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Creep damage in an austenitic steel due to microcrack formation on grain boundary facets is considered. The metallographic examination is compared with non-destructive ultrasonic (US) velocity measurements. It is shown that both measurements can be related to a crack density parameter which also appears in the constitutive law for the creep strain rate.

Additional information

Authors: STAMM H, JRC Ispra (IT);VON ESTORFF U, JRC Ispra (IT)
Bibliographic Reference: Paper presented: 8th European Conference on Fracture - ECF8, Torino (IT), Oct. 1-5, 1990
Availability: Available from (1) as Paper EN 35520 ORA
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