Abstract
Newton's metal is important for industrial applications that is the reason for studying the effect of modified structure of it’s on mechanical and thermal properties. Microstructure, mechanical properties such as elastic modulus Vickers hardness, internal friction and melting temperature of Bi50Pb34Sn16, Bi50Pb28Sn22, Bi50Pb22Sn28 and Bi50Pb16Sn34 alloys have been studied and analyzed. X-ray analysis of these alloys show that, it contained different phases with formed a solid solution. Elastic modulus variable decrease, melting temperature varied, internal friction and Vickers hardness increased due to modified Newton's metal (Bi50Pb31.2Sn18.8) alloy.
Highlights
Fusible alloys have low melting points compositions as bismuth, lead, tin, cadmium, or indium, which used in many applications such as fusible element in safety devices [1,2,3] and alarms, radio-opaque contrast medium in x-ray, solder and nuclear medicine as a shielding block [4]
The differential scanning calorimetry (DSC) thermographs are obtained by Universal V4. 5A TA Instrument with heating rate 10 k/min in the temperature range 0-400 C
From x-ray diffraction patterns, Bi50Pb34Sn16, Bi50Pb28Sn22, Bi50Pb22Sn28 and Bi50Pb16Sn34 alloys have sharp lines of rhombohedral crystals of bismuth, body-centered tetragonal tin, body-centered tetragonal bismuth–tin
Summary
Fusible alloys have low melting points compositions as bismuth, lead, tin, cadmium, or indium, which used in many applications such as fusible element in safety devices [1,2,3] and alarms, radio-opaque contrast medium in x-ray, solder and nuclear medicine as a shielding block [4]. Microstructure, thermal parameters, internal friction, wettability and electrochemical corrosion behavior for bismuth- tin based alloy, Bi30Sn50Sb10Al5Zn3Cu2, Bi25Sn61Sb5Zn4Al3Ag2, and Bi20Sn60Sb7Al5Zn3Cd3Cu2 alloys were studied by different experimental techniques. The results show that, properties for Bi- Sn alloys based changed after adding alloying elements [5, 6]. Several studies [7,8,9,10,11,12,13,14,15,16] covered structure, mechanical and thermal properties of bismuth based or tin based alloys with studying the effect of alloying elements on their properties. The aim of this research is to study the effect of modified structure on mechanical and thermal properties of bismuth based alloys
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