Melt-spun Sn–Si alloy tapes were transformed to the grey modification at −30 °C to give compact specimens. On subsequent heating, the grey tin phase was seen to be stable to elevated temperatures, e.g., 90 °C for the Sn–0.6 wt % S alloy.

Overview Aluminum: Cast Shop and AlloysNovelis Inc. recently introduced a multi-alloy, multi-layered, aluminum ingot solidification technology that allows the production of a variety of engineered clad products on a commercial scale. The technology allows selection of the appropriate combinations of clad and core alloys to produce desired mechanical properties as well as forming and surface characteristics superior to either monolithic material alone. It has been shown that the Novelis Fusion™ interface is oxide fi lm and porosity free. This article analyzes the interplay of the aforementioned alloy combinations giving particular attention to the cast intermetallics, the diffusion of silicon and magnesium, the population of secondary phase particles (dispersoids) at the interface, and the rate of diffusion.

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Dilute Sn-Ge alloys were prepared as ribbons by meltspinning using a 4" copper drum. They were then transformed into grey tin at 242 K in the as-cast-condition, and after annealing. It is shown that germanium: (1) when in solid solution impedes β → α transformation; (2) when in solid solution cannot effect nucleation; and (3) has a solubility in α-Sn in excess of 1 wt. % Ge.In addition it is proposed that β → α transformation is restricted because the presence of germanium strengthens the β-Sn matrix.