Prediction of the Creep Behaviour of a 21Cr-11Ni-0.17N Steel Based on Constant Stress Creep Tests

A series of creep tests at 973 K under constant stress condition were carried out to characterise 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 continuous damagge approach. The predictive capabilities were checked by its application to load controlled creep tests and a test variable stresses. The description of constant stress or constant load creep conditions is fairly good. The model satisfactorily describes also suddedn load changes.

GARIBOLDI E.;  STAMM Hermann; 

1996-06-06

JRC13219

https://publications.jrc.ec.europa.eu/repository/handle/JRC13219,