Effect of rolling temperature on microstructure and mechanical Properties of cryorolled Al-Mg-Si Alloy Reinforced with 3wt% TiB2 in-situ Composite

Gopi, B and Nagakrishna, N and Sivaprasad, K and Venkateswarlu, K (2012) Effect of rolling temperature on microstructure and mechanical Properties of cryorolled Al-Mg-Si Alloy Reinforced with 3wt% TiB2 in-situ Composite. Advanced Materials Research, 584. pp. 556-560.

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Abstract

The present work investigates the effect of rolling temperature on the mechanical properties and microstructural evolution of an Al-Mg-Si alloy with 3wt% TiB2 in-situ composite that was fabricated by stir casting route. The composite was rolled to a true strain of ∼0.7 at three different temperatures viz; room temperature (RT), liquid propanol (LP) and liquid nitrogen (LN)temperatures. Tensile tests revealed that the samples rolled at liquid nitrogen temperature exhibited improved properties compared to the samples rolled at other two temperatures. A tensile strength and ductility of 291 MPa and 8% respectively were exhibited by the liquid nitrogen rolled sample. The strength is observed to be ∼12% higher and ductility is ∼60% more when compared to the room temperature rolled sample. X ray diffraction peaks indicated that rolled samples exhibited considerable increase in peak broadening compared to the unrolled one, which is attributed to the increase of the lattice strain due to distortion and the decrease in grain size of the material. The enhanced mechanical properties of the liquid nitrogen rolled samples were attributed to the combined effect of grain refinement and accumulation of higher dislocation density.

Item Type: Article
Additional Information: Copyright to this article belongs to M/s. Trans Tech Publications
Uncontrolled Keywords: Al-Mg-Si alloy;In-situ composite;Cryorolling;X-ray diffraction;Tensile properties;Microstructure
Subjects: CHEMISTRY AND MATERIALS > Chemistry and Materials (General)
CHEMISTRY AND MATERIALS > Composite Materials
Depositing User: Ms. Alphones Mary
Date Deposited: 13 Feb 2013 04:54
Last Modified: 13 Feb 2013 04:54
URI: http://nal-ir.nal.res.in/id/eprint/11470

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