• Title
    Group Leader, Advanced Materials Process Science Group
  • Email
  • Phone
    (925) 423-3023
  • Organization

Research interests

Advanced manufacturing, process monitoring, defect detection, anomaly detection, materials discovery, alloy development, metals processing, synchrotron science, in situ characterization

Career path

Nick is a materials scientist with experience in metal additive manufacturing, process monitoring, and materials discovery. In addition to leading the AMPS group, Nick currently lead a team of scientists and engineers working to develop and deploy new process monitoring approaches for laser powder bed fusion. 

Subject Matter Expertise

Laser powder bed fusion, advanced manufacturing for metals, X-ray diffraction, high speed imaging and radiography, process monitoring.

Ph.D. Chemistry, Northwestern University, 2015

B.S. Chemistry, Georgetown University, 2010


For a full list, see: Google Scholar

Templeman, J. R,; Wachtor, A. J.; Flynn, E. B.; Depond, P. J.; Forien, J.-B.; Guss, G. M.; Calta, N. P.; Matthews, M. J. Detection of keyhole pore formations in laser powder bed fusion using acoustic process monitoring measurements. Additive Manufacturing, 2022, 55, 102735. DOI: 10.1016/j.addma.2022.102735

Forien, J.-B.; Calta, N. P.; Depond, P. J.; Guss, G. M.; Roehling, T. T.; Matthews, M. J. Detecting keyhole pores and monitoring process signatures in laser powder bed fusion: an in situ pyrometry and ex situ radiography correlation. Additive Manufacturing, 2020, 35, 101336. DOI: 10.1016/j.addma.2020.101336

Khairallah, S; Martin, A. A.; Lee, J. R. I.; Guss, G.; Calta, N. P.; Hammons, J. A.; Nielsen, M. H.; Chaput, K.; Schwalbach, E.; Shah, M. N.; Chapman, M. G.; Willey, T. M.; Rubenchik, A. M.; Anderson, A. T.; Wang, Y. M.; Matthews, M. J.; King, W. E. Controlling interdependent meso-nanosecond dynamics and defect generation in metal 3D printing. Science, 2020, 368, 660 – 665. DOI: 10.1126/science.aay7830

Calta, N. P.; Martin, A. A.; Hammons, J. A.; Nielsen, M. H.; Roehling, T. T.; Fezzaa, K.; Matthews, M. J.; Jefferies, J. R.; Willey, T. M.; Lee, J. R. I. Pressure dependence of laser-material interactions under laser powder bed fusion conditions probed by in situ X-ray imaging. Additive Manufacturing, 2020, 32, 101084 DOI: 10.1016/j.addma.2020.101084

Martin, A. A.; Calta, N. P.; Wang, J.; Depond, P. J.; Fong, A. Y.; Thampy, V.; Kiss, A. M.; Guss, G. M.; Stone, K. H.; Tassone, C. J.; Nelson Weker, J.; Toney, M. F.; Matthews, M. J.; Van Buuren, A. W. Dynamics of pore formation during laser powder bed fusion additive manufacturing. Nature Communications, 2019, 10, 1987. DOI: 10.1038/s41467-019-10009-2

Voisin, T.; Calta, N. P.; Khairallah, S. A.; Forien, J.-B..; Balogh, L.; Cunningham, R. W.; Rollett, A. D; Wang, Y. M. Defects-dictated tensile properties of selective laser melted Ti-6Al-4V. Materials and Design, 2018, 158, 113 – 126. DOI: 10.1016/j.matdes.2018.08.004

Calta, N. P.; Wang, J.; Kiss, A. M.; Martin, A. A.; Depond, P. J.; Guss, G. M.; Thampy, V.; Fong, A. Y.; Nelson Weker, J.; Stone, K. H.; Tassone, C. J.; Kramer, M. J.; Toney, M. F.; Van Buuren, A.; Matthews, M. J. An instrument for in situ time resolved X-ray imaging and diffraction of laser powder bed fusion additive manufacturing processes. Review of Scientific Instruments, 2018, 89, 055101. DOI: 10.1063/1.5017236

Calta, N. P.; Bud’ko, S. L.; Rodriguez, A. P.; Han, F.; Chung, D. Y.; Kanatzidis, M. G. Synthesis, Structure, and Complex Magnetism of MIr2In8 (M = Eu, Sr). Inorg. Chem. 2016, 55 (6), 3128–3135. DOI: 10.1021/acs.inorgchem.6b00059

Calta, N. P.; Im, J.; Rodriguez, A. P.; Fang, L.; Bugaris, D. E.; Chasapis, T. C.; Freeman, A. J.; Kanatzidis, M. G. Hybridization Gap and Dresselhaus Spin Splitting in EuIr4In2Ge4. Angew. Chem. Int. Ed. 2015, 54 (32), 9186–9191. DOI: 10.1002/anie.201504315

Physical and Life Sciences Directorate Award for Mentoring,  2023

Physical and Life Sciences Directorate Award for Diversity, Equity, and Inclusion, 2022

Director’s Award for Excellence in Publication 2021, 2020, 2018

Physical and Life Sciences Directorate Award for Excellence in Publication, 2020, 2019, 2018

Ludo Frevel Fellowship, International Centre for Diffraction Data, 2015