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Determination of local residual stress in an air plasma spray thermal barrier coating (APS-TBC) by microscale ring coring using a picosecond laser
The University of Manchester, Henry Moseley X-ray Imaging Facility, The Henry Royce Institute, School of Materials, M13 9PL, Manchester, United Kingdom.
State Key Laboratory of Advanced Welding and Joining, Harbin Institute of Technology, Harbin, 150001, China; The University of Manchester, School of Materials, M13 9PL, Manchester, United Kingdom.
The University of Manchester, Henry Moseley X-ray Imaging Facility, The Henry Royce Institute, School of Materials, M13 9PL, Manchester, United Kingdom.
University West, Department of Engineering Science, Division of Subtractive and Additive Manufacturing. (PTW)ORCID iD: 0000-0002-9578-4076
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2019 (English)In: Scripta Materialia, ISSN 1359-6462, E-ISSN 1872-8456, Vol. 167, p. 126-130Article in journal (Refereed) Published
Abstract [en]

A picosecond laser for incremental annular trench cutting is combined with digital image correlation (DIC) to extend the incremental ring-core method to the profiling of residual stress in thick (>100 μm) coatings. In this case the local residual stress in a TBC is depth profiled after exposure to 1150 °C for 190 h. The topcoat was found to be in compression with an average compressive stress of −94 ± 8 MPa which is representative of the stresses that would be generated elastically on cooling from a stress-free temperature of ~970 °C. The stress profile measurements have been validated by high-energy synchrotron X-ray diffraction measurements. © 2019

Place, publisher, year, edition, pages
2019. Vol. 167, p. 126-130
Keywords [en]
Computerized tomography; Picosecond lasers; Plasma spraying; Residual stresses; Stress analysis; Thermal barrier coatings; Yttria stabilized zirconia; Yttrium oxide; Zirconia, Air plasma spray; D. digital image correlation (DIC); High-energy synchrotron X-rays; Hole drilling; Non destructive; Stress-free temperature; X ray micro-computed tomography; Yttria partially stabilized zirconia, Compressive stress
National Category
Manufacturing, Surface and Joining Technology
Research subject
Production Technology
Identifiers
URN: urn:nbn:se:hv:diva-13850DOI: 10.1016/j.scriptamat.2019.03.036ISI: 000468720000026Scopus ID: 2-s2.0-85064181710OAI: oai:DiVA.org:hv-13850DiVA, id: diva2:1317882
Funder
EU, European Research Council, No. 695638 CORREL-CT.
Note

Funders: Engineering and Physical Science Research Council, (EPSRC), EP/P025021/1, EP/F007906/1 , EP/F001452/1 , EP/I02249X , EP/M010619/1 , EP/F028431/1 , and EP/M022498/1

Available from: 2019-05-24 Created: 2019-05-24 Last updated: 2019-07-25Bibliographically approved

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Markocsan, Nicolaie

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