Effects of Fe concentration on microstructure and corrosion of Mg-6Al-1Zn-xFe alloys for fracturing balls applications

• DOI: 10.1016/j.jmst.2019.04.012
• Publication Date: 2019-04-24T11:31:48Z
• Authors: Cheng Zhang; Liang Wu; Guangsheng Huang; Lin Chen; Dabiao Xia; Bin Jiang; Andrej Atrens; Fusheng Pan
• Keywords: Powder Metallurgy

Abstract Mg-6Al-1Zn-xFe (x = 0, 1, 3, 5 and 7 wt%) alloys were prepared by powder metallurgy and followed by hot extrusion. Majority of Fe element exists as insoluble particles in the alloys. The as-extruded alloys showed higher degradable rates but less stable mechanical properties than as-annealed alloys. Corrosion rate of all the alloys increased with increasing Fe concentration, reaching 2.4 mL cm−2 h-1. 0.2% yield strength of all the alloys was higher than 150 MPa. In short, Mg-6Al-1Zn-xFe alloys have an attractive combination of corrosion and mechanical properties, which holds a bright future for fracturing balls applications.