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Volume 7, Issue 1 (February 2018)
Development of Processing Map and Constitutive Relationship for Thermomechanical Processing of Aluminum Alloy AA2014
(Received 10 May 2017; accepted 6 November 2017)
Published Online: 06 February 2018
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Isothermal hot compression tests were performed on aluminum alloy 2014 (AA2014) to study the evolution of microstructure over a wide range of temperatures (300°C–500°C) and strain rates (0.001–100 s−1). The true stress–true strain curves obtained at all deformation temperatures and strain rates showed gradual flow softening, which is typical of a dynamic recovery-type material such as aluminum. Processing maps that delineate the stable and unstable regions during hot working were developed and validated by comparing the microstructures recorded in the deformed specimens. Optimum processing conditions (temperature > 450°C, strain rate < 0.1 s−1) for the hot deformation of AA2014 were proposed based on contour maps of efficiency of power dissipation and strain-rate sensitivity parameter. The activation energy value (Qavg) for the hot working of AA2014 was calculated to be 181 kJ/mol−1. Finally, the constitutive equation for the hot working of AA2014 was established.
Narayana Murty, S. V. S.
Materials and Metallurgy Group, Vikram Sarabhai Space Center, Thumba Post OfficeTrivandrum,
Department of Materials Science and Engineering, Indian Institute of Technology, Gandhinagar,
Ramesh Narayanan, P.
Materials and Metallurgy Group, Vikram Sarabhai Space Center, Trivandrum,
Stock #: MPC20170056
Title Development of Processing Map and Constitutive Relationship for Thermomechanical Processing of Aluminum Alloy AA2014