High strain rate tensile testing of automotive aluminum alloy sheet

Equal-channel angular pressing (ECAP) at 443 K was used to introduce an ultra-fine grained (UFG) microstructure to a Zr and Sc modified 7075 aluminum alloy. Using the methods of TEM and EBSD, an average grain size of 0.6 1m was recorded after the pressing. The UFG microstructure remained very stable up to the temperature of 723 K, where the material exhibited high strain rate superplasticity (HSRSP) with elongations to failure of 610 % and 410 % at initial strain rates of 6.4 x 10-2 s-1 and 1 x 10-1 s-1, respectively. A strain rate sensitivity parameter m in the vicinity of 0.45 was observed at temperatures as high as 773 K. At this temperature, the material still reached an elongation to failure of 430 % at 2 x 10-2 s-1. These results confirm the stabilizing effect of the Zr and Sc additions on the UFG microstructure in a 7XXX series aluminum alloy produced by severe plastic deformation.

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High strain rate compressive characterization of aluminum alloy/fly ash cenosphere composites

JOM ◽

10.1007/s11837-011-0029-y ◽

2011 ◽

Vol 63 (2) ◽

pp. 53-56 ◽

Cited By ~ 32

Author(s):

Dung D. Luong ◽

Nikhil Gupta ◽

Atef Daoud ◽

Pradeep K. Rohatgi

Keyword(s):

Aluminum Alloy ◽

Fly Ash ◽

High Strain Rate ◽

Strain Rate ◽

High Strain ◽

Fly Ash Cenosphere

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Viscoplastic behavior of AA7075 aluminum alloy at high strain rate

Journal of Mechanical Science and Technology ◽

10.1007/s12206-021-1111-1 ◽

2021 ◽

Vol 35 (12) ◽

pp. 5405-5413

Author(s):

Keguo Zhang ◽

Yang Cao ◽

Jianlin An ◽

Keyi Wang

Keyword(s):

Aluminum Alloy ◽

High Strain Rate ◽

Strain Rate ◽

High Strain

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IBII Test for High Strain Rate Tensile Testing of Adhesives

Dynamic Behavior of Materials, Volume 1 - Conference Proceedings of the Society for Experimental Mechanics Series ◽

10.1007/978-3-319-95089-1_55 ◽

2018 ◽

pp. 301-305

Author(s):

A. Guigue ◽

L. Fletcher ◽

R. Seghir ◽

F. Pierron

Keyword(s):

High Strain Rate ◽

Strain Rate ◽

Tensile Testing ◽

High Strain

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Research on Flow Stress of Magnesium Alloy Sheet under Warm and High Strain Rate Forming Condition

Advanced Materials Research ◽

10.4028/www.scientific.net/amr.189-193.2522 ◽

2011 ◽

Vol 189-193 ◽

pp. 2522-2525

Author(s):

Zheng Hua Meng ◽

Shang Yu Huang ◽

Jian Hua Hu

Keyword(s):

Flow Stress ◽

Magnesium Alloy ◽

High Strain Rate ◽

Strain Rate ◽

Process Simulation ◽

High Strain ◽

Alloy Sheet ◽

Az31 Magnesium Alloy ◽

Rate Condition ◽

Magnesium Alloy Sheet

Process simulation is a powerful tool to predict material behaviors under specified deformation conditions, so as to optimize the processing parameters. The equation for flow stress is important to numerically analyze. However, the reported constitutive equations of magnesium alloy are only suitable for processing simulation with strain rate between 0.001-1s-1. In this paper, the strain-stress behavior of AZ31 under warm and high strain rate (>103s-1) condition has been investigated by split Hopkinson pressure bar experiments at elevated temperature. The results show that the influence of the temperature on flow stress is more obvious than that of strain rate; the flow stress decreases with the rise of temperature at a certain strain rate. Based on Johnson-Cook model, the constitutive equation of AZ31 magnesium alloy under warm and high strain rate condition has been given out by fitting the experimental data, which can be applied in process simulation of AZ31 magnesium alloy sheet forming.

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