Abstract
A Ni50.3Ti41.7Hf8 alloy was studied after two-step aging treatments consisting of 300°C for 12h followed by 550°C for different times. An anomalous change in transformation temperatures was observed as the second aging time was increased from 7.5 to 13.5h. Initially with increased aging time (0.5–7.5h) at 550°C, coherency strain fields about H-phase precipitates increased. The corresponding backstress favored martensite formation, hence an increase in transformation temperatures. However, a point was eventually reached where misfit dislocations relaxed those strain fields and the effect was reduced, resulting in a decrease in transformation temperatures.
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.
