Abstract
Stacking Fault Energy in Relation to Hydrogen Environment Embrittlement of Metastable Austenitic Stainless CrNi-Steels
Highlights
Metastable austenitic steels can potentially undergo a thermally-induced phase transformation due to undercooling
Two metastable CrNi steels of the type AISI 304L were investigated with respect to the direct γ → α’ and indirect γ → ε → α’ phase transformation dependent on the stacking fault energy as a result of plastic deformation at room temperature (RT)
As a result of plastic deformation, deformation-induced formation of the intermediate stage of ε-martensite was detected in the alloy with an stacking fault energy (SFE) of 18.7 ± 0.4 mJ/m2, whereas the alloy with an SFE of 22.7 ± 0.8 mJ/m2 directly transformed via the γ → α’ sequence
Summary
Metastable austenitic steels can potentially undergo a thermally-induced phase transformation due to undercooling. At or near room temperature (RT), austenitic steels generally exhibit a face-centered cubic (fcc) lattice structure, which has implications regarding the thermal phase stability. These steels are able to partially transform into α’-martensite through deformation. The common feature of the aforementioned austenitic steel grades is the relation between the stacking fault energy (SFE) and the deformation mechanism, which is characterized by a direct or indirect martensitic transformation. In this regard, metastable austenitic stainless CrNi- and
Sign-in/Register to view highlights & summary Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
