About this Abstract |
Meeting |
12th International Conference on Magnesium Alloys and their Applications (Mg2021)
|
Symposium
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12th International Conference on Magnesium Alloys and their Applications (Mg 2021)
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Presentation Title |
Microstructure and Mechanical Properties of Ultrahigh-strength Low-alloy Mg-Al-Ca-Mn Extrusion Alloys |
Author(s) |
Mingyi Zheng, X.Q. Liu, Z.T. Li, X.G. Qiao |
On-Site Speaker (Planned) |
Mingyi Zheng |
Abstract Scope |
The development of high-strength wrought magnesium alloys are mostly based on strengthening from second phases. However, high number density of second phases reduces ductility and formability of Mg alloys. We developed new ultrahigh-strength low-alloy Mg-Al-Ca-Mn extrusion alloys by taking full advantage of fine-grain strengthening induced by ultrafine grains and grain boundary segregation-induced strengthening. The composition and extrusion parameters on microstructure and mechanical properties of low-alloy Mg-Al-Ca-Mn alloys were investigated. A Mg-1Al-1Ca-0.4Mn (wt%) alloy extruded at 200oC and extrusion rate of 1.5 mm/s exhibited TYS of 412 MPa, UTS of 419 MPa and elongation to failure of 12.0%, while a Mg-0.7Al-0.3Ca-0.4Mn (wt%) alloy extruded at 200oC and extrusion rate of 1.0 mm/s exhibited TYS of 412 MPa, UTS of 418 MPa and elongation to failure of 14.8%. The mechanism of microstructural evolution and strengthening mechanism of the ultrahigh-strength-low-alloy Mg-Al-Ca-Mn alloys were discussed. |
Proceedings Inclusion? |
Planned: At-meeting proceedings |