Change in Crystallographic Orientation Distribution during High Temperature Deformation in an Al-Mg-Mn Alloy Sheet Consisting of Coarse- and Fine-Grained Layers

Abstract

The change in crystallographic orientation distribution during high temperature deformation for an Al-Mg-Mn alloy sheet consisting of the coarse-grained surface and the fine-grained center layers has been investigated in order to reveal the deformation mechanism. The grain size dependence of the deformation behavior is discussed in the identical deformation condition by using the specially-prepared sheet. The grain structures in the coarse-grained surface layer of the sample deformed at 713 K are elongated in the tensile direction corresponding to the macroscopic elongation to failure. The structures related to the maximum elongation in both of the surface and center layers have preferred orientations of the tensile deformation. Further, the intragranular misorientation, grain boundary misorientation and high strain rate deformation are analyzed in detail.

Image Deep Learning Assisted Prediction of Mechanical and Corrosion Behavior for Al-Zn-Mg Alloys

“…The microstructure features of extruded aluminum in Fig. 11 are consistent with those in the relevant published paper [50]. The uneven strain and temperature distributions during the extrusion process also have an obvious influence on the intermetallic particles (IMPs) in the aluminum profiles [51].…”

Changes in Crystallographic Orientation Distribution during Superplastic Deformation in Aluminum Alloys

“…The concentrations of the textural components were gradually reduced during deformation. This tendency is different from the textural change in an Al-Mg-Mn alloy [11] as described below, which also means less contribution of dislocation slip during superplastic deformation. It is, therefore, confirmed that the preferred orientation is progressively randomized as superplastic deformation proceeds at the optimum strain rate.…”

“…The fractions of <001>//RD, <111>//RD and <011>//RD in the surface and center layers of Al-Mg-Mn alloy subjected to CCB and subsequent annealing were examined [11]. Remarkable increase in the tensile texture components <001>//RD and <111>//RD were found in the surface layer of coarse grains after deformation at 713K, particularly the higher strain rates.…”

“…An Al-4.7Mg-0.7Mn (A5083) alloy sheet of 1.5mm thick, which had been manufactured by the process of casting, homogenizing, hot and cold rolling, and a final continuous annealing at 673K, was used for continuous cyclic bending (CCB) [11]. From the 20pass-CCBent sheet, tensile specimens were machined with a gauge part of 4mm wide and 6mm long.…”

“…The aim of the present paper to review changes in crystallographic orientation distribution during superplastic deformation in Al-Zn-Mg-Cu [10] and Al-Mg-Mn [11] alloys investigated by using EBSD technique to reveal contribution of dislocation slips. Further, the deformation mechanisms in the alloys are discussed based on analysis of EBSD data.…”