Affordable Access

Publisher Website

Enhanced tensile ductility through boundary structure engineering in ultrafine-grained aluminum

Authors
Journal
Materials Science and Engineering A
0921-5093
Publisher
Elsevier
Publication Date
Volume
464
Identifiers
DOI: 10.1016/j.msea.2007.02.007
Keywords
  • Ultrafine-Grained Aluminum
  • Boundary
  • Mechanical Properties

Abstract

Abstract Commercial purity aluminum AA1050 billets with similar submicrometer grain sizes but distinctively different boundary structures were obtained by the use of different equal channel angular extrusion (ECAE) routes. Route “A” is defined as no rotation between extrusion passes, while route “C” is rotated 180° between extrusion passes. The microstructure processed by route “A” consists mainly of high-angle boundaries (HABs) while route “C” has primarily low-angle boundary (LAB) structures. Tensile tests conducted on these two microstructures at intermediate and dynamic strain rates at both 77 and 298 K were compared with the results of material tested at quasi-static strain rates. The boundary structure was found to play an important role in the mechanical properties at low temperature.

There are no comments yet on this publication. Be the first to share your thoughts.