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carburization reactions

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Proceedings Papers

AM-EPRI2016, Advances in Materials Technology for Fossil Power Plants: Proceedings from the Eighth International Conference, 888-899, October 11–14, 2016,
... carburisation. Results are discussed with reference to alloy chromium diffusion and carbon permeation of oxide scales. carbide precipitation carbon permeation carburization reactions chromium diffusion corrosion iron-rich oxide scale nickel-base alloys stainless steel supercritical CO 2...
Proceedings Papers

AM-EPRI2013, Advances in Materials Technology for Fossil Power Plants: Proceedings from the Seventh International Conference, 881-891, October 22–25, 2013,
... the deposit) and under the deposit. Carbonate based deposits and different corrosion reactions on alloy surface have an effect on carburization due to change of local CO2 pressure and carbon activity at deposit alloy interface [5]. Corrosion reactions occurring at material surface may change the nature...
Proceedings Papers

AM-EPRI2013, Advances in Materials Technology for Fossil Power Plants: Proceedings from the Seventh International Conference, 1417-1421, October 22–25, 2013,
... [1]. In our previous study, Fe-9Cr-1Mo steel showed good oxidation resistance with formation of protective Cr2O3 scale in air, but it was heavily oxidized in CO2 by formation of thick Fe-rich oxide scale with internal Cr-carburization at 700°C [2]. The higher oxidation mass gain in CO2 was considered...
Proceedings Papers

AM-EPRI2010, Advances in Materials Technology for Fossil Power Plants: Proceedings from the Sixth International Conference, 312-324, August 31–September 3, 2010,
... concern that oxidation in environments with elevated CO2 levels could result in carburization of the alloy. For example, ferritic steels exposed to this same environment have shown much greater mass gains than in environments containing air, moist air, steam, or Ar with CO2 (3). A possible mechanism...
Proceedings Papers

AM-EPRI2024, Advances in Materials, Manufacturing, and Repair for Power Plants: Proceedings from the Tenth International Conference, 885-896, October 15–18, 2024,
...- 0.25%H 2 O impurities at 300 bar increased the reaction rates ≥2X at 750°C. At lower temperatures, steels are susceptible to C ingress and embrittlement. Creep-strength enhanced ferritic steels may be limited to <550°C and conventional stainless steels to <600°C. Two strategies to increase those...
Proceedings Papers

AM-EPRI2019, 2019 Joint EPRI – 123HiMAT International Conference on Advances in High-Temperature Materials, 953-966, October 21–24, 2019,
... and extent of attack. The results clearly demonstrated the effects of alloy composition and environment on the long-term cyclic oxidation resistance. The extents of attack varied from alloy to alloy but none of the alloys underwent catastrophic corrosion and no significant internal carburization was observed...
Proceedings Papers

AM-EPRI2019, 2019 Joint EPRI – 123HiMAT International Conference on Advances in High-Temperature Materials, 1004-1013, October 21–24, 2019,
..., all specimens were ultrasonically cleaned in alcohol prior to reaction. Isothermal corrosion experiments were carried out in a vertical furnace. Two reaction temperatures were used: 650 C for Fe-20Cr-(Si, or Mn) alloys, and 700 C for Ni-20Cr-(Si) alloys. All alloys were reacted in both Ar-20CO2 and Ar...
Proceedings Papers

AM-EPRI2016, Advances in Materials Technology for Fossil Power Plants: Proceedings from the Eighth International Conference, 844-854, October 11–14, 2016,
...-forming alloys, indicate that modifications in the environment did not strongly affect the reaction products at 700°-800°C. alumina-forming alloys commercial chromia-forming alloys Fe- structural alloys impurities Ni-base structural alloys supercritical CO 2 compatibility Advances...
Proceedings Papers

AM-EPRI2024, Advances in Materials, Manufacturing, and Repair for Power Plants: Proceedings from the Tenth International Conference, 723-734, October 15–18, 2024,
... flue gases, and inner diameter (ID) carburization from process fluids. As a result, cracking often occurs along large solidification grain boundaries from interconnected networks of carbides and secondary phases. To address these degradation concerns, Wire Arc Additive Manufacturing (WAAM) is being...