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Paper Titles
Preface and Organizing Committee
Influences of Solution Treatment, Deformation Strain, and Nanometric Al2O3 Particulate on Dry Wear Properties for Nanometric Al2O3 Particulate Reinforced Al Alloy Matrix Composites Manufactured by Casting
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The Flow Stress Behavior and Constitutive Equation of Nanometric Al2O3 Particulate Reinforced Al Alloy Matrix Composites

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Abstract:

The flow stress behavior and constitutive equation of the nanometric Al2O3 particulate reinforced Al alloy matrix composites were investigated in the temperature range from 590k-710k, and at the strain rates range from 0.01s-1-1s-1. Hot compression tests were carried out with thermal simulation machine Gleeble-1500. The results showed that the values of the true stresses rose rapidly and then held constant to some extent after attaining the peak values with the increasing strains at different deformation condition. The flow stress for the composites increased with increasing strain rate, which means that the experimental material is a sensitive material of positive strain rate, and decreased with decreasing temperature. Dynamic recovery and dynamic recrystallization occurred during hot compression of the composites. The constitutive equation represented by a Zener-Hollomon parameter in an exponent-type and the deformation activation energy are as follows respectively: σ=71.43ln{(Z/4.37×1011)1/5.94+[(Z/4.37×1011)2/5.94+1]1/2}, Q=197KJ mol-1.

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Periodical:

Advanced Materials Research (Volume 628)

Pages:

7-10

DOI:

https://doi.org/10.4028/www.scientific.net/AMR.628.7

Citation:

Cite this paper

Online since:

December 2012

Authors:

Zhi Min Zhang, Yong Biao Yang, Xing Zhang

Keywords:

Composite, Constitutive Equation, Flow Stress, Nanometric Al2O3 Particulate

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