Abstract
FCC-type multicomponent alloys exhibit exceptional high strength during cryogenic deformation owing to thermally activated process. Inspired by this, we proposed that the γ-austenite of Fe-Mn-Cr-Si-Ni metastable multicomponent alloys would be strengthened by taking advantage of thermally activated process, and their shape memory effect would be improved by means of cryogenic deformation. As expected, the shape memory effect of Fe54.6Mn20.7Cr9.4Si10.5Ni4.8 metastable multicomponent alloy was enhanced by the cryogenic deformation of 77 K because γ-austenite was drastically strengthened by the remarkable increment of thermally activated stress. However, the shape memory effect of Fe61.6Mn14.2Cr8.8Si10.5Ni4.9 and Fe57.3Mn18.0Cr9.4Si10.5Ni4.8 metastable multicomponent alloys was not improved by cryogenic deformation. It is ascribed to that the occurrence of ε → α′ martensitic transformation would deteriorate the shape memory effect and thus weakened the positive effect of thermally activated process. It should be an effective way to improve the shape memory effect of other metastable multicomponent alloys by virtue of thermally activated process.
Sign-in/Register to access full text options 
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.
