Deformation and damage behaviours of austenitic alloys in the dynamic strain ageing regime
(English)Manuscript (preprint) (Other academic)
Deformation and damage behaviours influenced by dynamic strain ageing (DSA) in three austenitic stainless steels and two nickel-base alloys have been investigated using tensile tests at elevated temperatures. The deformation and damage behaviours have been analysed using electron channeling contrast imaging and electron backscatter diffraction. The results from this study show that DSA not always reduce ductility, in fact for some materials the ductility can increase in the DSA regime. This is attributed to the formation of nano twins by DSA stimulated twinning induced plasticity. Damage mechanisms due to DSA were also investigated and discussed.
Dynamic strain ageing, austenitic stainless steel, nickel-base alloy, TWIP, damage
Engineering and Technology
IdentifiersURN: urn:nbn:se:liu:diva-98239OAI: oai:DiVA.org:liu-98239DiVA: diva2:653396