SYMPOSIA PAPER Published: 01 January 2003
STP11439S

Acoustic Emission Analysis of Damage Accumulation During Thermal and Mechanical Loading of Coated Ni-Base Superalloys

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Acoustic emission (AE) allows for the in-situ monitoring of damage during the thermal and mechanical solicitation of a material and can be used to identify various damage mechanisms and interpret the way they interact, in particular, in multi-material systems. In the present work AE activity was monitored during the step-wise tensile testing and during the thermomechanical fatigue (TMF) of Ni-base superalloys (in single-crystalline and directionallysolidified form), coated with oxidation protection coatings. The classification analysis of the AE signals revealed that AE monitoring provides complementary and specific information about the surface-, subsurface-, and bulk damage processes. In combination with the mechanical response and the surface damage analysis by video imaging, it represents a powerful means for non-destructive damage assessment and it offers possibilities for the lifing of coated material systems.

Author Information

Vougiouklakis, Y
DG-Joint Research Centre, Institute for Energy, ZG Petten, The Netherlands
Hähner, P
DG-Joint Research Centre, Institute for Energy, ZG Petten, The Netherlands
de Haan, F
DG-Joint Research Centre, Institute for Energy, ZG Petten, The Netherlands
Stamos, V
DG-Joint Research Centre, Institute for Energy, ZG Petten, The Netherlands
Peteves, SD
DG-Joint Research Centre, Institute for Energy, ZG Petten, The Netherlands
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Details
Developed by Committee: E08
Pages: 255–269
DOI: 10.1520/STP11439S
ISBN-EB: 978-0-8031-5478-0
ISBN-13: 978-0-8031-3467-6