Abstract
The AZ91 alloy containing (“AC”) and without (“AS”) Mg17Al12 phase were both subject to hot extrusion at 693K with the extrusion ratio of 16:1. Results showed that the pre-existed Mg17Al12 phase in “AC” alloy led to finer grain size and lower intensity of basal plane texture as compared with “AS” alloy. Almost the same YS between “AC” and “AS” alloy indicated that the grain boundary and precipitation strengthening of “AC” alloy was balanced by the texture strengthening and solid solution strengthening of “AS” alloy. Nevertheless, the elongated Mg17Al12 phase along extrusion direction in “AC” alloy reduced its ultimate tensile strength as compared with “AS” alloy. Existence of SiCp led to a dispersive and uniform distribution of Mg17Al12 phase, which gave a full play on grain boundary and precipitation strengthening in “AC” composite. Unlike “AC” alloy, just the uniform and dispersive Mg17Al12 phase in “AC” composite contributed to the higher YS and UTS as compared with “AS” composite.
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.
