ABSTRACT
The microstructure and mechanical properties of the Mg–3Sn–2Al–1Zn (TAZ321) alloy extruded at 180–250°C and at a ram speed of 0.08 mm/s were investigated by optical microscope, X-ray diffraction, scanning electron microscope, transmission electron microscope, tensile testing and microhardness tester. The results indicate that the as-extruded alloy shows ultrafine dynamic recrystallisation grains, nanoscale Mg2Sn precipitates of 50–80 nm, strong texture and excellent mechanical properties, the degree of which mainly depends on the extrusion temperature. The tensile yield strength and elongation vary from 413 MPa and 6.7% of TAZ321 extruded at 180°C to 312 MPa and 14.1% of TAZ321 extruded at 250°C, which can be regulated flexibly.
Disclosure statement
No potential conflict of interest was reported by the authors.
ORCID
Wucheng Ding http://orcid.org/0000-0003-0361-6233
Yungui Chen http://orcid.org/0000-0001-8403-7289