Effect of Mg on the Microstructure and Mechanical Properties of Al0.3Sc0.15Zr-TiB2 Composite |
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| Authors: | A K Lohar B N Mondal S C Panigrahi |
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| Affiliation: | (1) CAMP, CMERI (CSIR), Durgapur, 713209, India;(2) Department of Metallurgy and Materials Engineering, IIT, Kharagpur, India |
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| Abstract: | Al-0.3Sc-0.15Zr-TiB2 composites with varying additions of Mg were cast through a novel processing technique using oil Quenched Investment Casting
(QIC). Addition of Mg resulted in grain refinement of the composite. Al3(Sc, Zr) primary particles and TiB2 are responsible for grain refinement in these composites. Presence of fine nanosized uniformly distributed precipitates of
Al3(Sc, Zr) at the peak age condition together with TiB2 particles increase the strength and ductility of the composites. The presence of Sc and Zr reduces the size of TiB2 particles down to 10 nm. The optimum magnesium content in the composites studied lies between 3.5 and 6%. |
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