Microstructure and mechanical properties of extruded Mg-Gd-Y-Zn-Zr alloys filled with intragranular LPSO phases
发布时间：2021-07-12
点击次数：
影响因子：4.342
DOI码：10.1016/j.matchar.2017.11.027
发表刊物：Materials Characterization
关键字：Magnesium alloy； LPSO； Dynamic recrystallization； EBSD； Mechanical property
摘要：A comparison has been made on the dynamic recrystallization (DRX), texture, and mechanical properties of the Mg-5.5Gd-4.4Y-1.1Zn-0.5Zr (wt%) alloys extruded with different ratios (ER, 36 and 7.1). Intragranular long period stacking ordered (LPSO) phases strongly restrict the DRX by restraining the lattice rotation of alpha-Mg grains and hindering the migration of the boundaries of DRX-ed grains. Extrusion with ER of 36 can widely break the intragranular LPSO phases and create a fully DRX-ed microstructure with a relatively random texture, while the lower ER of 7.1 fails to break the LPSO and leads to a bimodal microstructure with a strong basal fiber texture. Finer DRX-ed grains and smaller LPSO phases account for the superior tensile yield strength and elongation of the ER36 alloy. However, the ultimate tensile strength of the ER7.1 alloy catches up because its larger grain size causes an increase in the strain hardening rate.
合写作者：Chuming Liu, Shunong Jiang, Wenhui Liu, Liwei Lu
第一作者：XiaoJie Zhou
论文类型：期刊论文
通讯作者：Yonghao Gao
论文编号：WOS:000423248200010
学科门类：工学
一级学科：材料科学与工程
文献类型：J
卷号：135
页面范围：76-83
是否译文：否
发表时间：2018-01-01
收录刊物：SCI、EI