News
News and Highlights
Paper written by Connor published in Materials Science and Engineering: A
September 6, 2024
"Effects of Heat Treatment and Geometry on Mechanical Properties and Precipitate Development in Martensitic Additively Manufactured 17-4PH" has been published in Materials Science and Engineering: A. This paper results from research Connor has done in collaboration with NASA and coauthored by Dr. Devin Burns (NASA Langley).
Congratulations Connor!!
July 26, 2024
Connor Varney successfully defended his Ph.D. dissertation titled Microstructural Investigation of the Influence of Geometry on the Mechanical Reliability of Additively Manufactured Metals. Great work and congratulations Dr. Varney!
Congratulations Nic!!
July 23, 2024
Nic Quammen successfully defended his Ph.D. dissertation titled Experimental Characterization and Quantification of Deformation Behavior in a Porous Carbon Fiber Network. Congratulations Dr. Quammen!
Papers by Nic Published in AIAA Journal and Heliyon
June 2, 2024
Two papers written by Nic have been recently published in Heliyon and the AIAA Journal. Links to them here:
Influence of Complex Geometries on Damage Tolerance of Porous Carbon Fiber Network
Local strain quantification of a porous carbon fiber network material
Paper written by Alewi published in Materials Science and Engineering: A
April 7, 2024
"Depth-dependent microstructure and mechanical properties of hot rolled AA7075" has been published in Materials Science and Engineering: A. This paper results from research Alewi has done in collaboration with the Army Reserach Lab and Prof. Haluk Karaca's group (ME, UK).
Nic presented at AIAA SCITECH 2024 Forum
January 13, 2024
Nic recently presented a paper titled "Experimental Quantification of Fracture and Crack Growth in a Porous Carbon Fiber Material" at the AIAA SCITECH 2024 Forum in Orlando, FL. This research was supported by NASA Kentucky.
Paper written by Connor, Tylee, and Imran published in Materialia
August 4, 2023
"Quantifying the Microstructure and Mechanical Property Differences between Bulk and Thin-wall Additively Manufactured Inconel 718" was just published in the journal Materialia. The manuscript was primarily written by Connor Varney, but both Tylee and Imran contributed significantly toward generating and analyzing the data presented in it. Great work!
Alewi and Connor Present at TMS 2023
March 29, 2023
Alewi and Connor traveled to San Diego, CA to present their research. Connor gave two talks on his mechanical characterization of thin walled Inconel 718 and presented a poster on Nic's research. Alewi presented a poster detailing his microstructural characterization of a hot-rolled 7075 aluminum alloy.
Nic presented a paper at AIAA 2023
January 19, 2023
Nic presented a paper titled "Quantification of Directionally Dependent Mechanical Properties and Damage Tolerance of FiberForm" at the 2023 AIAA meeting.
Paper written by Nic published in JALCOM
January 13, 2022
A paper written by Nic titled "Investigation of Low Temperature Oxidation Behavior of MoNbTaW Thin Films" has been published in the Journal of Alloys and Compounds. Link to the paper here.
Nic presents research at Second World Congress of High Entropy Alloys (HEA 2021)
December 9, 2021
At the Second World Congress on High Entropy Alloys Nic gave a presentation titled "High-Throughput Characterization and Testing of MoNbTaW Multi-Principal Element Alloy for Combinatorial Analysis" and presented a poster titled "Investigation of the Initial Stages of Oxidation in MoNbTaW and Comparison to Pure W."
Prof. Rottmann published a paper on the additive manufacturing of Alnico magnets in Materials Today
June 17, 2021
With collaborators at Siemens AG and UC Santa Barbara we found that as-printed Alnico alloys possess the spinodal nanostructure that gives rise to Alnico's magnetic properties. The as-printed alloy peforms similarly to conventionally sintered Alnico, opening up pathways to design magnets with complex geometries inaccessible through conventional fabrication techniques. See the paper here: https://doi.org/10.1016/j.mattod.2021.05.003.
Prof. Rottmann published a paper on the additive manufacturing of Alnico magnets in Materials Today
June 17, 2021
With collaborators at Siemens AG and UC Santa Barbara we found that as-printed Alnico alloys possess the spinodal nanostructure that gives rise to Alnico's magnetic properties. The as-printed alloy peforms similarly to conventionally sintered Alnico, opening up pathways to design magnets with complex geometries inaccessible through conventional fabrication techniques. See the paper here: https://doi.org/10.1016/j.mattod.2021.05.003.
Nic and Connor pass their qualifying exams
May 12, 2021
Nic and Connor passed their qualifying exams to become PhD candidates! Congratuations to both!!
Connor and Nic presented in TMS 2021
March 19, 2021
Connor and Nic virtually presented their research at the 2021 annual meeting of TMS. Here are the titles and details of their presentations:
- R. Nicholaus Quammen and Paul F. Rottmann, High Throughput In Situ Micro-mechanical Testing of Multi-principal Element Alloy Thin Films to Enable Rapid Combinatorial Qualification, TMS 2021 Annual Meeting and Exhibition, Virtual, 2021
- R. Nicholaus Quammen and Paul F. Rottmann, Comparison of Low Temperature Oxidation Behavior of Pure W and MoNbTaW Thin Films, TMS 2021 Annual Meeting and Exhibition, Virtual, 2021.
- Tracy Connor Varney, Paul Rottmann, Micro-scale Characterization of Life-Limiting Areas in Additive Manufactured Parts, TMS 2021, Virtual, 2021
- Tracy Connor Varney, R. Nicholaus Quammen, Nicholas Telesz, Thomas John Balk, Andrew Wessman, Paul F. Rottmann, Effects of Pore Geometry on the Fatigue Properties of Electron Beam Melted Titanium-6Al-4V, TMS 2021, Virtual, 2021
Paper written by Connor published in Met Trans: A
March 12, 2021
A paper titled "Effects of Pore Geometry on the Fatigue Properties of Electron Beam Melted Titanium-6Al-4V" has been published in Metallurgical and Materials Transactions A with Connor as the primary author. Link to the paper here.