脉冲电流对AZ91镁合金温挤压过程中动态析出和微观组织的影响

王彬杉, 徐光, 任睿, 张强, 单召辉, 樊建锋

Effect of Electropulse on Dynamic Precipitation and Microstructure of AZ91 Magnesium Alloy During Warm Extrusion

WANG Binshan, XU Guang, REN Rui, ZHANG Qiang, SHAN Zhaohui, FAN Jianfeng

表2 挤压态AZ91镁合金样品中微观组织常数和挤出温度

Table 2 Microstructural parameters and post-temperature of extruded AZ91 magnesium alloys

Sample davg / μm dfg / μm dcg / μm fcg / % fβ / % dβav / μm ra fβ / r Tp / oC 250EX 1.07 - - - 76.9 0.48 2.73 3.20 270 EPAE-1 1.77 1.75 1.93 09.1 54.8 0.52 5.12 2.11 309 EPAE-2 2.09 1.97 3.05 11.2 40.2 0.41 1.76 1.96 320 EPAE-3 3.54 2.37 7.23 24.5 16.5 0.50 1.33 0.66 345