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Energy and Environment Directorate

Rob Seffens

Rob Seffens

Pacific Northwest National Laboratory
PO Box 999
Richland, WA 99352
(509) 375-2776

Biography

Born and raised in Tacoma, WA Rob Seffens attended Stadium High. After high school Rob attended Columbia Basin College in Pasco. Rob Seffens is a graduate of Washington State University Tri-Cities with a B.S. in Environment Science. Work areas of interest include: Material science research and development, residential construction and design, environmental study and regulation.

PNNL Patents

PNNL Publications

2024

  • Samanta A., A. Lall, H. Das, R.J. Seffens, G.J. Grant, and S. Jana. 2024. "Enhanced Toughness and Tear Resistance of Thin-walled High-Pressure Die-Cast Aluminum Alloys through Friction Stir Processing." Materials Letters 357. PNNL-SA-191954. doi:10.1016/j.matlet.2023.135752

2023

  • Balusu K., H. Das, X. Li, T.J. Roosendaal, R.J. Seffens, A. Soulami, and P. Upadhyay. 2023. "THE ROLE OF FRACTURE PROPERTIES ON LAP JOINT STRENGTH OF FRICTION STIR WELDED AA7055-T6 SHEETS." In TMS 2023: Friction Stir Welding and Processing XII Symposium held at the TMS Annual Meeting and Exhibition, March 19-23, 2023. San Diego, CA. Minerals, Metals and Materials Series, edited by Y. Hovanksi, et al, 193-205. Cham:Springer. PNNL-SA-178514. doi:10.1007/978-3-031-22661-8_18
  • Kuang W., B.W. Arey, A. Dohnalkova, L. Kovarik, B. Mills, N.C. Menon, and R.J. Seffens, et al. 2023. "Multi-Scale Imaging of High-Pressure Hydrogen induced Damage in EPDM Rubber Using X-ray Microcomputed Tomography, Helium-Ion Microscopy and Transmission Electron Microscopy." International Journal of Hydrogen Energy 48, no. 23:8573-8587. PNNL-SA-177303. doi:10.1016/j.ijhydene.2022.12.004
  • Niverty S., R. Kalsar, R.J. Seffens, A.D. Guzman, T.J. Roosendaal, L.E. Strange, and V.V. Joshi. 2023. "Probing corrosion using a simple and versatile in situ multimodal corrosion measurement system." Scientific Reports 13. PNNL-SA-185203. doi:10.1038/s41598-023-42249-0
  • Qiao Y., Y. Shin, M. Pallaka, E.K. Nickerson, D.R. Merkel, R.J. Seffens, and A. Ortiz, et al. 2023. "Plasma Surface Modification Coupled with Thermal and Step-over Distance Effects on Significant Fracture Improvement of Adhesively-bonded Metal-CFRTP Dissimilar Materials." Composites Science and Technology 232. PNNL-SA-174296. doi:10.1016/j.compscitech.2022.109833

2022

  • Qiao Y., D.R. Merkel, E.K. Nickerson, R.J. Seffens, Y. Shin, M. Pallaka, and J.L. Ramos, et al. 2022. "The Roles of Interface, Adherend, and Adhesive in Plasma- and Other-treated Joints of Metals and FRP Materials Under Shear Deformation." In Proceedings of the American Society for Composites - 37th Technical Conference, (ASC 2022), September 19-21, 2022, Tucson, AZ, edited by O. Zhupanska and E. Madenci. Lancaster, Pennsylvania:DEStech Publications, Inc. PNNL-SA-174097. doi:10.12783/asc37/36378
  • Qiao Y., D.R. Merkel, E.K. Nickerson, Y. Shin, R.J. Seffens, A. Ortiz, and K.L. Simmons. 2022. "Mode I Tensile Fracture Behavior of Adhesively-bonded Metal-Metal, Metal-CFRP, and CFRP-CFRP Bi-material Combinations Analyzed by Size Effect Method." Composites. Part A, Applied science and manufacturing 160. PNNL-SA-170430. doi:10.1016/j.compositesa.2022.107025
  • Samanta A., H. Das, D. Garcia, R.J. Seffens, T.J. Roosendaal, A.D. Guzman, and G.J. Grant, et al. 2022. "Microstructural modification of a high-pressure die-cast A380 alloy through friction stir processing and its effect on mechanical properties." In Light Metals Symposium held at the TMS Annual Meeting and Exhibition, February 27-March 3, 2022. Anaheim, CA. Minerals, Metals and Materials Series, edited by D. Eskin, 766 - 771. Cham:Springer. PNNL-SA-166425. doi:10.1007/978-3-030-92529-1_101
  • Samanta A., R.J. Seffens, H. Das, A.D. Guzman, T.J. Roosendaal, D. Garcia, and M. Song, et al. 2022. "Microstructure-refinement-driven enhanced tensile properties of high-pressure die-cast A380 alloy through friction stir processing." Journal of Manufacturing Processes 78. PNNL-SA-170274. doi:10.1016/j.jmapro.2022.04.027

2021

  • Frazier W.E., V.V. Joshi, N.R. Overman, M.A. Rhodes, T.J. Roosendaal, R.J. Seffens, and E.K. Nickerson, et al. 2021. Hot rolling of ZK60 magnesium sheet with isotropic tensile properties from tubing made by Shear Assisted Processing and Extrusion (ShAPE). PNNL-32477. Richland, WA: Pacific Northwest National Laboratory. Hot rolling of ZK60 magnesium sheet with isotropic tensile properties from tubing made by Shear Assisted Processing and Extrusion (ShAPE)
  • Merkel D.R., E.K. Nickerson, R.J. Seffens, K.L. Simmons, C.W. San Marchi, B.J. Kagay, and J.A. Ronevich. 2021. "Effect of hydrogen on tensile properties of 304L stainless steel at cryogenic temperatures." In Proceedings of the ASME Pressure Vessels & Piping Conference (PVP 2021), July 13-15, 2021, Virtual, Online, 4, Paper No: PVP2021-62436, V004T06A055. New York, New York:ASME. PNNL-SA-159130. doi:10.1115/PVP2021-62436

2009

  • Bruemmer S.M., M.B. Toloczko, M.J. Olszta, R.J. Seffens, and P.G. Efsing. 2009. "CHARACTERIZATION OF DEFECTS IN ALLOY 152, 52 AND 52M WELDS." In 14th International Conference on Environmental Degradation of Materials in Nuclear Power Systems, August 23-27, 2009, Virginia Beach, Virginia, 319-332. La Grange Park, Illinois:American Nuclear Society. PNNL-SA-67526.
  • Cumblidge S.E., S.R. Doctor, G.J. Schuster, R.V. Harris, S.L. Crawford, R.J. Seffens, and M.B. Toloczko, et al. 2009. "A Destructive Validation of NDE Responses of Service-Induced PWSCC Found in North Anna 2 Control Rod Drive Nozzle 31." In 7th International Conference on NDE in Relation to Structural Integrity for Nuclear and Pressurized Components. Tokyo:Japan Power Engineering and Inspection Corporation. PNNL-SA-66268.

2008

  • Cumblidge S.E., S.R. Doctor, G.J. Schuster, R. Harris, S.L. Crawford, R.J. Seffens, and M.B. Toloczko, et al. 2008. "NDE and DE of PWSCC Found in the J-Groove Weld of a Removed-From-Service Control Rod Drive Mechanism." In 6th International Conference on NDE in Relation to Structural Integrity for Nuclear and Pressurised Components, 723-733. Brussels:European Commission, Joint Research Centre. PNNL-SA-57354.

Energy and Environment

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