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Effect of Rare Earth Metals, Sr, and Ti Addition on the Microstructural Characterization of A413.1 Alloy
Joint Authors
Samuel, F. H.
Doty, Herbert W.
Samuel, A. M.
Valtierra, S.
Mahmoud, M. G.
Source
Advances in Materials Science and Engineering
Issue
Vol. 2017, Issue 2017 (31 Dec. 2017), pp.1-12, 12 p.
Publisher
Hindawi Publishing Corporation
Publication Date
2017-05-16
Country of Publication
Egypt
No. of Pages
12
Abstract EN
The present work was performed on A413.1 alloy containing 0.2–1.5 wt% rare earth metals (lanthanum or cerium), 0.05–0.15% Ti, and 0–0.02 wt% Sr.
These elements were either added individually or combined.
Thermal analysis, image analysis, and electron probe microanalysis were the main techniques employed in the present study.
The results show that the use of the depression in the eutectic temperature as a function of alloy modification cannot be applied in the case when the alloy is treated with rare earth metals.
Increasing the concentration of RE increases the solidification zone especially in Sr-modified alloys leading to poor feeding ability.
This observation is more prominent in the case of Ce addition.
Depending upon the amount of added Ti, two RE based intermetallics can be formed: (i) a white phase, mainly platelet-like (approximately 2.5 μm thick), that is rich in RE, Si, Cu, and Al and (ii) a second phase made up of mainly grey sludge particles (star-like) branching in different directions.
The grey phase is rich in Ti with some RE (almost 20% of that in the white phase) with traces of Si and Cu.
There is a strong interaction between RE and Sr leading to a reduction in the efficiency of Sr as a eutectic Si modifier causing particle demodification.
American Psychological Association (APA)
Mahmoud, M. G.& Samuel, A. M.& Doty, Herbert W.& Valtierra, S.& Samuel, F. H.. 2017. Effect of Rare Earth Metals, Sr, and Ti Addition on the Microstructural Characterization of A413.1 Alloy. Advances in Materials Science and Engineering،Vol. 2017, no. 2017, pp.1-12.
https://search.emarefa.net/detail/BIM-1124080
Modern Language Association (MLA)
Mahmoud, M. G.…[et al.]. Effect of Rare Earth Metals, Sr, and Ti Addition on the Microstructural Characterization of A413.1 Alloy. Advances in Materials Science and Engineering No. 2017 (2017), pp.1-12.
https://search.emarefa.net/detail/BIM-1124080
American Medical Association (AMA)
Mahmoud, M. G.& Samuel, A. M.& Doty, Herbert W.& Valtierra, S.& Samuel, F. H.. Effect of Rare Earth Metals, Sr, and Ti Addition on the Microstructural Characterization of A413.1 Alloy. Advances in Materials Science and Engineering. 2017. Vol. 2017, no. 2017, pp.1-12.
https://search.emarefa.net/detail/BIM-1124080
Data Type
Journal Articles
Language
English
Notes
Includes bibliographical references
Record ID
BIM-1124080