Microstructural Characterization of Beryllium Treated Al-Si Alloys
Joint Authors
Ibrahim, M. F.
Alkahtani, S. A.
Abuhasel, Kh. A.
Samuel, F. H.
Source
Advances in Materials Science and Engineering
Issue
Vol. 2015, Issue 2015 (31 Dec. 2015), pp.1-10, 10 p.
Publisher
Hindawi Publishing Corporation
Publication Date
2015-10-27
Country of Publication
Egypt
No. of Pages
10
Abstract EN
The present study was carried out on B356 and B357 alloys using the thermal analysis technique.
Metallographic samples prepared from these castings were examined using optical microscopy and FESEM.
Results revealed that beryllium causes partial modification of the eutectic Si, similar to that reported for magnesium additions.
Addition of 0.8 wt.% Mg reduces the eutectic temperature by ~10°C.
During solidification of alloys containing high levels of Fe and Mg, but no Sr, formation of a Be-Fe phase was detected at 611°C, close to that of α-Al.
The Be-Fe phase precipitates in script-like form at or close to the β-Al5SiFe platelets.
A new reaction, composed of fine particles of Si and π-Fe phase, was observed to occur near the end of solidification in high Mg-, high Fe-, and Be-containing alloys.
The amount of this reaction decreased with the addition of Sr.
Occasionally, Be-containing phase particles were observed as part of the reaction.
Addition of Be has a noticeable effect on decreasing the β-Al5FeSi platelet length; this effect may be enhanced by addition of Sr.
Beryllium addition also results in precipitation of the β-Al5FeSi phase in nodular form, which lowers its harmful effects on the alloy mechanical properties.
American Psychological Association (APA)
Ibrahim, M. F.& Alkahtani, S. A.& Abuhasel, Kh. A.& Samuel, F. H.. 2015. Microstructural Characterization of Beryllium Treated Al-Si Alloys. Advances in Materials Science and Engineering،Vol. 2015, no. 2015, pp.1-10.
https://search.emarefa.net/detail/BIM-1053600
Modern Language Association (MLA)
Ibrahim, M. F.…[et al.]. Microstructural Characterization of Beryllium Treated Al-Si Alloys. Advances in Materials Science and Engineering No. 2015 (2015), pp.1-10.
https://search.emarefa.net/detail/BIM-1053600
American Medical Association (AMA)
Ibrahim, M. F.& Alkahtani, S. A.& Abuhasel, Kh. A.& Samuel, F. H.. Microstructural Characterization of Beryllium Treated Al-Si Alloys. Advances in Materials Science and Engineering. 2015. Vol. 2015, no. 2015, pp.1-10.
https://search.emarefa.net/detail/BIM-1053600
Data Type
Journal Articles
Language
English
Notes
Includes bibliographical references
Record ID
BIM-1053600