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Effect of age hardening on compressive deformation behavior of Al-alloy (LM13)–cenosphere hybrid foam prepared using CaCO3 as a foaming agent

Published online by Cambridge University Press:  07 August 2013

Dehi Pada Mondal ,
Nidhi Jha ,
Anshul Badkul ,
Bilal Gul ,
Shrinivas Rathod  and
Satyabrata Das
Dehi Pada Mondal*
Affiliation:
CSIR-Advanced Materials and Processes Research Institute, Bhopal 462026, India
Nidhi Jha
Affiliation:
CSIR-Advanced Materials and Processes Research Institute, Bhopal 462026, India
Anshul Badkul
Affiliation:
CSIR-Advanced Materials and Processes Research Institute, Bhopal 462026, India
Bilal Gul
Affiliation:
CSIR-Advanced Materials and Processes Research Institute, Bhopal 462026, India
Shrinivas Rathod
Affiliation:
CSIR-Advanced Materials and Processes Research Institute, Bhopal 462026, India
Satyabrata Das
Affiliation:
CSIR-Advanced Materials and Processes Research Institute, Bhopal 462026, India
*
a)Address all correspondence to this author. e-mail: [email protected]
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Abstract

LM13 Al-alloy—cenosphere hybrid foam (HF) was made by foaming LM13 alloy–cenosphere mixture through a stir casting technique using CaCO3 as a foaming agent. In the melt mixture, 35 vol% of cenosphere was used and the foaming temperature was varied (660 and 690 °C). The foam contains microporosities as well as macroporosities and hence these are referred as HFs. The age-hardening characteristics and thereof deformation behavior of these foams have been examined using both microhardness and plateau stress measurements. It is further noted that energy absorption and plateau stress are maximum, and densification strain is minimum under peak-aged condition irrespective of the density of HF. Empirical relations are proposed to predict plateau stress, densification strain, and energy absorption as a function of aging time and relative density.

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Articles
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Journal of Materials Research , Volume 28 , Issue 17: Focus Issue: Advances in the Synthesis, Characterization, and Properties of Bulk Porous Materials , 14 September 2013 , pp. 2528 - 2538
Copyright
Copyright © Materials Research Society 2013 

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