期刊
SCRIPTA MATERIALIA
卷 222, 期 -, 页码 -出版社
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.scriptamat.2022.115000
关键词
Magnesium alloys; Grain refining; Rapid solidification; Solidification microstructure; Hardness
Adding low-cost aluminum element to Mg-RE alloy can significantly refine the grain structure in the laser surface remelting process and improve the thermal stability by forming nanoscale intermetallic compounds.
Aluminum is a low-cost alloying element. Adding 1.5 Al (wt.%) to Mg-4Y-3Nd (Mg-RE) alloy leads to a significant grain refinement in the laser surface remelting (LSR) process. The in-situ precipitated Al2RE particles and interdendritic eutectic Al2RE phase formed during the previous solidification turn into a new class of nuclei, and refine the grain structure. The rapid solidification results in the formation of nanoscale Al-RE intermetallic compounds within alloy that ensure excellent thermal stability in grain structure with only 1.85% hardness loss after heat treatment at 545 ? for 30 h by Zener pinning mechanism.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据