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Influence of TBC end geometry on the TMF life of an APS TBC
Linköping University, Department of Management and Engineering, Solid Mechanics. Linköping University, The Institute of Technology.
Siemens Industrial Turbomachinery, FINSPÅNG.
2010 (English)In: Procedia Engineering, ISSN 1877-7058, E-ISSN 1877-7058, Vol. 2, 1363-1371 p.Article in journal (Refereed) Published
Abstract [en]

A TBC subjected to TMF loading may spall off after a sufficiently large number of cycles. This is a consequence of a combination of general fatigue damage growth and strong internal stresses caused by oxidation in the bondcoat/topcoat interface. Further, at the ends of the coating there are stress singularities, at which early fatigue cracks tend to develop. This can, however, be avoided or delayed by making the coating end chamfered. This work investigates the influence of coating end chamfer on the fatigue life of an APS TBC.

Place, publisher, year, edition, pages
2010. Vol. 2, 1363-1371 p.
Keyword [en]
TBC, stress singularity, early spallation from end, end chamfering
National Category
Applied Mechanics
Identifiers
URN: urn:nbn:se:liu:diva-64275DOI: 10.1016/j.proeng.2010.03.148OAI: oai:DiVA.org:liu-64275DiVA: diva2:388671
Conference
10th International Fatigue Congress (Fatigue 2010), Praha, Czeck Republic, 2010
Available from: 2011-01-18 Created: 2011-01-18 Last updated: 2017-12-11

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Sjöström, Sören

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