Bonding interface zone of Mg-Gd-Y/Mg-Zn-Gd laminated composite fabricated by equal channel angular extrusion

来源期刊：中国有色金属学报(英文版)2010年增刊第2期

论文作者：吴迪 陈荣石 韩恩厚

文章页码：613 - 618

Key words：magnesium alloys; laminated composite; equal channel angular extrusion; bonding interface; bonding strength

Abstract: In order to improve the mechanical properties and corrosion resistance of Mg alloys, the equal channel angular extrusion (ECAE) was employed to fabricate the Mg-5Gd-5Y/Mg-2Zn-1Gd (GW55/ZG21) laminated composites. After fabrication and annealing treatment, the microstructural evolution, phase constitution, microhardness, and bonding strength were investigated on the bonding interface zone of GW55/ZG21 laminated composites. The bonding interface zone of GW55/ZG21 laminated composites comprises a lot of Mg₃(Y, Gd)₂Zn₃ particles along the bonding interface, some rod Mg₂₄(Y, Gd)₅ phases on GW55 side, and a precipitation free zone (PFZ) on ZG21 side. After annealing treatment, Mg₃(Y, Gd)₂Zn₃ particles along the bonding interface increase, rod Mg₂₄(Y, Gd)₅ phases on GW55 side decrease, and PFZ is broadened. Meanwhile, the hardness on the bonding interface zone decreases and the bonding strength increases from 126 MPa to 162 MPa.

基金信息：the National Basic Research Program of China