کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
1578302 | 1001203 | 2011 | 4 صفحه PDF | دانلود رایگان |
![عکس صفحه اول مقاله: Textures and mechanical properties in rare-earth free quasicrystal reinforced Mg–Zn–Zr alloys prepared by extrusion Textures and mechanical properties in rare-earth free quasicrystal reinforced Mg–Zn–Zr alloys prepared by extrusion](/preview/png/1578302.png)
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.
Journal: Materials Science and Engineering: A - Volume 528, Issue 18, 15 July 2011, Pages 5871–5874