MATEC Web Conf.
Volume 67, 2016International Symposium on Materials Application and Engineering (SMAE 2016)
|Number of page(s)||7|
|Section||Chapter 5 Metallurgical Engineering|
|Published online||29 July 2016|
Microstructure and Mechanical Properties of As-cast 5182 Aluminum alloy Modified with Al-RE and Al-5Ti-1B Master Alloys
1 Baotou Aluminum Limited Company, Baotou 014046, China
2 Schools of Materials Science and Engineering, Inner Mongolia University of Technology., Hohhot 010051, China
The modification effects of Al-RE (rare earth) and Al-5Ti-1B master alloys on the microstructure and mechanical properties of as-cast 5182 aluminum alloys were studied. Experimental results show that both of the modifications refine the α-Al grains and the Mg2Si and (FeMn)Al6 eutectics. The Mg2Al3 phases exist in the forms of thin flake (β′-Mg2Al3) and small granule (β-Mg2Al3) for the unmodified 5182 aluminum alloy. Modifications with 0.1 wt% Al-5Ti-1B and 0.2 wt% Al-RE yield longer flakes of β′-Mg2Al3 and small amounts of β-Mg2Al3 granules. The other contents of the modifiers reduce the longer flakes of β′-Mg2Al3 but facilitate formation of the particles and islands of β-Mg2Al3. The 0.2 wt% of Al-RE modification yields the finest microstructure and the largest ductility; the 0.2 wt% of Al-5Ti-1B modification has better microstructure and the highest tensile strength.
© The Authors, published by EDP Sciences, 2016
This is an Open Access article distributed under the terms of the Creative Commons Attribution License 4.0, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
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