Journal
ACTA MATERIALIA
Volume 57, Issue 18, Pages 5593-5604Publisher
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.actamat.2009.07.057
Keywords
Magnesium alloy; Dynamic recrystallization; Aging; Transmission electron microscopy; Three-dimensional atom probe analysis
Funding
- MEXT, Japan [18360339, 21360348]
- CREST, JST, Japan
- Grants-in-Aid for Scientific Research [18360339, 21360348] Funding Source: KAKEN
Ask authors/readers for more resources
We have investigated the microstructure development of Mg-2.4 Zn-0.1 Ag-0.1 Ca(-0.16 Zr) alloys during hot extrusion using electron backscattered diffraction (EBSD), transmission electron microscopy and three-dimensional atom probe (3DAP) analysis. The Zr-free alloy showed a uniformly recrystallized grain structure, while the Zr-containing alloy showed a bimodal grain structure composed of fine grains of several microns and unrecrystallized coarse grains containing fine precipitates. The precipitates were identified as Mg(Zn,Zr), which are considered to suppress dynamic recrystallization, resulting in a partially recrystallized grain structure with a bimodal grain distribution. EBSD analysis showed that both Zr-firee and Zr-containing alloys had a fiber texture of a (0 0 0 1) basal plane aligned with the extrusion direction. Three-dimensional atom probe (3DAP) analysis revealed that the Mg(Zn,Zr) precipitates were eliminated by solution heat treatment and beta(1)'-MgZn particles precipitated by subsequent aging, resulting in an enhanced yield strength of the extruded alloy. (C) 2009 Acta Materialia Inc. Published by Elsevier Ltd. All rights reserved.
Authors
I am an author on this paper
Click your name to claim this paper and add it to your profile.
Reviews
Recommended
No Data Available