Oxide Growth Mechanism and Oxidation Resistance in Mechanically Alloyed Ni-20Cr-20Fe-5Nb-1Y2O3 Alloy

Il Ho Kim; S.I. Kwun

doi:10.4028/www.scientific.net/MSF.475-479.4231

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HomeMaterials Science ForumMaterials Science Forum Vols. 475-479Oxide Growth Mechanism and Oxidation Resistance in...

Oxide Growth Mechanism and Oxidation Resistance in Mechanically Alloyed Ni-20Cr-20Fe-5Nb-1Y₂O₃ Alloy

Abstract:

The oxidation characteristics of a Ni-20Cr-20Fe-5Nb-1Y2O3 alloy and a Ni-20Cr- 20Fe-5Nb alloy both with ultra-fine grains were compared with those of commercial Inconel 718 and PM1000 alloys. The oxidation resistance of the Ni-20Cr-20Fe-5Nb-1Y2O3 alloy was superior to that of both the Ni-20Cr-20Fe-5Nb and commercial Inconel 718 alloys. This was attributed to the suppression of successive oxidation via the oxide formed during the oxidation of the ODS (oxide dispersion strengthening) alloy. It was confirmed that the prior powder boundary is the site where the oxide grows continuously during ODS alloy oxidation.

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Materials Science Forum (Volumes 475-479)

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4231-4234

DOI:

https://doi.org/10.4028/www.scientific.net/MSF.475-479.4231

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Online since:

January 2005

Authors:

Il Ho Kim, S.I. Kwun

Keywords:

Mechanical Alloying (MA), ODS Alloy, Oxidation, Ultrafine Grained

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