Hot Deformation Resistance of an AA5083 Alloy under High Strain Rate

Abstract

Axisymmetric compression tests using Gleeble 3800 simulator were carried out to investigate hot deformation behaviors of an AA5083 alloy under high strain rate conditions. Sharp temperature rise and load cell ringing characterized by severely vibrational load responses were encountered at strain rates higher than 20 s-1 and sample buckling occurred at low temperatures. The load cell ringing was corrected using a moving average method with a two-way filtering operation to correct phase distortion. Isothermal flow curves were obtained by fitting the instantaneous temperatures into a binomial function, while buckling was correlated with sample height and Young’s modulus. After the corrections, hyperbolic sine equation was successfully used to extend from the hot tensile data having strain rates lower than 3 s-1 to 100 s-1. Quantitative analyses were accordingly made over the effects of temperature, strain rate and work hardening behavior on the flow curves. The previous constitutive equation in form of temperature, strain and strain rate was modified to predict the hot deformation resistance of the AA5083 alloy at temperatures of 250-450oC under the high strain rate operations.

Mechanical Properties of Strengthening 5083-H111 Aluminum Alloy Plates at Elevated Temperatures

“…Various aspects of the high-temperature performance of this alloy have been investigated in previous studies [22][23][24][25][26][27][28][29]. Summers et al [22,23] studied post-fire residual mechanical properties of 5083-H116, 6082-T651, and 6082-T6 aluminum alloy extrusions.…”

“…After exposing the alloys to elevated temperatures, tension tests and Vickers hardness measurements tests were performed to determine the mechanical response of the alloys and quantify the time and temperature-dependent behavior. Chen et al [24] investigated the hot deformation resistance of an AA5083 alloy under high strain rate. They made quantitative analyses over the effects of temperature, strain rate, and work hardening behavior on the flow curves and developed a modified constitutive equation for prediction of hot deformation resistance of the AA5083 alloy at high temperatures and high strain rate.…”

Effect of Process Parameters on the Microstructure and Mechanical Properties of Bars from Al-Cu-Mg Alloy Processed by Multipass Radial-Shear Rolling

“…The understanding of metals and alloys deformation behavior during hot working is of a great importance, rst of all, from the point of view of product properties formation. To study machinability and to establish optimal hot deformation parameters for certain metals and alloys, a number of research groups have made efforts to carry out thermomechanical experiments (compression, tensile and torsion tests) at wide temperatures and strain rates [5][6][7][8]. At the same time, the processes of metal forming in industrial conditions are different from the ones in laboratory.…”

Constitutive analysis of biomedical grade Co-27Cr-5Mo alloy at high strain rates

“…Similarly, Sloof et al [30] incorporated a strain dependent parameter enabling accurate predictions of flow stress during deformation for a wide range of temperature and strain values. Lin et al [31], Shi et al [32] and Mandal et al [27] amongst others have successfully employed the strain and strain rate compensated Arrhenius type (ATC) equation to accurately predict flow stress behaviour of an assortment of materials for a broad collection of temperature and strain values.…”