Volume 25, Issue 1, June 2016, Pages 212–219
Ebenezer Donkoh1 and Oswald Nunoo2
1 Department of Physics, Kwame Nkrumah University of Science and Technology, Kumasi, Ghana
2 Department of Physics, Kwame Nkrumah University of Science and Technology, Kumasi, Ghana
Original language: English
Copyright © 2016 ISSR Journals. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
This research work studied the effect of heat treatment on some mechanical properties of locally produced sand cast Al-Si-Mg alloys. The T6 heat treatment method was used for the heat treatment. The results show that solution heat treatment of Al-14%Si-0.288Mg at 530 oC for 6 hours resulted in an ultimate tensile strength of (120.00±0.70 MPa) with impact energy of (20.00±2.65 J) and the as cast ultimate tensile strength was (122.00±0.70 MPa) with impact energy of (12.33±0.58 J).The peak ultimate tensile strength was (228.32±0.93 MPa) with impact energy (14.00±0.58 J) when artificially aged at 170 oC for 5 hours. The peak strength at 160 oC for 7 hours was (200.40±0.98 MPa) with impact energy (13.67±0.58 J). These values obtained for the ultimate tensile strength were within the European standards for the ultimate tensile strength of sand cast Al-Si-Mg alloys (ISO Al Si7Mg, ISO AlSi10Mg and ISO Al Si12Cu in the T6 conditions are 260, 260 and 170 MPa) respectively. Also Al-Si-Mg alloy responded to the heat treatment very well.
Author Keywords: Solution Treatment, Ageing Time, Ageing Temperature, Intermetallic Phases.
Ebenezer Donkoh1 and Oswald Nunoo2
1 Department of Physics, Kwame Nkrumah University of Science and Technology, Kumasi, Ghana
2 Department of Physics, Kwame Nkrumah University of Science and Technology, Kumasi, Ghana
Original language: English
Copyright © 2016 ISSR Journals. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
Abstract
This research work studied the effect of heat treatment on some mechanical properties of locally produced sand cast Al-Si-Mg alloys. The T6 heat treatment method was used for the heat treatment. The results show that solution heat treatment of Al-14%Si-0.288Mg at 530 oC for 6 hours resulted in an ultimate tensile strength of (120.00±0.70 MPa) with impact energy of (20.00±2.65 J) and the as cast ultimate tensile strength was (122.00±0.70 MPa) with impact energy of (12.33±0.58 J).The peak ultimate tensile strength was (228.32±0.93 MPa) with impact energy (14.00±0.58 J) when artificially aged at 170 oC for 5 hours. The peak strength at 160 oC for 7 hours was (200.40±0.98 MPa) with impact energy (13.67±0.58 J). These values obtained for the ultimate tensile strength were within the European standards for the ultimate tensile strength of sand cast Al-Si-Mg alloys (ISO Al Si7Mg, ISO AlSi10Mg and ISO Al Si12Cu in the T6 conditions are 260, 260 and 170 MPa) respectively. Also Al-Si-Mg alloy responded to the heat treatment very well.
Author Keywords: Solution Treatment, Ageing Time, Ageing Temperature, Intermetallic Phases.
How to Cite this Article
Ebenezer Donkoh and Oswald Nunoo, “Study of the Effects of Ageing Temperature and Ageing Time on the Microstructure and Some Mechanical Properties of Sand Cast Al-Si-Mg Alloys,” International Journal of Innovation and Scientific Research, vol. 25, no. 1, pp. 212–219, June 2016.
