Phase transformations in the Cu-Al alloy with Ag addition

The effect of Ag addition on the phase transformations that occur in the Cu-10% Al alloy was studied using differential thermal analysis, scanning electron and optical microscopies and energy dispersive X-ray analysis. The results indicated that Ag addition is responsible for the separation of the reverse martensitic transformation in two stages, and for the refinement of the α-phase grains. The relative amount of the β1 martensitic phase, retained on slow cooling (above 2 K min-1 of cooling rate), and the relative fraction of phase α2 are increased. The solubility limit of Ag in the matrix is close to 6 mass% and at this concentration the maximum stability of the β-phase is reached. © 2005 Akadémiai Kiadó, Budapest.

Keywords

Ag addition, Cu-Al alloys, Phase transformations, Thermal behavior, Aluminum alloys, Cooling, Differential thermal analysis, Energy dispersive spectroscopy, Martensitic transformations, Optical microscopy, Phase transitions, Selenium, Separation, Silver, Thermal effects, Ci-Al alloys, Homogenization, Thermal behaviors, Copper alloys