Payne, Shirley and McIntyre, P.
(1988).
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Abstract
The influence of grain boundary microstructure on the susceptibility of thermally treated (TT) Inconel Alloy 600 to intergranular attack (IGA) and stress corrosion cracking (SCC) in 30%NaOH plus 10% Na2SO4 at 350ºC was investigated. Both mill-annealed (MA) and laboratory solution-annealed alloys were aged at 700 C to establish the effect of intitial processing on the response to thermal treatment. Treatments of 1 h or more at 700ºC improved the SCC resistance of solution-annealed material but did not improve the performance of MA material containing a high density of intraganular carbides. The poor behavior after thermal treatment is associated with the formation of small M23C6 carbides growing at a high angle to the boundaries and the development into cellular colonies. This is attributed to the use of a MA temperature that was too low to take into solution sufficient carbon for the development of semicontinuous grain boundary carbides during the subsequent TT process.
| Item Type: | Journal Item | ||||||
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| Copyright Holders: | 2004 Elsevier B. V. | ||||||
| ISSN: | 0010-9312 | ||||||
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| Keywords: | corrosion; stress corrosion cracking; heat treatment; annealing; nickel metallography; grain boundaries; Inconel 600; intergranular attack; precipitation; sodium hydroxide; sodium sulfate; nickel chromium iron alloys | ||||||
| Academic Unit/School: | Faculty of Science, Technology, Engineering and Mathematics (STEM) | ||||||
| Item ID: | 24266 | ||||||
| Depositing User: | Shirley Northover | ||||||
| Date Deposited: | 16 Mar 2011 16:14 | ||||||
| Last Modified: | 29 Nov 2016 10:08 | ||||||
| URI: | http://oro.open.ac.uk/id/eprint/24266 | ||||||
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