Preparation and thermomechanical properties of stir cast Al�??2Mg�??11TiO2 (rutile) composite

Bulletin of materials science

A K Singh³  S C Panigrahi²  S K Chaudhury¹  C S S Sivaramakrishnan³ 

[1] National Metallurgical Laboratory, Jamshedpur 831 007, India$$100 Institute Road, MPI, WPI, Worcester, MA 01609, USA$$National Metallurgical Laboratory, Jamshedpur 831 007, IndiaNational Metallurgical Laboratory, Jamshedpur 831 007, India$$100 Institute Road, MPI, WPI, Worcester, MA 01609, USA$$100 Institute Road, MPI, WPI, Worcester, MA 01609, USANational Metallurgical Laboratory, Jamshedpur 831 007, India$$100 Institute Road, MPI, WPI, Worcester, MA 01609, USA$$;Department of Metallurgical and Materials Engineering, Indian Institute of Technology, Kharagpur 721 302, India$$Department of Metallurgical and Materials Engineering, Indian Institute of Technology, Kharagpur 721 302, IndiaDepartment of Metallurgical and Materials Engineering, Indian Institute of Technology, Kharagpur 721 302, India$$;National Metallurgical Laboratory, Jamshedpur 831 007, India$$National Metallurgical Laboratory, Jamshedpur 831 007, IndiaNational Metallurgical Laboratory, Jamshedpur 831 007, India$$

关键词: Metal matrix composites;    stir cast;    rutile.;   

DOI  :  

学科分类：材料工程

来源: Indian Academy of Sciences

【 摘 要 】

Alâ€�??2Mgâ€�??11TiO₂ composite was successfully prepared by the conventional vortex method. The macrostructural observation revealed columnar structure with rutile particles being distributed throughout the matrix in the form of agglomerates. Microstructural observation showed the presence of micro voids in the particle-enriched zone. Electrical resistivity measurement showed a phase transformation at 360°C, which was consistent during DSC studies due to the precipitation of TiAl₃ phase. As-cast composite was both hot rolled and cold rolled successfully to 50 and 40% reduction, respectively. The mechanical properties of the thermomechanically-worked composite were studied. From fractographic analysis, it was clear that the crack had nucleated at the particle/matrix interface and propagated through the matrix by microvoid coalescence. Ultimate tensile strength of cold worked composite was found to be better than the hot worked material.

【 授权许可】

Unknown