Accession Number:

AD1033236

Title:

Quasi Static and Dynamic Characterization of Equal Channel Angular Extrusion (ECAE) Processed and Rolled AZ31 Magnesium Alloy Sheet

Descriptive Note:

Technical Report,01 Apr 2015,30 Jan 2016

Corporate Author:

US Army Research Laboratory Aberdeen Proving Ground United States

Report Date:

2017-04-01

Pagination or Media Count:

58.0

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.

Subject Categories:

  • Metallurgy and Metallography

Distribution Statement:

APPROVED FOR PUBLIC RELEASE