Journal
MATERIALS CHARACTERIZATION
Volume 148, Issue -, Pages 35-42Publisher
ELSEVIER SCIENCE INC
DOI: 10.1016/j.matchar.2018.11.030
Keywords
Mg-Li-Al alloys; Microstructure; Hot-extrusion; Strengthening
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Funding
- National Natural Science Foundation of China [51401115]
- Promotive Research Fund for Excellent Young and Middle-aged Scientists of Shandong Province [BS2013CL034]
- Independent Innovation Foundation of Shandong University [GN2013001]
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Mg-9Li-3Al (wt%) alloys with addition of Sn and Y were prepared by vacuum melting followed by hot-extrusion process. Microstructure evolution of Mg-9Li-3Al alloys with Sn and Y addition was characterized by using optical microscopy, scanning electrical microscopy, transmission electrical microscopy, X-ray diffraction and mechanical properties were examined by tensile test. MgLi2Sn and MgLi2Al particles are observed in Mg-9Li-3Al-2Sn alloys and significant strength improvement is obtained due to precipitation hardening. The ultimate tensile strength (UTS) of Mg-9Li-3Al-2Sn is 251 MPa, which is the highest among all the studied Mg-9Li-3Al alloys, while the highest elongation (43.8%) at room temperature is obtained in Mg-9Li-3Al-2Y.
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