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

MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING

卷:628

Article

Sreekumar, V. M.¹  Babu, N. Hari¹  Eskin, D. G.¹  Fan, Z.¹ 

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

关键词: Grain refinement;    Composites;    Casting;    Ultrasonic cavitation;   

DOI  :  10.1016/j.msea.2015.01.029

来源: Elsevier

【 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.

【 授权许可】

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