Achieving enhanced ductility in a dilute magnesium alloy through severe plastic deformation |
| |
Authors: | Kiyoshi Matsubara Yuichi Miyahara Zenji Horita Terence G. Langdon |
| |
Affiliation: | (1) the Department of Materials Science and Engineering, Faculty of Engineering, Kyushu University, 812-8581 Fukuoka, Japan;(2) the Departments of Aerospace & Mechanical Engineering and Materials Science, University of Southern California, 90089-1453 Los Angeles, CA |
| |
Abstract: | Experiments were conducted to evaluate the utility of a new processing procedure developed for Mg-based alloys in which samples are subjected to a two-step processing route of extrusion followed by equal-channel angular pressing (designated as EX-ECAP). The experiments were conducted using a Mg-0.6 wt pct Zr alloy and, for comparison purposes, samples of pure Mg. It is shown that the potential for successfully using ECAP increases in both materials when adopting the EX-ECAP procedure. For the Mg-Zr alloy, the use of EX-ECAP produces a grain size of ∼1.4 μm when the pressing is undertaken at 573 K. By contrast, using EX-ECAP with pure Mg at 573 K produces a grain size of ∼26 μm. Tensile testing of the Mg-Zr alloy at 523 and 573 K after processing by EX-ECAP revealed the occurrence of significantly enhanced ductilities with maximum elongations of ∼300 to 400 pct. |
| |
Keywords: | |
本文献已被 SpringerLink 等数据库收录! |
|