Characterisation of creep deformation during slow strain rate tensile testing
2015 (English)Manuscript (preprint) (Other academic)
The strain-rate dependent deformation of the superalloy Haynes 282 during slow strain-rate tensile testing (SSRT) at 700 C has been investigated. The stress-strain response is remarkably well described by a simple constitutive model over a wide range of different strain-rates. The microstructure development is characterised and related to the influence of both strainrate dependent and independent deformation. Damage and cracking similar to what has been observed previously during conventional creep testing of Haynes 282 was found and explained. The model and the microstructure investigations show that the deformation and damage mechanisms during SSRT are essentially the same as under creep.
Place, publisher, year, edition, pages
Slow strain-rate tensile testing, Creep, Norton equation, Constitutive modelling, Cavity
IdentifiersURN: urn:nbn:se:liu:diva-122943OAI: oai:DiVA.org:liu-122943DiVA: diva2:875055