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Characteristics of superplasticity domain in the processing map for hot working of an Al alloy 2014---20vol.%Al2O3 metal matrix composite

Radhakrishna Bhat , BV and Mahajan, YR and Roshan, HMd and Prasad, YVRK (1994) Characteristics of superplasticity domain in the processing map for hot working of an Al alloy 2014---20vol.%Al2O3 metal matrix composite. In: Materials Science and Engineering: A, 212 (1). 178-181 .

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Official URL: http://dx.doi.org/10.1016/0921-5093(94)90409-X

Abstract

The processing map for hot working of Al alloy 2014-20vol.%Al2O3 particulate-reinforced cast-plus-extruded composite material has been generated covering the temperature range 300-500 degrees C and the strain rate range 0.001-10 s(-1) based on the dynamic materials model. The efficiency eta of power dissipation given by 2m/(m + 1), where m is the strain rate sensitivity, is plotted as a function of temperature and strain rate to obtain a processing map. A domain of superplasticity has been identified, with a peak efficiency of 62% occurring at 500 degrees C and 0.001 s(-1). The characteristics of this domain have been studied with the help of microstructural evaluation and hot-ductility measurements. Microstructural instability is predicted at higher strain rates above (ls(-1)) and lower temperatures (less than 350 degrees C).

Item Type: Journal Article
Additional Information: Copyright of this article belongs to Elsevier science.
Keywords: Aluminium alloy; Superplasticity; Metal matrix; Processing map
Department/Centre: Division of Mechanical Sciences > Materials Engineering (formerly Metallurgy)
Date Deposited: 25 Mar 2011 05:40
Last Modified: 25 Mar 2011 05:40
URI: http://eprints.iisc.ernet.in/id/eprint/36276

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