Effects of different Al contents on as-cast microstructure and properties of Mg-Al-Si-Sr alloy
- DOI
- 10.2991/icaees-15.2015.44How to use a DOI?
- Keywords
- Mg-Al-Si-Sr alloy, Al content, microstructure, tensile properties, hardness
- Abstract
Effects of different Al additions (3wt.%, 5wt.%, 7wt.%, 9wt.% Al) on as-cast microstructure and properties of Mg-Al-1Si-0.5Sr alloy were studied. The average grain size decreases and then increases with the increasing of Al additions. There are polyhedral shape, fine fibers shape, a few Chinese script Mg2Si particles and -Mg17Al12 divorced eutectic phase appeared in the interdendritic area in Mg-3Al-1Si-0.5Sr alloys. With the increase of Al content, more and more -Mg17Al12 divorced eutectic phase appear in semi-continuous distribution. The lamellar-like shape -Mg17Al12 secondary-precipitated phase emerge with Al addition of 5wt.%, 7wt.% and 9wt.%. The optimum tensile properties of Mg-7Al-1Si-0.5Sr alloy can be obtained, where the ultimate strength, yield strength and elongation are 201.1MPa, 160.7MPa, 4.8% at ambient temperature and 164.5MPa, 128.0MPa, 7.4% at 150°C respectively. The hardness increased with the increasing of Al content.
- Copyright
- © 2015, the Authors. Published by Atlantis Press.
- Open Access
- This is an open access article distributed under the CC BY-NC license (http://creativecommons.org/licenses/by-nc/4.0/).
Cite this article
TY - CONF AU - Baichang Ma AU - Jinwei Wang AU - Jixue Zhou AU - Yunteng Liu AU - Dongqing Zhao AU - Linlin Zhang AU - Shouqiu Tang AU - Yuansheng Yang PY - 2015/07 DA - 2015/07 TI - Effects of different Al contents on as-cast microstructure and properties of Mg-Al-Si-Sr alloy BT - Proceedings of the 3rd International Conference on Advances in Energy and Environmental Science 2015 PB - Atlantis Press SP - 239 EP - 243 SN - 2352-5401 UR - https://doi.org/10.2991/icaees-15.2015.44 DO - 10.2991/icaees-15.2015.44 ID - Ma2015/07 ER -