Abstract
Compression tests have been carried out at room temperature and 77 K on polycrystals and single crystals of Fe-Al alloys containing 17 to 27 at. % Al. Twinning is observed at temperatures up to room temperature after some deformation by glide. In certain cases untwinning may take place on unloading. The mechanism of twinning is promoted by lowering the test temperature and the aluminium content. A pseudo-elastic behaviour has been observed on sheared and compressed single crystals at room temperature. Optical microscope observations revealed very thin lamellae which disappear on unloading. They might be microtwins but the X-rays experiments have not yet enabled us to confirm this assumption. At 77 K, no pseudoelasticity is observed in DO3 alloys, but a shape memory effect can be measured on reheating the sample to room temperature. A twinning-untwinning mechanism is suggested to account for these results.
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.
