Phase stability among the alpha(A1), beta(A2), and gamma(D8(3)) phases in the Cu-Al-X system
Liu, X. J.
Wang, C. P.
- 材料学院－已发表论文 
The phase equilibria among the alpha (A1), beta (A2), and gamma (D8(3)) phases in the Cu-Al-X systems (X: Ti, V, Mn, Fe, Co, Ni, Zn, Sn, and Sb) at 700 and 800 degreesC were investigated, and the effects of these alloying elements on the phase boundaries, homogeneous solid solution ranges, and tie-lines among the alpha, beta and gamma phases were accurately determined by the diffusion couple method. The phase stabilities among alpha, beta and gamma phases are discussed in terms of the partition coefficient. In addition, a modified Guillet's method, which is used to estimate the effect of alloying elements on microstructure, is proposed by taking into account the change of equivalent coefficient with the phase fraction, and applied to predict the effect of alloying elements on the microstructure of the Cu-Al base alloy.