Stress assisted oxidative failure of Inconel 601 for thermal energy storage

Madjid Sarvghad; Stuart Bell; Ralf Raud; Theodore A. Steinberg; Geoffrey Will

doi:10.1016/j.solmat.2016.10.008

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Stress assisted oxidative failure of Inconel 601 for thermal energy storage

Journal article

Open access

Peer reviewed

Stress assisted oxidative failure of Inconel 601 for thermal energy storage

Madjid Sarvghad, Stuart Bell, Ralf Raud, Theodore A. Steinberg and Geoffrey Will

Solar Energy Materials and Solar Cells, Vol.159, pp.510-517

2017

DOI: https://doi.org/10.1016/j.solmat.2016.10.008

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Abstract

nickel alloy

molten salt

transmission electron microscopy

EBSD

oxidation

stress corrosion cracking

Degradation of an Inconel 601 superalloy subjected to a eutectic mixture of carbonate salt at 450 degrees C was studied using advanced microscopy and microanalysis techniques. On the outside of the vessel, long term exposure to elevated temperature led to intergranular stress corrosion cracking via a stress assisted oxidation process. Elemental analysis verified diffusion controlled de-alloying of Ni and Cr from grain boundaries. Transmission electron microscopy showed that a (CrFeNiAl)(3)O-4 oxide phase was formed at grain boundaries as a result of oxygen penetration. Intergranular cracking appeared due to the presence of residual stresses and micro structural heterogeneities facilitated the crack branching.

Details

Title: Stress assisted oxidative failure of Inconel 601 for thermal energy storage
Authors: Madjid Sarvghad (Corresponding Author) - Queensland University of Technology
Stuart Bell (Author) - Queensland University of Technology
Ralf Raud (Author) - Queensland University of Technology
Theodore A. Steinberg (Author) - Queensland University of Technology
Geoffrey Will (Author) - Queensland University of Technology
Publication details: Solar Energy Materials and Solar Cells, Vol.159, pp.510-517
Publisher: Elsevier BV, North-Holland
Date published: 2017
DOI: 10.1016/j.solmat.2016.10.008
ISSN: 1879-3398; 0927-0248
Grant note: Australian Solar Thermal Research Initiative (ASTRI) Australian Government via Australian Renewable Energy Agency (ARENA); Australian Renewable Energy Agency (ARENA) Science and Engineering Faculty, QUT
Organisation Unit: School of Science, Technology and Engineering
Language: English
Record Identifier: 99737994302621
Output Type: Journal article

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