Grain refinement and high thermal stability in laser surface remelted Mg-4Y-3Nd-1.5Al alloy

被引：27

作者：

Wang, Lei ^{[1
]}

Liu, Dong -Rong ^{[1
]}

Chen, Tian ^{[2
]}

Wang, Shaofan ^{[1
]}

Cao, Yang ^{[1
]}

机构：

[1] Harbin Univ Sci & Technol, Sch Mat Sci & Chem Engn, 4 Lin Yuan Rd, Harbin 150040, Peoples R China

[2] Chinese Acad Sci, Chongqing Inst Green & Intelligent Technol, 266 Fang Zheng Rd, Chongqing 400714, Peoples R China

来源：

SCRIPTA MATERIALIA | 2023年 / 222卷

基金：

中国国家自然科学基金;

关键词：

Magnesium alloys; Grain refining; Rapid solidification; Solidification microstructure; Hardness; CRYSTALLOGRAPHY; NUCLEATION; ALUMINUM;

D O I：

10.1016/j.scriptamat.2022.115000

中图分类号：

TB3 [工程材料学];

学科分类号：

0805 ; 080502 ;

摘要：

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.

引用

页数：6

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