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Dynamic Behavior of a Rare-Earth-Containing Mg Alloy, WE43B-T5, Plate with Comparison to Conventional Alloy, AM30-F

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Abstract

The dynamic behavior of Mg alloys is an area of interest for applications such as crash-sensitive automotive components and armor. The rare-earth element-containing alloy WE43B-T5 has performed well in ballistic testing, so the quasi-static (~10−3 1/s) and dynamic (~600–5000 1/s) mechanical behaviors of two Mg alloys, rolled WE43B-T5 and extruded AM30-F, were investigated using servohydraulic and Kolsky bar testing in uniaxial tension and compression. The yield stress was surprisingly isotropic for WE43B-T5 relative to conventional Mg alloys (including extruded AM30-F). The WE43B plate was textured; however, it was not the typical basal texture of hot-rolled Mg-Al alloys. The effect of strain rate on the yield strength of WE43B-T5 is small and the strain-hardening behavior is only mildly rate sensitive (m = 0.008). The combination of high strength (~300 MPa), moderate ductility (0.07–0.20), and low density yield a material with good specific energy absorption capacity.

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Acknowledgements

S.R.A. would like to thank McMaster University for sponsoring a visiting faculty appointment during which this article was written. The research at U.V.A. and M.S.U. was sponsored by the United States Army Research Office under contract number W911NF-12-1-0455 monitored by Dr. Suveen Mathaudhu. The research at MENA and JHU was sponsored by the Army Research Laboratory and was accomplished under Cooperative Agreement No. W911NF-07-2-0073 with technical monitor, Kyu Cho. The views and conclusions contained in this document are those of the authors and should not be interpreted as representing the official policies, either expressed or implied, of the Army Research Laboratory or the U.S. Government. The U.S. government is authorized to reproduce and distribute reprints for government purposes notwithstanding any copyright notation hereon.

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Authors and Affiliations

  1. Materials Science and Engineering, University of Virginia, Charlottesville, VA, 22904-4745, USA

    Sean Agnew & Jishnu Bhattacharyya

  2. Mechanical Engineering, Mississippi State University, Starkville, MS, 39762, USA

    Wilburn Whittington, Andrew Oppedal & Haitham El Kadiri

  3. Mechanical Engineering, Johns Hopkins University, Baltimore, MD, 21218-2682, USA

    Matthew Shaeffer & K. T. Ramesh

  4. Magnesium Elektron North America, Madison, IL, 62060, USA

    Rick Delorme & Bruce Davis

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  1. Sean Agnew
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Correspondence to Sean Agnew.

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Agnew, S., Whittington, W., Oppedal, A. et al. Dynamic Behavior of a Rare-Earth-Containing Mg Alloy, WE43B-T5, Plate with Comparison to Conventional Alloy, AM30-F. JOM 66, 277–290 (2014). https://doi.org/10.1007/s11837-013-0830-x

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