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Thermal cycling of Mg-MMCs

Kumar, S and Ingole, S and Dieringa, H and Kainer, KU (2003) Thermal cycling of Mg-MMCs. In: Materials Science Forum, 426-4 . pp. 2119-2124.

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Official URL: http://www.scientific.net/MSF.426-432.2119


Creep resistant Mg alloy QE22 reinforced with maftec(R), saffil(R) or supertec(R) short fibres is cycled between room temperature and 308degreesC at different ramp rates in the longitudinal and transverse directions. From the careful analysis of the strain vs. temperature thermal cycling curves true material behaviour and artifacts from the dilatometer are deciphered. From this analysis true coefficient of thermal expansion and relaxation processes are deduced. Hysteresis at higher temperatures is attributed to the relaxation process, whereas hysteresis at low temperatures giving a tilt-ground shape to the thermal cycling curves is again an artifact due to the instrument. The change in ramp rate highlights this effect. Finally, the effect of thermal cycling on microstructure is examined.

Item Type: Editorials/Short Communications
Publication: Materials Science Forum
Publisher: Trans Tech Publications Inc..
Additional Information: Copyright of this article belongs to Trans Tech Publications Inc...
Keywords: Coefficient of Thermal Expansion;Magnesium;Metal Matrix Composite (MMC);Microstructure;Thermal Cycling
Department/Centre: Division of Mechanical Sciences > Materials Engineering (formerly Metallurgy)
Date Deposited: 25 Aug 2011 05:31
Last Modified: 25 Aug 2011 05:31
URI: http://eprints.iisc.ac.in/id/eprint/40289

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