Potential of an Al-Ti-MgAl2O4 Master Alloy and Ultrasonic Cavitation in the Grain Refinement of a Cast Aluminum Alloy

被引：20
作者：
Sreekumar, V. M. [1 ]
Babu, N. H. [1 ]
Eskin, D. G. [2 ,3 ]
机构：
[1] Brunel Univ London, BCAST, Waterside House,Cowley Business Pk, Uxbridge UB8 2HP, Middx, England
[2] Brunel Univ London, Uxbridge, Middx, England
[3] Tomsk State Univ, Tomsk 634050, Russia
来源：
METALLURGICAL AND MATERIALS TRANSACTIONS B-PROCESS METALLURGY AND MATERIALS PROCESSING SCIENCE | 2017年 / 48卷 / 01期
基金：
英国工程与自然科学研究理事会;
关键词：
METAL-MATRIX COMPOSITES; HETEROGENEOUS NUCLEATION; AL-ALLOYS; PART I; FABRICATION; MECHANISMS; PARTICLES; MELT; SOLIDIFICATION; INTERFACES;
D O I：
10.1007/s11663-016-0824-5
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
A new grain refining master alloy containing MgAl2O4 and Ti was synthesized by in situ reaction of TiO2 particles in an Al-Mg melt. MgAl2O4 particles formed were distributed in the melt by ultrasonic cavitation processing. The obtained master alloy showed considerable (50 pct) grain refining ability in a commercial A357-type Al-Si alloy. Ultrasonication contributed further to 25 pct in the grain refinement. In comparison with a commercial Al-5 pct Ti-1 pct B master alloy, the efficiency of the new master alloy is less at a lower addition rate. Nevertheless, both master alloys performed similarly at higher additions. The strength and ductility of the inoculated and ultrasonicated alloy showed at least a 10 pct and a 50 pct increase, respectively, as compared with non-grain-refined alloy and a similar mechanical performance in comparison with the alloy inoculated with Al-5 pct Ti-1 pct B master alloy.
引用
收藏
页码：208 / 219
页数：12
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