Journal
PHILOSOPHICAL MAGAZINE
Volume 96, Issue 25, Pages 2671-2685Publisher
TAYLOR & FRANCIS LTD
DOI: 10.1080/14786435.2016.1212174
Keywords
Magnesium alloy; solute atom; tensile ductility; grain boundary sliding; grain boundary segregation
Categories
Funding
- JSPS [25420765, 25102712]
- Grants-in-Aid for Scientific Research [25102712, 25420765] Funding Source: KAKEN
Ask authors/readers for more resources
The impact of alloying elements on the room temperature tensile behaviour was investigated for a wide range of strain rates using eight types of extruded Mg-0.3at.% X (X=Ag, Al, Li, Mn, Pb, Sn, Y and Zn) binary alloys with an average grain size of 2-3m. The solid solution alloying element affected not only tensile plasticity but also rate-controlling mechanism for these fine-grained magnesium alloys. Most of the alloys exhibited an elongation-to-failure of 20-50% , while the alloys with a high m-value exhibited large tensile plasticity, such as an elongation-to-failure of 140% in a strain rate of 1x10(-5)s(-1) for the Mg-Mn alloy. This elongation-to-failure is more than two times larger than that for pure magnesium. This is due to the major contribution of grain boundary sliding (GBS) on the deformation. Microstructural observations reveal that grain boundary segregation, which is likely to affect gain boundary energy, plays a role in the prevention or enhancement of GBS. The present results are clearly expected to open doors to the development of magnesium alloys with good secondary formability at room temperature through the control of alloying elements.
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