Effect of Ag addition on phase transitions of the Cu-22.26 at.%Al-9.93 at.%Mn alloy
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The phase transitions that occur in the Cu-22.26 at.%Al-9.93 at.%Mn and Cu-22.49 at.%Al-10.01 at.%Mn-1.53 at.%Ag alloys after slow cooling were studied using differential scanning calorimetry at different heating rates, microhardness changes with temperature, magnetization changes with temperature, scanning electron microscopy and energy dispersion X-ray spectroscopy. The results indicated that the presence of Ag does not modify the transition sequence of Cu-Al-Mn alloy, introduces a new transition due to the (Ag-Cu)-rich precipitates dissolution at about 800 K, and changes the mechanism of DO 3 phase dissolution. This mechanistic change was analyzed and a sequence of phase transitions was proposed for the reaction. © 2013 Elsevier B.V.
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Metals and alloys, Phase transitions, Thermal analysis, Ag additions, Ag-alloy, Cu-Al-Mn alloy, Energy dispersions, Phase dissolution, Slow cooling, Transition sequences, Differential scanning calorimetry, Dissolution, Manganese, Metallurgy, Scanning electron microscopy, Silver, Silver alloys, Thermoanalysis, X ray spectroscopy, Aluminum
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Thermochimica Acta, v. 554, p. 71-75.
