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Abstract

A series of creep tests at 973 K under constant stress condition were carried out to characterize the high temperature behaviour of 21Cr-11Ni-0.17N austenitic stainless steel. In addition, constant load and a variable stress creep test were performed. Microstructural observations on crept specimens showed the presence of intergranular and surface cracks. Constant stress creep curves were used to determine the material parameters of a viscoplastic constitutive model based on a backstress and continuum damage approach. The predictive capabilities were checked by its application to load controlled creep tests and a test with variable stresses. The description of constant stress or constant load creep conditions is fairly good. The model also satisfactorily describes sudden load changes.

Additional information

Authors: GARIBOLDI E, JRC Ispra (IT);SCHWERTEL J, JRC Ispra (IT);STAMM H, JRC Ispra (IT)
Bibliographic Reference: Paper presented: 11th European Conference on Fracture, Poitiers (FR), September 3-6, 1996
Availability: Available from (1) as Paper EN 39840 ORA
Record Number: 199610737 / Last updated on: 1996-08-06
Category: PUBLICATION
Original language: en
Available languages: en
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