Open AccessThe Effect of Zn on the Properties of Mg-10Al-6Ca-1Sn Alloy
Author(s) -
Ratna Zuarni Ramli,
Mohd Muzamir Mahat,
M.Y Sabrina
Publication year - 2020
Publication title -
iop conference series. materials science and engineering
Language(s) - English
Resource type - Journals
eISSN - 1757-899X
pISSN - 1757-8981
DOI - 10.1088/1757-899x/834/1/012002
Subject(s) - microstructure , materials science , alloy , scanning electron microscope , eutectic system , composite material , composite number , grain boundary , metallurgy , analytical chemistry (journal) , chemistry , chromatography
In this study, Mg-10Al-6Ca-1Sn and Mg-17Al-4Zn-3Ca-1Sn composite alloys were prepared. They were prepared by melting them in argon atmosphere on a water-cooled copper hearth. The sample were then analyse to determine the microstructure and mechanical properties using scanning electron microscope (SEM) and hardness testing, respectively. Moreover, a few of tests had been done to observe and determine microstructure and mechanical properties of the alloys. Mg-17Al-4Zn-3Ca-1Sn alloy, the microstructure of Mg-17Al-4Zn-3Ca-1Sn alloy distinctly portrays fine grains, resulting abundant of grain boundaries, which consist of eutectic phase, surround of primary magnesium grains. In contrast, the Mg-10Al-6Ca-1Sn alloy exhibits large differences in grain size. As a control, the sample without the addition of Zn element portrays large particles and creating very small amount of grain boundaries in the captured area of 30 µm. In perspective of mechanical properties, Mg-17Al-4Zn-3Ca-1Sn composite alloy showed higher Vickers hardness value with average of 81.8 H v compared to Mg-10Al-6Ca-1Sn composite alloy, which was 70.5 H v . In conclusion, the addition of Zn has effectively improved the hardness of the Mg alloy. This is supported by XRD analysis, which confirms the phase of new alloys that composed of Zinc element.