ISSN 2594-5327
52º Congresso anual — Vol. 52 , num. 1 (1997)
Título
Autoria
DOI
Downloads
Resumo
The Cu-Al equilibrium diagram shows in the range 58–70 at.%Cu three phases, γ₁, δ and probably γ₀, with structures based on that of the γ-brass. For the Cu-13 wt.%Al alloy, when quenched from temperatures in the range of 790 to 850 °C, a square-shaped phase together with the martensitic structure was observed. In order to delimitate the temperature and composition range where this square-shaped phase is observed, Cu-Al alloys with compositions of 11 to 15 wt.%Al were prepared. This phase was characterized by SEM, EDX, TEM and X-ray diffraction. The results indicated two regions, monocrystalline grains in a polycrystalline matrix. The EDX analysis showed no appreciable Al-concentration difference inside and outside the squares. The square-shaped structure was observed for Cu-Al alloys with 13.1 to 15 wt.%Al in the temperature range between 790 and 850 °C which is quite close to that provisionally proposed for the β + γ₀ region.
The Cu-Al equilibrium diagram shows in the range 58–70 at.%Cu three phases, γ₁, δ and probably γ₀, with structures based on that of the γ-brass. For the Cu-13 wt.%Al alloy, when quenched from temperatures in the range of 790 to 850 °C, a square-shaped phase together with the martensitic structure was observed. In order to delimitate the temperature and composition range where this square-shaped phase is observed, Cu-Al alloys with compositions of 11 to 15 wt.%Al were prepared. This phase was characterized by SEM, EDX, TEM and X-ray diffraction. The results indicated two regions, monocrystalline grains in a polycrystalline matrix. The EDX analysis showed no appreciable Al-concentration difference inside and outside the squares. The square-shaped structure was observed for Cu-Al alloys with 13.1 to 15 wt.%Al in the temperature range between 790 and 850 °C which is quite close to that provisionally proposed for the β + γ₀ region.
Palavras-chave
Cu-Al alloys, gamma phase structure
Cu-Al alloys, gamma phase structure
Como citar
Hurtado, Maria do Rosário Fabeni; Ferrer, Juan Carlos; Adorno, Antonio Tallarico; Benedetti, Assis Vicente.
On the Square-Shaped Phase in Cu-Al Alloys with Composition in the Gamma Phase Region,
p. 3442-3469.
In: 52º Congresso anual,
São Paulo, Brasil,
1997.
ISSN: 2594-5327, DOI 10.5151/2594-5327-C00221-3442-3469
