John Copley
- Program Year: 3
- Academic Institution: Princeton University
- Field of Study: Materials Science and Mineral Physics
- Academic Advisor: Thomas Duffy
- Practicum(s):
Lawrence Livermore National Laboratory (2023) - Degree(s):
M.S. Metallurgical and Materials Engineering, Colorado School of Mines, 2020; B.S. Metallurgical and Materials Engineering, Colorado School of Mines, 2018
Summary of Research
Where thermodynamics controls whether a phase transformation should happen, kinetics control whether, and how quickly, that transformation does happen. By using time-resolved diffraction and piezo-driven rapid compression with a dynamic diamond anvil cell, I am able to probe the effects of compression rate and over-pressure on the kinetics of phase transformations, helping address uncertainty as to the effects these parameters have on the results we see in laboratory high-pressure experiments, but also real world events, which occur over a variety of time scales. My recent work has focused on CdSe and Fe transforming under high pressure, but ambient temperature conditions. Characterization and initial studies using a dDAC compatible with laser heating should help open the door for future experiments combining high compression rate and high temperatures.Publications
Papers:Copley, J.A., Coury, F.G., Ellyson, B. Clarke, A.J. Identification of Potential TRIP Alloys by CALPHAD Methods, an Accessible Approach. JOM 75, 4039–4046 (2023). https://doi.org/10.1007/s11837-023-05930-3
Copley, J.A., Coury, F.G., Ellyson, B. et al. In-Situ Observation of FCC→HCP Transformation-Induced Plasticity Behavior During Dynamic Deformation of CoCrNi Multi-principal Element Alloys. Metall Mater Trans A 53, 1821–1830 (2022). https://doi.org/10.1007/s11661-022-06636-y
Copley, J.A., Ellyson, B., Klemm-Toole, J. et al. Considerations of Sample Thickness and Detector Placement in Intensity Limited Polychromatic X-Ray Diffraction Experiments. J. dynamic behavior mater. 8, 492–499 (2022). https://doi.org/10.1007/s40870-022-00345-8
Tourret, D., Klemm-Toole, J.,... Copley, J.A., et al. Morphalogical stability of solid-liquid interfaces under additive manufacturing conditions. Acta Materialia, 250, (2023) 118858 https://doi.org/10.1016/j.actamat.2023.118858
Ellyson, B., Saville, A.,... Copley, J.A., et al. High strain rate deformation of aged TRIP Ti-10V-2Fe-3Al (wt%) examined by in-situ synchrotron X-ray diffraction. Acta Materialia, 245 (2023) 118621 https://doi.org/10.1016/j.actamat.2022.118621
F. Coury, D. Santana, Y. Guo, J. Copley, L. Otani, S. Fonseca, G. Zepon, C. Kiminami, M. Kaufman, A. Clarke, Design and in-situ characterization of a strong and ductile Co-rich multicomponent alloy with transformation induced plasticity" Scripta Materialia, vol 173, 2019, pp.70-74 https://doi.org/10.1016/j.scriptamat.2019.07.045
F. Coury, T. Butler, K. Chaput, A. Saville, J. Copley, J. Foltz, P. Mason, K. Clarke, M. Kaufman, and A. Clarke, Phase equilibria, mechanical properties and design of quaternary refractory high entropy alloys Materials Design (155) 2018, pp.244-256 https://doi.org/10.1016/j.matdes.2018.06.003
Presentations:
J. Copley, J.S. Smith, G. Shen. N. Velisavljevic, T.S. Duffy, Time-Resolved Transformation Kinetics of the BCC to HCP Transition in Iron Using Piezo-Driven Compression, 23rd Biennial Conference of the APS Topical Group on Shock Compression of Condensed Matter, 2023 Chicago, IL, Contributed Talk
J. Copley, G. Shen, J. Smith, N. Velisavljevic, T. Duffy, Dynamic Diamond Anvil Cells as a Tool for Kinetic Studies, APS March Meeting 2022, Chicago, IL, Contributed Talk
J. Copley, F. Coury, B. Ellyson, J. Klemm-Toole, N. Kedir, C. Kirk, W. Chen, N. Parab, T. Sun, K. Fezzaa, K. Clarke, A. Clarke, Alloying and Strain Rate Effects on the Deformation Mechanisms of CoCrNi MPEAs, TMS 2020, San Diego, CA, Contributed Talk
J. Copley, B. Ellyson, J. Klemm-Toole, J. Gao, W. Chen, N. Parab, T. Sun, K. Fezzaa, K. Clarke, A. Clarke, The Prediction and Importance of TRIP Behavior in CoCrNi Alloys", Nov 2019, World Congress on High Entropy Materials, Seattle, WA, Contributed Talk
Awards
Harvey Scholarship, Colorado School of Mines (Aug 2015-Aug 2020)Outstanding Graduating Senior, Department of Metallurgical and Materials Engineering, Colorado School of Mines (May 2018)
George S. Ansell Department of Metallurgical and Materials Engineering University Fellow (Aug 2018-Aug 2020)
Alpha Sigma Mu: Materials Engineering Honor Society (April 2018-Aug 2020)
3rd Place Student Poster Presentation, World Congress on High Entropy Alloys
TMS Materials Bowl Champion 2018, 2019, 2020
William G. Bowen Fellowship, Princeton University (Aug 2020-May 2021)