Welding of dissimilar alloys for high temperature heat exchangers for SOFC

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Reduction in the cost of balance of plant applications is one of the top priority focus areas for the successful implementation of solid oxide fuel cell technology. High temperature heat exchangers are employed to heat cathode air utilizing either hot gases coming from the anode side of the stack or other hot gases generated by external processes. In order to reduce the cost of heat exchangers, it may be necessary to apply several different materials, each in a different temperature zone, for the construction of the heat exchanger. This technique would require the joining of dissimilar materials in the construction. ... continued below

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Wilson, R.D.; Hatem, J.; Dogan, O.N. & King, P.E. October 1, 2006.

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Reduction in the cost of balance of plant applications is one of the top priority focus areas for the successful implementation of solid oxide fuel cell technology. High temperature heat exchangers are employed to heat cathode air utilizing either hot gases coming from the anode side of the stack or other hot gases generated by external processes. In order to reduce the cost of heat exchangers, it may be necessary to apply several different materials, each in a different temperature zone, for the construction of the heat exchanger. This technique would require the joining of dissimilar materials in the construction. In this work, welding of commercial candidate dissimilar materials is explored. Filler materials were identified using equilibrium phase diagrams and thermodynamic simulation software. Autogenous welding was performed and the welding defects were characterized. Finally, experimental weld microstructures were compared to phases predicted by the simulations.

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Not published - PDF of slide presentation is attached

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  • Materials Science & Technology (MS&T06), Cincinnati OH, Oct. 15-19, 2006

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  • Report No.: DOE/NETL-IR-2007-219
  • Grant Number: None cited
  • Office of Scientific & Technical Information Report Number: 913315
  • Archival Resource Key: ark:/67531/metadc887478

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  • October 1, 2006

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  • Sept. 22, 2016, 2:13 a.m.

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  • Nov. 4, 2016, 2:12 p.m.

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Wilson, R.D.; Hatem, J.; Dogan, O.N. & King, P.E. Welding of dissimilar alloys for high temperature heat exchangers for SOFC, article, October 1, 2006; Pittsburgh, Pennsylvania. (digital.library.unt.edu/ark:/67531/metadc887478/: accessed September 20, 2018), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.