Quasi Static and Dynamic Characterization of Equal Channel Angular Extrusion (ECAE) Processed and Rolled AZ31 Magnesium Alloy Sheet
Abstract
Previously, we developed a rolling schedule for Equal Channel Angular Extruded (ECAE) AZ31 magnesium (Mg) alloy plate material. Herein, we compare the room temperature quasi-static and dynamic mechanical properties of the as-ECAE processed plates (with textures A and C) to the subsequently rolled sheet material. Further, our investigation compares the batch-to-batch variation of 2 different lots of texture C plate material. Earlier results have shown that the plate material (especially texture A) exhibits anisotropic mechanical properties in the transverse and longitudinal directions. While to a large extent the initial ECAE process-induced banded microstructure is preserved after rolling, the property difference between the 2 directions is minimized. Closer examination of the sheet materials reveals a highly aligned microstructure along the rolling direction, consisting of fine sub-10-m-sized Mg grains. Under dynamic loading conditions, both texture type sheet materials exhibit higher strengths, but lower ductility than at quasi-static testing conditions. The texture A sample was more ductile at the higher rates and yielded more consistent results than those obtained from the texture C sample.
Document Details
- Document Type
- Technical Report
- Publication Date
- Apr 01, 2017
- Accession Number
- AD1033236
Entities
People
- Laszlo J Kecskes
- Lothar Meyer
- Michael Eichhorst
- Norman Herzig
- Vincent H. Hammond
Organizations
- United States Army Research Laboratory