Influence of Sn addition on the microstructure and mechanical properties of extruded Mg-8Al-2Zn alloy
- Authors
- Park, Sung Hyuk; Jung, Jae-Gil; Yoon, Jonghun; You, Bong Sun
- Issue Date
- Feb-2015
- Publisher
- ELSEVIER SCIENCE SA
- Keywords
- Magnesium alloys; Sn addition; Extrusion; Dynamic recrystallization; Precipitation
- Citation
- MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING, v.626, pp.128 - 135
- Indexed
- SCIE
SCOPUS
- Journal Title
- MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
- Volume
- 626
- Start Page
- 128
- End Page
- 135
- URI
- https://scholarworks.bwise.kr/erica/handle/2021.sw.erica/18830
- DOI
- 10.1016/j.msea.2014.12.039
- ISSN
- 0921-5093
- 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 6 wt% Sn addition. This revealed that although second phases formed during solidification are nearly fully dissolved by homogenization treatment in AZ82 alloy with 2 wt% Sn, numerous Mg2Sn particles remain in AZ82 alloys with 4 and 6 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 6 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 4 wt%, but deteriorates beyond that point due to premature fracture caused by crack initiation at large particles. (C) 2014 Elsevier B.V. All rights reserved.
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