Publications

• Switzner, N. (2025). R Shiny App for ABET Course Assessment & Student Learning Outcomes (1.0). Zenodo. https://doi.org/10.5281/zenodo.14785084
• Martin, P., Switzner, N., Oneal, O., Curiel, S., Veloo, P., “Prediction of Yield Strength from Chemistry and Grain Size Using Historical Models,” Pipeline Pigging and Integrity Management (PPIM) Conference, January 27-31, 2025.
• Switzner, N., Anderson, J., Martin, P., Ahmed, L., Veloo, P., “Estimating Fracture Toughness for Pipeline Steel from Charpy V-Notch Data using the API-579 Master Curve Method,” SaudiMET Conference, Grand Hyatt Hotel, AlKhobar, Saudi Arabia, October 29, 2024.
• Switzner, N., AlWaeli, A.H., “Experiential Learning Approaches for Undergraduate Mechanical Engineering Courses,” SaudiMET Conference, Grand Hyatt Hotel, AlKhobar, Saudi Arabia, October 30, 2024.
• Switzner, N., Anderson, J., Martin, P., Amend, B., “What Are My Options? A Review of Nondestructive Mechanical Tests for Steel Linepipe Yield Strength,” International Pipeline Conference, ASME, 2024.
• Martin, P., Switzner, N., Anderson, J., Stuckner, J., Oneal, O., Veloo, P., “A Machine Learning Model to Automate Quantitative Evaluation of Line Pipe Microstructures.” Pipeline Pigging and Integrity Management (PPIM) Conference, February 12-16, 2024
• Emily Brady, Melissa Gould, Jeffrey Kornuta, Nathan Switzner, Peter Veloo, “A Historical Review and Analysis of the Effect of Tensile Test Sample Orientation on Pipeline Yield Strength”, Conference: Pipeline Research Council International (PRCI) Research Exchange 2023.
• Scales, M; Kornuta, JA; Switzner, N; Veloo, P, “Automated Calculation of Strain Hardening Parameters from Tensile Stress vs. Strain Data for Low Carbon Steel Exhibiting Yield Point Elongation”, Experimental Techniques, Springer, 2023.
• Switzner, Nathaniel T; Anderson, Joel; Ahmed, Lanya Ali; Rosenfeld, Michael; Veloo, Peter, “Algorithms to Estimate the Ductile to Brittle Transition Temperature, Upper Shelf Energy, and Their Uncertainties for Steel Using Charpy V-Notch Shear Area and Absorbed Energy Data”, Metals, MDPI, 2023
• Martin, Peter; Kornuta, Jeffrey; Brady, Emily; Switzner, Nathan; Gibbs, Jon; Veloo, Peter, “Variability and Mitigative Measures for Estimating Yield Strength in Line Pipe by Instrumented Indentation Testing” (PPIM PAPER No. 2023.28:38), Pipeline Pigging and Integrity Management (PPIM) Conference, 2023.
• Anderson, Joel; Switzner, Nathaniel; Martin, L.P.; Rosenfeld, Michael; Ali, Lanya; Patrick, Brian; Veloo, Peter, “Automated Methods to Estimate Transition Temperature, Upper Shelf Energy, and Uncertainty from Charpy V-Notch Data (PPIM PAPER No. 2023.48:69) Pipeline Pigging and Integrity Management (PPIM) Conference, 2023.
• Martin, LP; Thorsson, S; Kornuta, J; Switzner, N; Veloo, P, “Limitations in the use of the Hollomon Power Law to estimate yield strength from instrumented indentation testing of line pipe steel,” Pending, 2023.
• Martin, LP; Switzner, Nathan; Oneal, Owen; Curiel, Sophia; Anderson, Joel; Veloo, Peter, “Quantitative evaluation of microstructure to support verification of material properties in line-pipe steels”, International Pipeline Conference, ASME, 2022.
• Anderson, Joel; Switzner, Nathan; Kornuta, Jeffrey; Veloo, Peter, “Incorporating Measurement Uncertainty Into Machine Learning-Based Grade Predictions”, International Pipeline Conference, ASME, 2022.
• Scales, Martin; Anderson, Joel; Kornuta, Jeffrey A; Switzner, Nathan; Gonzalez, Ramon; Veloo, Peter; “Accurate estimation of yield strength and ultimate tensile strength through instrumented indentation testing and chemical composition testing”, Materials, MDPI, 2022.
