Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
1578302 | Materials Science and Engineering: A | 2011 | 4 Pages |
Microstructure and mechanical properties of quasicrystals dispersed Mg alloys prepared by warm extrusion of the mixtures of Mg and Zn–Mg–Zr quasicrystalline (Qc) powders have been studied. Strong texture oriented along a 1 0 1¯ 0 direction observed in pure Mg was reduced in Qc-dispersed samples, as verified by pole figure method and electron back scattering diffraction. The ultimate tensile strengths at 150 °C for Qc-dispersed extrusions were much higher than 110 MPa for pure Mg, which drastically reached 156 MPa for 15 wt.% Qc by preventing the motion of dislocations. Elongation was improved by the randomization of grain orientation: from 5.7% for pure Mg to 12.9% for 10 wt.% Qc at room temperature; from 15% for pure Mg to 37.1% for 5 wt.% Qc at 150 °C.
► Powder-metallurgical warm extrusion made quasicrystal dispersing Mg alloys. ► Mg extrusions containing quasicrystals showed randomized textures. ► These extrusion showed the enhancement of mechanical properties at 150 °C.