High strength and superior ductility of an ultra-fine grained magnesium–manganese alloy

The addition of manganese in magnesium has the positive effects on improving the corrosion resistance, creep behavior and damping capacity, and refining the microstructure of as-extruded Mg–Gd, Mg–Zn, Mg-RE–Zn etc. magnesium alloys. However, magnesium–manganese binary alloys are not considered as st...

Full description

Saved in:
Bibliographic Details
Published in:Materials science & engineering. A, Structural materials : properties, microstructure and processing Structural materials : properties, microstructure and processing, 2015-11, Vol.648, p.202-207
Main Authors: Yu, Zhengwen, Tang, Aitao, Wang, Qin, Gao, Zhengyuan, He, Jiejun, She, Jia, Song, Kai, Pan, Fusheng
Format: Article
Language:English
Subjects:
Elongation
Intensified texture
Magnesium
Magnesium base alloys
Magnesium-manganese alloy
Manganese
Mechanical properties
Microstructure
Slip
Texture
Ultra-fined microstructure
Yield strength
Citations: Items that this one cites
Items that cite this one
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary:The addition of manganese in magnesium has the positive effects on improving the corrosion resistance, creep behavior and damping capacity, and refining the microstructure of as-extruded Mg–Gd, Mg–Zn, Mg-RE–Zn etc. magnesium alloys. However, magnesium–manganese binary alloys are not considered as structural applications because of their poor ductility and insufficient strength at room temperature which can be attributed to the strong basal texture and coarsened microstructure. In the present work, therefore, microstructure and mechanical properties of Mg–1.0Mn alloy subjected to low temperature extrusion process has been investigated. The results reveal that the alloy shows superior elongation with sustained yield strength at room temperature. The outstanding elongation is explained as the ultra-fined microstructure by reducing the critical resolved shear stress (CRSS) that favors prismatic slip activity to accommodate basal slip. A simultaneous increasing in yield strength and yield anisotropy is as a result of the ultra-fined grains and finer Mn precipitates in the alloy.
ISSN:0921-5093
1873-4936
DOI:10.1016/j.msea.2015.09.065