• Maragh, J.; Liu, Chelsea; Martin, P.; Switzner, N.; Gibbs, J.; Kornuta, J.; Veloo, P., “Reducing Bias in Chemical Composition Data with Measurements Below the Limit of Detection” (paper #20), Pipeline Pigging and Integrity Management (PPIM) Conference, 2022.
• Gibbs, J.; Oneal, O.; Veloo, P.; Kornuta, J.; Switzner, N. “Using Nondestructive Testing and Statistical Analysis to Perform Material Property Verification and Align Records” (paper #6), Pipeline Pigging and Integrity Management (PPIM) Conference, 2022.
• Anderson, J.; Gibbs, J.; Oneal, O.; Kornuta, J.; Switzner, N.; Veloo, P., “Using Monte Carlo Simulations to Incorporate Measurement Uncertainty into Grade Predictions” (paper #29), Pipeline Pigging and Integrity Management (PPIM) Conference, 2022.
• Rosenfeld, M.J.; Anderson, J.; Switzner, N.; Steiner, A.; Veloo, P., “Considerations for Applying §192.712 When You Have No Toughness Data” Elevara Pipeline Fracture Toughness Forum, Houston, July, 2021.
• Gould, M., Amend. B., Veloo, P., Oneal, O., Gonzales, R., Switzner, N., “The role of in-situ metallography in pipeline integrity management,” Pipeline Pigging and Integrity Management (PPIM), Paper #51, Houston, TX, February 22-26, 2021.
• Cohn, A., Kornuta, J., Switzner, N., Gibbs, J., Gonzalez, R., Veloo, P., “Current approaches and remaining challenges in using ultrasonic contact impedance technology to characterize pipe hardness and predict tensile strength,” Pipeline Pigging and Integrity Management (PPIM), Paper #55, Houston, TX, February 22-26, 2021.
• Gibbs, J., Switzner, N., Kornuta, J., Gonzalez, R., Rosenfeld, M., Veloo, P., “Comparison of in-situ material verification non-destructive testing to laboratory destructive testing of lap-welded pipe,” Pipeline Pigging and Integrity Management (PPIM), Paper #56, Houston, TX, February 22-26, 2021.
• Switzner, N., Anderson, J., Rosenfeld, Veloo, P., Gibbs, J., Gonzalez, R., “Assessing steel pipe toughness using chemical composition and microstructure,” Pipeline Pigging and Integrity Management (PPIM), Paper #57, Houston, TX, February 22-26, 2021. 
• Switzner, N., Veloo, P., Rosenfeld, M., Rovella, T., Gibbs, J., “An approach to establishing manufacturing process and vintage of line pipe using in-situ nondestructive examination and historical manufacturing data,” International Pipeline Conference (IPC 2020), Calgary, Canada, September 28-October 2, 2020. Proceedings from: American Society of Mechanical Engineers (ASME). 
• Switzner, N., Liong, M., Veloo, P., Gould, M., Rovella, T., “Influence of line pipe steel microstructure on NDE yield strength predictive capabilities,” Pipeline Pigging and Integrity Management (PPIM), Paper #66, Houston, TX, February 19-21, 2020. 
• Switzner, N., Liong, M., Veloo, P., Gould, M., Rovella, T., “Nondestructive Testing of Pipeline Materials: Further Evaluation of Portable OES, XRF, LIBS, and Filings to Estimate Chemical Composition,” Pipeline Pigging and Integrity Management (PPIM), Paper #67, Houston, TX, February 19-21, 2020. 
• Switzner, N., N Switzner, P Veloo, B Amend, M Gould, M Rosenfeld, J Ma, T Rovella, “A Methodology to Determine the Grade for a Vintage Gas Transmission Pipe,” AISTech, Pittsburgh, PA, May 7, 2019. 
• Louie, M., Switzner, N., Veloo, P., Amend, B., Liong, M., Gould, M., Rovella, T., Martin, P., “Nondestructive Testing of Pipeline Materials: Analysis of Chemical Composition from Metal Filings” Pipeline Pigging and Integrity Management (PPIM), Paper #50, Houston, TX, February 20-22, 2019. 
