Fusible alloys Microstructure

Fusible alloys are one of materials category which has attracted the attention of scientists and technologists around the world. Fusible alloys are usually eutectic mixtures of bismuth, lead, tin and cadmium. Fusible alloys melt at low temperature below 150 °C. The term fusible is used, when the alloy melts at low temperature, about the boiling water. In the past they known as Lipowitz’s, Wood’s, D’Arcet and Rose alloys and now they are known as Arconim’s alloys. Wood’s metal is the famous fusible alloy which contains 50% bismuth, 25% lead, 12.5% tin and 12.5% cadmium and melts at 70 °C. Fusible alloys are used in some fairly common items such as fire sprinkler systems in office buildings. Now other alloys having slightly different compositions in order to improve their peculiarities replaced them, because the field of applications of the mentioned alloys is extremely various. Fusible alloys are normally used in gravity casting but also lend themselves well to pressure casting and centrifugal casting methods. Bismuth alloys was primarily as laboratory interests before 1930. Bismuth alloys have very low melting temperature, low physical strength and used as solders for safe.