Effect of strontium content on the mechanical properties of hypo and hyper al-Si cast alloys
Joint Authors
Umran, A. M.
Mutasim M. Kh.
Ali, Muhammad M.
Izz al-Din, Muhammad
Source
Journal of Al-Azhar University Engineering Sector
Issue
Vol. 13, Issue 49 (31 Oct. 2018), pp.1322-1331, 10 p.
Publisher
al-Azhar University Faculty of Engineering
Publication Date
2018-10-31
Country of Publication
Egypt
No. of Pages
10
Main Subjects
Physics
Materials Science , Minerals
Topics
Abstract EN
Al-Si alloys are the most important aluminium cast alloys because of their superior casting properties such as good castability, low specific gravity, low viscosity and high resistance to wear and corrosion.
The effect of strontium (Sr) addition -as a modifier- on the microstructure, hardness and tensile strength properties of the Al-Si alloys at different silicon contents (3.4, 6.7, 9.3, 12.4, and 13.4 %) was investigated.
Sr content in these groups ranged between 0.086 to 0.181 %.
The nanohardnesss and maximum displacement for Al-Si alloys with different percentages of silicon (6.65, 9.14, 12.23 and 13.5 % respectively) at constant Sr (0.02%) were introduced and strain hardening was detected.
The results indicated that the addition of Sr to Al-Si alloy modified the Al-Si morphology from large plates or needle-like silicon structure to fine-scale fibrous silicon structure and hence improved the tensile strength and hardness.
The values of hardness and tensile strength of Al- 13-14 Si % were increased from 64.5 to 72 BHN and from 154.8 to 172.4 MPa respectively with increasing the percentage of Sr from 0.086 to 0.17 %.
The hardness percentage in nanoindentation measurements was increased by about 26%, while the maximum displacement was decreased from about 7400 nm to about 4930 nm when the Si % increasing from 6.65 to 13.5 %.
American Psychological Association (APA)
Umran, A. M.& Ali, Muhammad M.& Mutasim M. Kh.& Izz al-Din, Muhammad. 2018. Effect of strontium content on the mechanical properties of hypo and hyper al-Si cast alloys. Journal of Al-Azhar University Engineering Sector،Vol. 13, no. 49, pp.1322-1331.
https://search.emarefa.net/detail/BIM-925015
Modern Language Association (MLA)
Umran, A. M.…[et al.]. Effect of strontium content on the mechanical properties of hypo and hyper al-Si cast alloys. Journal of Al-Azhar University Engineering Sector Vol. 13, no. 49 (Oct. 2018), pp.1322-1331.
https://search.emarefa.net/detail/BIM-925015
American Medical Association (AMA)
Umran, A. M.& Ali, Muhammad M.& Mutasim M. Kh.& Izz al-Din, Muhammad. Effect of strontium content on the mechanical properties of hypo and hyper al-Si cast alloys. Journal of Al-Azhar University Engineering Sector. 2018. Vol. 13, no. 49, pp.1322-1331.
https://search.emarefa.net/detail/BIM-925015
Data Type
Journal Articles
Language
English
Notes
Includes bibliographical references :
Record ID
BIM-925015