Long-term microturbine exposure of an advanced alloy for microturbine primary surface recuperators

Wendy J. Matthews, Karren L. More, Larry R. Walker

Research output: Chapter in Book/Report/Conference proceedingConference contributionpeer-review

6 Scopus citations

Abstract

Haynes Alloy HR-1201 forms a protective oxide scale when exposed to the harsh operating environment of a microturbine primary surface recuperator. Primary surface recuperators manufactured from HR-120 are currently in use on the Capstone C65 MicroTurbine2 . Long-term microturbine tests of this alloy are currently being conducted at an elevated turbine exit temperature (̃100F° higher than normal operation) at Capstone Turbine Corporation. Alloy samples that have been tested under steady-state microturbine operating conditions are removed after pre-determined exposure intervals for characterization by Capstone Turbine Corporation in collaboration with Oak Ridge National Laboratory. Such evaluations include characterization of surface oxide scales and the associated alloy compositional changes following steady-state operation ranging from 1,800 - 14,500 hours. Results from the microstructural and compositional analyses of these long-term, steady-state engine-tested HR-120 samples are used to illustrate the progression of alloy oxidation in the microturbine operating environment.

Original languageEnglish
Title of host publication2008 Proceedings of the ASME Turbo Expo
Subtitle of host publicationPower for Land, Sea, and Air
Pages579-586
Number of pages8
DOIs
StatePublished - 2008
Event2008 ASME Turbo Expo - Berlin, Germany
Duration: Jun 9 2008Jun 13 2008

Publication series

NameProceedings of the ASME Turbo Expo
Volume1

Conference

Conference2008 ASME Turbo Expo
Country/TerritoryGermany
CityBerlin
Period06/9/0806/13/08

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