Structure-property analysis of in-situ Al-MgAl2O4 metal matrix composites synthesized using ultrasonic cavitation

被引：52

作者：

Sreekumar, V. M. ^{[1
]}

Babu, N. Hari ^{[1
]}

Eskin, D. G. ^{[1
]}

Fan, Z. ^{[1
]}

机构：

[1] Brunel Univ, BCAST, Uxbridge UB8 3PH, Middx, England

来源：

MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING | 2015年 / 628卷

基金：

英国工程与自然科学研究理事会;

关键词：

Grain refinement; Composites; Casting; Ultrasonic cavitation; GRAIN-REFINEMENT; PART I; MECHANICAL-PROPERTIES; ALUMINUM-ALLOYS; MG; FABRICATION; SOLIDIFICATION; STRENGTH; AL/MGAL2O4; PARTICLES;

D O I：

10.1016/j.msea.2015.01.029

中图分类号：

TB3 [工程材料学];

学科分类号：

0805 ; 080502 ;

摘要：

In-situ Al-MgAl2O4 metal matrix composite was successfully manufactured using SiO2 with the aid of ultrasonication. MgAl2O4 particles and their clusters were identified at grain boundaries and interdendritic regions within the grain envelopes. The composite showed 2-5 fold reduction of grain size with respect to the reference alloy cast at similar conditions. The composite showed 10% increase in yield stress and 15% increase in LTTS while maintaining the ductility similar to reference alloy. LIE mismatch strengthening and grain boundary strengthening are suggested to be influencing mechanisms in the improvement of mechanical properties. (C) 2015 Elsevier B.V. All rights reserved.

引用

页码：30 / 40

页数：11

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