Effect of Hot Deformation on Microstructure and Mechanical Properties of Al-B4C Composite Containing Sc

Jian Qin; Zhan Zhang; X.-G. Chen

doi:10.4028/www.scientific.net/MSF.794-796.821

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HomeMaterials Science ForumMaterials Science Forum Vols. 794-796Effect of Hot Deformation on Microstructure and...

Effect of Hot Deformation on Microstructure and Mechanical Properties of Al-B₄C Composite Containing Sc

Abstract:

Scandium has been introduced into the Al-B₄C composite to form Al₃Sc precipitates which offer a significant strengthening effect and a good thermal stability of the mechanical properties at elevated temperatures. In the present study, the grain structure and Al₃Sc precipitation of the hot-rolled Al-15vol.% B₄C composite containing Sc were examined by optical and electron microscopes. The mechanical properties of the hot deformed composite were evaluated by means of Vickers microhardness measurements. The post heat treatment after hot rolling was conducted to obtain desirable mechanical properties. The hot-rolled Al-B₄C composite containing Sc can yield a considerable precipitation hardening under an appropriate post heat treatment. Results show that some Sc could be consumed during high temperature solution treatments, which remarkably reduced the precipitation hardening of Al₃Sc precipitates. The amount of Sc loss is associated with the deformation ratio and solution time.

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Materials Science Forum (Volumes 794-796)

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821-826

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https://doi.org/10.4028/www.scientific.net/MSF.794-796.821

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Online since:

June 2014

Authors:

Jian Qin*, Zhan Zhang, X.-G. Chen

Keywords:

Al-B₄C Metal Matrix Composite, Heat Treatment, Hot Deformation, Precipitation Hardening, Scandium

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