Ultrasonic assisted grain refinement of Al-Mg alloy using in-situ MgAl2O4 particles

被引：38
|
作者：
Harini, R. Sri [1 ]
Nampoothiri, Jayakrishnan [1 ]
Nagasivamuni, B. [1 ]
Raj, Baldev [1 ,2 ]
Ravi, K. R. [1 ]
机构：
[1] PSG Inst Adv Studies, Coimbatore 641004, Tamil Nadu, India
[2] Natl Inst Adv Studies, Bangalore 560012, Karnataka, India
来源：
MATERIALS LETTERS | 2015年 / 145卷
关键词：
MgAl2O4; particles; Grain refinement; Ultrasonic treatment; Solidification; Nanocomposites; Microstructure; METAL-MATRIX COMPOSITES; HETEROGENEOUS NUCLEATION; ALUMINUM-ALLOYS; MELT;
D O I：
10.1016/j.matlet.2015.01.132
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
MgAl2O4 particles were in-situ synthesised in Al-Mg melts using SiO2 precursor assisted by ultrasonic treatment (UT). 7 to 8 Fold reduction in grain size is achieved in Al-1Mg-0.1SiO(2) alloy subjected to 5 min UT. Reason behind the grain reduction is explained in terms of ultrasonic cavitation activated SiO2 reduction reaction, thereby increasing the number density of MgAl2O4 particles and their wettability. (C) 2015 Elsevier B.V. All rights reserved.
引用
收藏
页码：328 / 331
页数：4
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