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Paper Titles
Preface
Enlarged Zn, Mg Contents with a same Zn/Mg Ratio Improve Fatigue Crack Propagation Resistance of Al-Zn-Mg-Cu Alloys with T7651 State
p.3
Residual Stress Distribution of Non-Uniform Quenching in Al-Zn-Mg-Cu Aluminum Alloy Thick Plate
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Flow Stress Behavior of Al-3.5Cu-1.0Li-0.4Mg-0.6Zn-0.3Ag Alloy under Hot Tension
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Severe Plastic Deformation-Key Features, Methods and Application
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Study on the Precipitation Behavior of Precipitates of 7075 Aluminum Alloy Friction Stir Welding Joint
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The Influence of Controlled Rolling and Cooling on Microstructure and Mechanical Properties of Marine Steel
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Effect of Cooling Methods on Microstructure and Mechanical Properties of Ti-3573 Alloy after Solution Treatment
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Flow Stress Behavior of Al-3.5Cu-1.0Li-0.4Mg-0.6Zn-0.3Ag Alloy under Hot Tension

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Abstract:

The hot deformation behavior and microstructure evolution of Al-3.5Cu-1.0Li-0.4Mg- 0.6Zn-0.3Ag aluminum lithium alloy were investigated by hot tensile tests on Gleeble-1500 thermal simulator at 480-510 °C and strain rates 0.0001-0.1 s-1. The results show that obvious flow steady-state phenomena occur during hot stretching and the main mechanism changes from dynamic recovery to dynamic recrystallization with the increase of temperature and decrease of strain rate. The constitutive equation was calculated using the true stress-strain curve obtained by the hyperbolic sinusoidal pair of deformation activation energy Q and temperature T proposed by Sellars and Tegart. The deformation heat activation energy is 226.783 KJ/mol.

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Periodical:

Materials Science Forum (Volume 1003)

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20-25

DOI:

https://doi.org/10.4028/www.scientific.net/MSF.1003.20

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Online since:

July 2020

Authors:

Dai Hong Xiao*, Ning Liu, Wen Sheng Liu

Keywords:

Aluminum Lithium Alloy, Constitutive Equation, Flow Steady State

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