• Switzner, N., Yu, Z., “Austenitic Stainless Steel Cladding Interface Microstructures Evaluated for Petrochemical Applications,” Welding Journal, Vol. 98 (2), 2019, pp S50-S61. https://s3.amazonaws.com/WJ-www.aws.org/supplement/2019.98.004.pdf
• Switzner, N.T., Sawyer, E.T., Everhart, W.A., Hanlin, R.L., “Predicting microstructure and strength for AISI 304L stainless steel forgings,” Materials Science and Engineering: A, Vol. 745, 2019, pp 474-483. https://doi.org/10.1016/j.msea.2018.12.054
• Switzner, N., Yu, Z., Eff, M., Lienert, T., Fonseca, A., “Microstructure and mechanical property variations within inertia friction welded joints of stainless steel to steel.” The International Journal of Advanced Manufacturing Technology, Vol. 95 (9-12), 2018, pp 4327-4340. https://doi.org/10.1007/s00170-017-1568-3
• Switzner, N., Queiroz, H., Duerst, J., Yu, Z., “Si-bronze to 304 stainless steel GTA weld fusion zone microstructure and mechanical properties,” Materials Science and Engineering: A, Vol. 709, 2018, pp 55-64. https://doi.org/10.1016/j.msea.2017.09.025
• Morgan, M.J., Switzner, N.T., San Marchi, C.W., Balch, D.K., “Forging strain rate and deformation temperature effects on the fracture toughness properties of type 304L stainless steel precharged with tritium.” Report SAND2017-5637C. Sandia National Lab. (SNL-NM), Albuquerque, NM, 2017. (available at osti.gov). https://doi.org/10.1115/1.861387_ch18
• Switzner, N., Friction welding for cladding applications: processing, microstructure and mechanical properties of inertia friction welds of stainless steel to low carbon steel and evaluation of wrought and welded austenitic stainless steels for cladding applications in acid-chloride service. (PhD Dissertation) George S. Ansel Department of Metallurgical and Materials Engineering, Colorado School of Mines. 2017. 
• Reynolds, T.B., Everhart, W.A., Switzner, N.T., Balch, D.K., San Marchi, C.W., “High-energy rate forgings of wedges: characterization of processing conditions.” Report SAND2014-4272. Sandia National Lab. (SNL-CA), Livermore, CA, 2014. (available at osti.gov) https://prod-ng.sandia.gov/techlib-noauth/access-control.cgi/2014/144272.pdf
• Everhart, W.A., Lee, J.D., Broecker, D.J., Bartow, J.P., McQueen, J.M., Switzner, N.T., Neidt, T.M., Sisneros, T.A., Brown, D.W., “Residual Stresses in 21-6-9 Steel Warm Forgings.” Report KCP-613-9282. Kansas City Plant (KCP), Kansas City, MO, 2012. (available at osti.gov) https://www.osti.gov/biblio/1150755-residual-stresses-stainless-steel-warm-forgings
• Switzner, N., Neidt, T., Hollenbeck, J., Kuntson, J., Everhart, W., Hanlin, R., Balch, R., San Marchi, C., “Hydrogen-Assisted Fracture in Forged Type 304L Austenitic Stainless Steel,” International Hydrogen Conference 2012. Proceedings published by ASME Press in 2014. https://doi.org/10.1115/1.860298_ch29
• Switzner, N.T., “Stainless steel microstructure and mechanical properties evaluation for spinformed plates.” Report KCP-613-8779. Kansas City Plant (KCP), Kansas City, MO, 2010. (available at osti.gov). https://www.osti.gov/servlets/purl/1129927
• Switzner, N.T., Van Tyne, C.J., Mataya, M.C., “Effect of forging strain rate and deformation temperature on the mechanical properties of warm-worked 304L stainless steel,” Journal of Materials Processing Technology, Vol. 210, No. 8, 2010, pp 998-1007. https://doi.org/10.1016/j.jmatprotec.2010.01.014
• Switzner, N.T., “Spin-forming Project Report.” Report KCP-613-8550. Kansas City Plant (KCP), Kansas City, MO, 2009. (available at osti.gov). https://www.osti.gov/biblio/952564/
• Switzner, N.T., Comparison of Forging Processes for 304L Stainless Steel. (Masters Thesis). George S. Ansel Department of Metallurgical and Materials Engineering, Colorado School of Mines.2007. https://www.researchgate.net/publication/34177989_Comparison_of_forging_processes_for_304L_stainless_steel
• Switzner, N.T., Van Tyne, C.J., Mataya, M.C., “Hydraulic Press, Mechanical Press, Screw Press, or HERF: A Comparison of 304L Forging Processes,” Proceedings of the 27th Forging Industry Technical Conference and Energy Summit, March 27-29, 2007, Fort Worth, Texas.