Abstract
The effect of Mn content on mechanical properties and microstructure of Mg-0.3Al-0.3Ca-xMn (wt%, x=0, 0.2, 0.4, 0.8) dilute alloys extruded at a high die-exit speed of 60m/min has been investigated. The strengths of the as-extruded samples increased with increasing Mn content, and Mg-0.3Al-0.3Ca-0.8Mn (AXM030308) alloy exhibited the highest 0.2% proof stress of 190MPa. This is due to the formation of fine and strongly textured grain structure as well as the dispersion of high number density of Al-Mn particles. Subsequent solution treatment and peak aging resulted in further increase in strength. High number density of Guinier Preston zones (G.P. zones) were dispersed within fine grains with their [0001] axis normal to the extrusion direction in the peak aged Mg-0.3Al-0.3Ca-0.4Mn (AXM030304) alloy, exhibiting the highest 0.2% proof stress of 220MPa with reasonable tensile ductility of 22%, which are superior to those of a peak aged 6063 aluminum alloy.
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.
