Accession Number : AD1007092


Title :   Development of Rolling Schedules for Equal Channel Angular Extrusion (ECAE)-Processed AZ31 Magnesium Alloy


Descriptive Note : Technical Report,01 Nov 2014,31 Mar 2015


Corporate Author : US Army Research Laboratory Aberdeen Proving Ground United States


Personal Author(s) : Kecskes, Laszlo J ; Hammond,Vincent H ; Eichhorst,,Michael ; Herzig,Norman ; Meyer,Lothar


Full Text : https://apps.dtic.mil/dtic/tr/fulltext/u2/1007092.pdf


Report Date : 01 Apr 2016


Pagination or Media Count : 46


Abstract : Rolling procedures for equal channel angular extrusion (ECAE)processed AZ31 magnesium plates have been developed. Using a temperature of 300 C and a 10 reduction per rolling pass, the initially 9-mm-thick plates were successfully reduced into 1.5-mm-thick sheets. Two sets of plates, each with a different texture type, were evaluated. Microscopic examination of the rolled sheet material shows a highly heterogeneous substructure, consisting of 2 types of precipitate colonies dispersed in a refined grain size (10 m) magnesium alloy matrix. Furthermore, the as-rolled microstructure is banded, containing alternating layers of coarser and finer grains. These regions are separated by a network of shear bands. Mechanical testing results show a relatively high strength and high ductility. However, the ability to fabricate sheet material from the ECAE plates strongly depends on their initial texture. Moreover, texture A produces greater asymmetry in the measured ductility along the longitudinal and transverse directions, respectively, than does texture C.


Descriptors :   MAGNESIUM ALLOYS , ROLLING METALLURGY , temperature , grain size , extrusion , sheet metal


Distribution Statement : APPROVED FOR PUBLIC RELEASE