Abstract
Alumina-forming austenitic (AFA) steels represent a new class of corrosion- And creep-resistant austenitic steels designed to enable higher temperature recuperators. Field trials are in progress for commercially rolled foil with widths over 39 cm. The first trial completed 3,000 h in a microturbine recuperator with an elevated turbine inlet temperature and showed limited degradation. A longer microturbine trial is in progress. A third exposure in a larger turbine has passed 16,000 h. To reduce alloy cost and address foil fabrication issues with the initial AFA composition, several new AFA compositions are being evaluated in creep and laboratory oxidation testing at 650°- 800°C and the results compared to commercially fabricated AFA foil and conventional recuperator foil performance.
Original language | English |
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Title of host publication | Microturbines, Turbochargers and Small Turbomachines; Steam Turbines |
Publisher | American Society of Mechanical Engineers (ASME) |
ISBN (Electronic) | 9780791856796 |
DOIs | |
State | Published - 2015 |
Event | ASME Turbo Expo 2015: Turbine Technical Conference and Exposition, GT 2015 - Montreal, Canada Duration: Jun 15 2015 → Jun 19 2015 |
Publication series
Name | Proceedings of the ASME Turbo Expo |
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Volume | 8 |
Conference
Conference | ASME Turbo Expo 2015: Turbine Technical Conference and Exposition, GT 2015 |
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Country/Territory | Canada |
City | Montreal |
Period | 06/15/15 → 06/19/15 |
Bibliographical note
Publisher Copyright:Copyright © 2015 by ASME.