metallic Glass Synthesis for Metal Matrix Composite Reinforcement”.

·     Kendall Knight, Ross Williams, Annelise Wright, Minh Tran, Rob Callaham, 2021, Department of Mechanical Engineering, “Additive Friction Stir Deposition Heated Print Bed”.

·     Greg Hahn, Sam Ashby, Cameron Yi, Tyler Powers, 2020, Department of Materials Science and Engineering, "Developing a process to create aluminum-graphene composite for Additive Friction Stir Deposition".

·     Alexander Koelsch, Adam Marcy, Joshua Echols, Zhanhong Song, 2020, Department of Materials Science and Engineering, “Reinforcing Aluminum Matrices Using Cerium-Doped Zirconia For Use In Additive Friction Stir Deposition”.

·     Emily Bautista, Dylan Petersen, David Kang, 2019, Department of Materials Science and Engineering, “Investigation of Additive Friction Stir for Al 7075 Hole Repair”.  Best Poster Award. 

·     ​Jake Yoder, Drew Arvan, Kyle Nelson, Neal Patel, 2018, Department of Materials Science and Engineering, "Ceramic 3D Printing by Stereolithography".

·     Mackenzie Jones, Seba Periera, Son-Nam Nugyen, Mathew How Yew Kin, 2017, Department of Materials Science and Engineering, “3D Architectured Twinning Induced Plasticity (TWIP) Steel”.