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Improvements of methods for residual lifetime prediction are strongly correlated with a better detection of the actual state of damage in components. Different experimental methods, such as ultrasonic velocity measurements, metallographic determination of the A-parameters and hardness measurements, are applied after creep tests on a Mn-Cr austenitic steel. It is shown that for the type of creep damage observed, the ultrasonic method should have a high potential to detect the microstructural defect state. This is of particular relevance since ultrasonic testing is non-destructive.

Additional information

Authors: STAMM H, JRC Ispra (IT);GARIBOLDI E ET AL., JRC Ispra (IT);RIMOLDI P, TEMAV, Medicina (IT)
Bibliographic Reference: Paper presented: High Temperature Materials for Power Engineering 1990, Liège (BE), September 24-27, 1990
Availability: Available from (1) as Paper EN 35447 ORA
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