✍ Scribed by E Martı́nez-Flores; G Torres-Villaseñor
No coin nor oath required. For personal study only.
The microstructure and mechanical properties of room temperature-pressed specimens of Zinalco ( ) alloy Zn ᎐21Al᎐2Cu , prepared by powder metallurgy techniques, were evaluated. Cylinders of milled zinalco powder, with a particle size of 40᎐90 m, were prepared under an average pressure of 580 MPa at room temperature. The density of zinalco green compacts was 5 " 0.02 g / cm 3 . This value remained almost without change after sintering. The Rockwell ' f' hardness of zinalco green compacts was 33 Rf. This value increased up to 46 Rf during the first 10 h of sintering. After this period, hardness remained almost constant. Green compacts behave plastically when tested under compression by varying the strain rates between 10 y3 and 10 y1 s y1 . This material reached deformations as high as 113 / . Compacts that were sintered for 20 h at 473 K in air fracture at much lower deformations.
📜 SIMILAR VOLUMES
Mg-3Al-Zn alloys with ultrafine grain size (UFG) have been fabricated by consolidation of ball milling nanocrystalline powders. Firstly, the elemental powders of Mg, Al and Zn were ball milled to synthesize nanocrystalline alloy powders. The milled powders stored in an Al container were sintered for