Isothermal and Cyclic Oxidation of Haynes 282 Processed by Electron Beam Melting (EBM) and Laser Powder Bed Fusion (LPBF) in Dry Air at 800 and 950∘C

M. Romedenne; P. Stack; R. Pillai; S. Dryepondt

doi:10.1007/s11837-022-05201-7

Isothermal and Cyclic Oxidation of Haynes 282 Processed by Electron Beam Melting (EBM) and Laser Powder Bed Fusion (LPBF) in Dry Air at 800 and 950^∘C

M. Romedenne, P. Stack, R. Pillai, S. Dryepondt

Corrosion Science & Technology

Research output: Contribution to journal › Article › peer-review

4 Scopus citations

Abstract

The isothermal and cyclic oxidation behavior of Haynes 282 (H282) processed by laser powder bed fusion and electron beam melting was compared to its cast counterpart during exposures in air at 800 and 950∘C. The specific microstructure of the AM alloys compared to coarse-grain cast 282 resulted in differences in oxidation rates, internal oxidation and spallation behavior. At 800∘C, faster Ti diffusion to the surface due to the smaller grain size of the AM alloys led to Ti doping of the Cr ₂O ₃ scale and faster oxidation rates. The higher density of grain boundaries also resulted in more pronounced internal oxidation. At 950∘C, a duplex Cr ₂O ₃ scale was observed with a dense inner layer and porous cracked outer layer with embedded TiO ₂ particles. The impact of the external and internal oxide compositions and oxidation-induced elemental depletions on the oxidation lifetime, creep properties and spallation behavior is discussed.

Original language	English
Journal	JOM
DOIs	https://doi.org/10.1007/s11837-022-05201-7
State	Accepted/In press - 2022

Funding

The authors thank G. Garner, J. Wade, B. Johnston, T. Lowe, T. Jordan, V. Cox and C. O’Dell for the assistance with the experimental work and X. Chen at ORNL and Anand Kulkani at Siemens Corporation for providing us with the cast and LPBF H282 alloys, respectively. K. Kane, C. Parker and B.A. Pint are kindly acknowledged for their comments on the manuscript. The authors declare that they have no conflict of interest. Research was sponsored by the US Department of Energy, Office of Energy Efficiency and Renewable Energy, Advanced Manufacturing Office, and Office of Fossil Energy, Crosscutting Research Program, under contract DE-AC05-00OR22725 with UT-Battelle LLC.

Funders	Funder number
U.S. Department of Energy
Advanced Manufacturing Office
Office of Fossil Energy	DE-AC05-00OR22725
Office of Energy Efficiency and Renewable Energy
UT-Battelle

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10.1007/s11837-022-05201-7

Cite this

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title = "Isothermal and Cyclic Oxidation of Haynes 282 Processed by Electron Beam Melting (EBM) and Laser Powder Bed Fusion (LPBF) in Dry Air at 800 and 950∘C",

abstract = "The isothermal and cyclic oxidation behavior of Haynes 282 (H282) processed by laser powder bed fusion and electron beam melting was compared to its cast counterpart during exposures in air at 800 and 950∘C. The specific microstructure of the AM alloys compared to coarse-grain cast 282 resulted in differences in oxidation rates, internal oxidation and spallation behavior. At 800∘C, faster Ti diffusion to the surface due to the smaller grain size of the AM alloys led to Ti doping of the Cr 2O 3 scale and faster oxidation rates. The higher density of grain boundaries also resulted in more pronounced internal oxidation. At 950∘C, a duplex Cr 2O 3 scale was observed with a dense inner layer and porous cracked outer layer with embedded TiO 2 particles. The impact of the external and internal oxide compositions and oxidation-induced elemental depletions on the oxidation lifetime, creep properties and spallation behavior is discussed.",

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AU - Pillai, R.

AU - Dryepondt, S.

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AB - The isothermal and cyclic oxidation behavior of Haynes 282 (H282) processed by laser powder bed fusion and electron beam melting was compared to its cast counterpart during exposures in air at 800 and 950∘C. The specific microstructure of the AM alloys compared to coarse-grain cast 282 resulted in differences in oxidation rates, internal oxidation and spallation behavior. At 800∘C, faster Ti diffusion to the surface due to the smaller grain size of the AM alloys led to Ti doping of the Cr 2O 3 scale and faster oxidation rates. The higher density of grain boundaries also resulted in more pronounced internal oxidation. At 950∘C, a duplex Cr 2O 3 scale was observed with a dense inner layer and porous cracked outer layer with embedded TiO 2 particles. The impact of the external and internal oxide compositions and oxidation-induced elemental depletions on the oxidation lifetime, creep properties and spallation behavior is discussed.

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