Determination of local residual stress in an air plasma spray thermal barrier coating (APS-TBC) by microscale ring coring using a picosecond laser

Zhang, XunThe University of Manchester, Henry Moseley X-ray Imaging Facility, The Henry Royce Institute, School of Materials, M13 9PL, Manchester, United Kingdom (författare)

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
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

TEKNIK OCH TEKNOLOGIER Materialteknik Bearbetnings-, yt- och fogningsteknik hsv//swe
ENGINEERING AND TECHNOLOGY Materials Engineering Manufacturing, Surface and Joining Technology hsv//eng
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
Production Technology
Produktionsteknik
Manufacturing and materials engineering
Produktions- och materialteknik

Li, ChunState 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 (författare)
Withers, Philip J.The University of Manchester, Henry Moseley X-ray Imaging Facility, The Henry Royce Institute, School of Materials, M13 9PL, Manchester, United Kingdom (författare)
Markocsan, Nicolaie,1967-Högskolan Väst,Avdelningen för avverkande och additativa tillverkningsprocesser (AAT),PTW(Swepub:hv)tnm (författare)
Xiao, PingThe University of Manchester, School of Materials, M13 9PL, Manchester, United Kingdom (författare)
The University of Manchester, Henry Moseley X-ray Imaging Facility, The Henry Royce Institute, School of Materials, M13 9PL, Manchester, United KingdomState 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 (creator_code:org_t)

Av författaren/redakt...: Zhang, Xun; Li, Chun; Withers, Philip ...; Markocsan, Nicol ...; Xiao, Ping

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