Dynamic recrystallization of AZ91 magnesium alloy during compression deformation at elevated temperature^①

来源期刊：中国有色金属学报(英文版)2004年第2期

论文作者：李淑波 王艳秋 郑明毅 吴昆

文章页码：306 - 310

Key words：AZ91 magnesium alloy; high temperature compression; continuous dynamic recrystallization

Abstract: High temperature compressive tests of AZ91 Mg alloy were carried out at 573-723 K and strain rates of 0.001-1 s^-1. The microstructures of as-compressed samples were observed by optical microscopy and transmission electron microscopy (TEM), and the microhardness was also tested. It is shown that with the increase of temperature or the decrease of strain rate, the flow stress decreases, at the same time the dynamic recrystallization (DRX) of the alloy is more noticeable. The microstructures reveal that continuous dynamic recrystallization, which develops through conversion of low-angle grain boundaries into high-angle boundaries, occurs preferentially at the grain boundary.