Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
7978760 | Materials Science and Engineering: A | 2015 | 8 Pages |
Abstract
The effect of adding Sn to an extruded Mg-8Al-2Zn (AZ82 alloy) was investigated by analyzing its microstructural characteristics before and after extrusion, and by conducting tensile and compressive tests with 2, 4, and 6Â wt% Sn addition. This revealed that although second phases formed during solidification are nearly fully dissolved by homogenization treatment in AZ82 alloy with 2Â wt% Sn, numerous Mg2Sn particles remain in AZ82 alloys with 4 and 6Â wt% Sn due to this concentration being over the solubility limit. All of the extruded alloys were found to have a fully recrystallized structure, yet the addition of 6Â wt% Sn created a considerable quantity of large, banded Mg2Sn particles oriented along the extrusion direction. The tensile and compressive yield strength gradually increased with Sn content mainly due to a decrease in the size of recrystallized grains and an increased amount of fine Mg2Sn precipitates, though this came at the expense of a decrease in elongation. It was also found that the ultimate tensile strength improves with Sn addition of up to 4Â wt%, but deteriorates beyond that point due to premature fracture caused by crack initiation at large particles.
Related Topics
Physical Sciences and Engineering
Materials Science
Materials Science (General)
Authors
Sung Hyuk Park, Jae-Gil Jung, Jonghun Yoon, Bong Sun You,