Nathan Switzner

 

 "Friction Welding for Corrosion Resistant Cladding Applications"


Nathan’s research centers on quantifying and understanding the fundamental variables of the friction welding process—the temperature, stress, strain, and strain rate— that govern the formation of a bond between stainless steel cladding and the base metal, the microstructure evolution at the interface, and the final mechanical properties and corrosion resistance of the clad component. The project will demonstrate the feasibility of using the solid state rotary friction welding technique to apply CR cladding to low alloy steels with improved mechanical properties and corrosion-resistance in comparison to the conventional fusion cladding process, and use this principle to develop a new energy and cost efficient process, “rotational insertion friction welding” to apply CR metal internally to a billet. The friction welding of CR metal to the inner diameter of a billet is intended for proof-of-concept for future industrial pipe extrusion applications.


Degree Pursued:
Doctor of Philosophy in Metallurgical Engineering

Estimated Graduation Date:
May 2017

Bio:
After completing his metallurgical engineering BS at the Univ. of MO-Rolla, Nathan worked for Honeywell in Kansas City, MO for about ten years, focusing on forging and forming of stainless steels and other metals for aerospace and defense applications. Honeywell funded his master's degree with CSM and his thesis work, "Comparison of Warm Forging Processes for 304L Stainless Steel". Currently, Nathan is a full-time PhD student at CSM, sponsored by AWS (American Welding Society) to compare friction and fusion welding microstructures and mechanical properties for corrosion resistant cladding applications for the petroleum and chemical industries.

 

Contact Information:
Email:
nswitzne@mines.edu
Office: Hill Hall 208
LinkedIn URL:
https://www.linkedin.com/pub/nathan-switzner/47/4b0/b7b
Research Gate: https://www.researchgate.net/profile/Nt_Switzner/info

Publications:

  • N. Switzner, T. Neidt, J. Hollenbeck, J. Knutson, W. Everhart, R. Hanlin, D. Balch, and C. San Marchi, “Hydrogen-Assisted Fracture in Forged Type 304L Austenitic Stainless Steel”, International Hydrogen Conference 2012. Proceedings published by ASME Press in 2014.
  • W.A. Everhart, J.D. Lee, D.J. Broecker, J.P. Bartow, J.M. McQueen, N.T. Switzner, T.M. Neidt, T.A. Sisneros, and D.W. Brown, “Residual Stresses in 21-6-9 Steel Warm Forgings”, Report KCP-613-9282 available at osti.gov. Nov. 14, 2012.
  • N.T. Switzner, C.J. Van Tyne, and M.C. Mataya, “Effect of forging strain rate and deformation temperature on the mechanical properties of warm-worked 304L stainless steel”, Journal of Materials Processing Technology, Volume 210, Issue 8, 2010 pp 998-1007.
  • N.T. Switzner, C.J. Van Tyne, and M.C. Mataya, "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.
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