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Experiments have been performed to investigate creep damage of a Mn-Cr austenitic steel (AMCR 0033). In this material, creep damage is caused by failure of grain boundary facets and the ensuing formation of microcracks. In an advanced stage of damage these microcracks start to interact and to coalesce, until creep rupture occurs. In this paper it is shown how statistical simulation can be used to gain an understanding of the mechanisms of creep damage and how NDT techniques can be related to the simulation. The basic ideas of the simulation procedure are outlined and it is demonstrated that simulation and experimental results show qualitative agreement, even though the damage models used are rather simple. More refined models for grain boundary failure may yield an even better agreement and possibly explain the sources of the scatter in the experimental data.

Additional information

Authors: RIESCH-OPPERMANN H, Institut für Plasmaphysik, Kernforschungsanlage Jülich GmbH, Jülich (DE);BRÜCKNER-FOIT A, Universität Karlsruhe, Institut für Zuverlässigkeit und Schadenskunde im Maschinenbau, Karlsruhe (DE);STAMM H, JRC Ispra (IT);BRUCKNER-FOIT A, Universitat Karlsruhe, Institut fur Zuverlassigkeit und Schadenskunde im Maschinenbau, Karlsruhe (DE)
Bibliographic Reference: Paper presented: 10th Congress on Material Testing, Budapest (HU), Oct. 7-11, 1991
Availability: Available from (1) as Paper EN 36364 ORA
Record Number: 199111205 / Last updated on: 1994-12-02
Original language: en
Available languages: en