TY - JOUR

T1 - Turbine blade wear and damage – An overview of advanced characterization techniques

AU - Schlobohm, Jochen

AU - Bruchwald, Oliver

AU - Frackowiak, Wojciech

AU - Li, Yinan

AU - Kästner, Markus

AU - Pösch, Andreas

AU - Reimche, Wilfried

AU - Reithmeier, Eduard

AU - Maier, Hans Jürgen

N1 - Funding information: The authors thank the German Research Foundation (DFG) for the funding of this study within the Collaborate Research Center (SFB) 871 regeneration of complex capital goods, subprojects A1, A2 and C2.

PY - 2016/5

Y1 - 2016/5

N2 - This paper gives an overview of four measurement techniques that allow to extensively characterize the status of a worn turbine blade. In addition to the measurement of geometry and surface properties, the condition of the two protective coatings needs to be monitored. Fringe projection was used to detect and quantify geometric variances. The technique was improved using newly developed algorithms like inverse fringe projection. A Michelson interferometer was employed to further analyze areas with geometric defects and characterize the surface morphology of the blade. Pulsed high frequency induction thermography enabled the scanning of the blade for small cracks at or close to the surface. High frequency eddy current testing was used to determine the protective layers status and their thickness.

AB - This paper gives an overview of four measurement techniques that allow to extensively characterize the status of a worn turbine blade. In addition to the measurement of geometry and surface properties, the condition of the two protective coatings needs to be monitored. Fringe projection was used to detect and quantify geometric variances. The technique was improved using newly developed algorithms like inverse fringe projection. A Michelson interferometer was employed to further analyze areas with geometric defects and characterize the surface morphology of the blade. Pulsed high frequency induction thermography enabled the scanning of the blade for small cracks at or close to the surface. High frequency eddy current testing was used to determine the protective layers status and their thickness.

KW - Damage

KW - Eddy current

KW - Fringe projection

KW - Interferometer

KW - Thermography

KW - Turbine blade

KW - Wear

UR - http://www.scopus.com/inward/record.url?scp=85017470197&partnerID=8YFLogxK

U2 - 10.3139/120.110872

DO - 10.3139/120.110872

M3 - Article

AN - SCOPUS:85017470197

VL - 58

SP - 389

EP - 394

JO - Materialpruefung/Materials Testing

JF - Materialpruefung/Materials Testing

SN - 0025-5300

IS - 5

ER -