Intergranular micro-deformation behavior of a medium strength 7xxx aluminum alloy

Compression experiments were designed to examine the intergranular deformation behaviors of 7xxx aluminum alloy at a micro-scale. Band structures formed in grains upon deformation were characterized by electron backscatter diffraction technique, and the local stored energy was analyzed in a quantitative way. In addition, the deformation behaviors of the six pairs of adjacent deformed grains show that, the dislocation slips are transmissible between some pairs of grains but terminated in front of other grain boundaries. Such slip transmission is influenced by the Schmid factor, the strain coordination factor mMODIFIER LETTER PRIME, and the degree of strain concentration between grains, according to the analysis of kernel average misorientation. (c) 2021 The Author(s). Published by Elsevier B.V. This is an open access article under the CC BY-NC-ND license (http://creativecommons.org/licenses/by-nc-nd/4.0/).

Automated summary

Compression experiments were conducted to study the intergranular deformation behaviors of 7xxx aluminum alloy at a micro-scale. The results showed that dislocation slips could be transmitted between some pairs of adjacent deformed grains, influenced by factors such as the Schmid factor and the degree of strain concentration between grains.