Dynamic Behavior of a Rare-Earth-Containing Mg Alloy, WE43B-T5, Plate with Comparison to Conventional Alloy, AM30-F
Agnew, S. R., Whittington, W. R., Oppedal, A. L., El Kadiri, H., Shaeffer, M., Ramesh, K. T., Bhattacharyya, J., Delorme, R., & Davis, B. (2013). Dynamic Behavior of a Rare-Earth-Containing Mg Alloy, WE43B-T5, Plate with Comparison to Conventional Alloy, AM30-F. JOM. The Minerals, Metals & Materials Society. 66(2), 277-290. DOI:10.1007/s11837-013-0830-x.
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.