Abstract
AbstractThe elevated temperature ductility of rapidly solidified 7091 powder metallurgy aluminium alloy was investigated in the temperature range 523–773 K, employing differential strain rate and constant crosshead speed tensile tests. The maximum strain rate sensitivity m attained is less than 0·3, despite the fine initial grain size of the alloy, and a maximum tensile ductility of 190% is obtained. The observed low m value and tensile ductility are attributed to the partially recrystallised microstructure and the preferential distribution of fine oxide particles. Dynamic grain growth at temperatures near 773 K may also restrict the tensile ductility. Irrespective of the test temperature and strain rate the alloy exhibits intergranular failure. Although the alloy does not respond to static recrystallisation, it seems possible to design a processing schedule aimed towards improving rate sensitivity of the flow stress and tensile ductility.MST/1759
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.
