High temperature isothermal oxidation behaviour of an oxide dispersion strengthened derivative of IN625

Arnold, K, Tatlock, G, Kenel, C, Colella, A and Matteazzi, P (2018) High temperature isothermal oxidation behaviour of an oxide dispersion strengthened derivative of IN625. Materials at High Temperatures, 35 (1-3). pp. 141-150.

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Abstract

Gas atomised IN625 powder was mechanically alloyed with <1·0 Wt.% nano-yttria and consolidated by spark plasma sintering (SPS) to produce an oxide dispersion strengthened (ODS) alloy. The isothermal oxidation rate constant of the ODS alloy, and wrought IN625, was determined by thermogravimetric analysis. This was performed at 900 °C in static laboratory air for exposure times of up to 1000 h. It was found that the ODS alloy oxidised ~40x slower than wrought IN625, which is attributed to the reactive element effect. It is further proposed that the improvement in oxidation resistance of the ODS alloy, and the superior morphology of the oxide scale formed on the ODS alloy, may be related to the presence of Nb carbide, rather than δ-phase, in the ODS alloy.

Item Type:	Article
Additional Information:	peerreview_statement: The publishing and review policy for this title is described in its Aims & Scope. aims_and_scope_url: http://www.tandfonline.com/action/journalInformation?show=aimsScope&journalCode=ymht20
Uncontrolled Keywords:	oxide dispersion strengthened (ODS) alloys, Ni-based superalloy, reactive element effect
Depositing User:	Symplectic Admin
Date Deposited:	15 Nov 2017 13:15
Last Modified:	19 Jan 2023 06:50
DOI:	10.1080/09603409.2017.1393145
Related URLs:	Author Publisher
URI:	https://livrepository.liverpool.ac.uk/id/eprint/3012223