Abstract
The elevated temperature ductility of rapidly solidified 7091 P/M Al alloy was explored in the temperature range of 523–723 K making use of strain rate change and constant crosshead speed tensile tests. The alloy exhibited a maximum strain rate sensitivity of 0.3 and 190% elongation despite its initial fine grain size of 2 µm. This relatively low ductility is attributed to partially recrystallized microstructure and preferential distribution of fine oxide particles. The alloy was subjected to a thermomechanical treatment involving solutionizing treatment (763 K/3 h) followed by water quenching, overaging (603 K/36 h) and warm rolling at 423 K to ∼ 80% reduction in area. With this treatment, a maximum of 450% elongation at 573 K and 623 K and a strain rate of 8 X 10-5 S-1 was observed. The optimal superplastic behavior is associated with continuous recrystallization and the consequent fine grain size.
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.
