TY - JOUR
T1 - Phase equilibria among α (hcp), β (bcc) and γ (L10) phases in Ti-Al base ternary alloys
AU - Kainuma, R.
AU - Fujita, Y.
AU - Mitsui, H.
AU - Ohnuma, I.
AU - Ishida, K.
N1 - Funding Information:
The authors wish to thank Dr. L. Chandrasekaran of DERA, Farnborough, UK for useful comments, reading and helping in the presentation of the manuscript for publication. This work was supported by the Grant-in-Aids for Scientific Research from the Ministry of Education, Science, Sports and Culture, Japan.
PY - 2000/8
Y1 - 2000/8
N2 - Phase equilibria between the α(A3), α2(D019), β(A2 or B2) and the γ(L10) phases in the Ti-Al base ternary systems were investigated over the temperature range 1000-1300 °C. The tie lines and the phase boundaries were determined by electron probe microanalysis using multiphase alloys. It was established that almost all the elements except Zr tended to partition into the β phase rather than into the α, α2 or the γ phase, while Zr mostly partitioned into the γ phase. At 1000 °C, in the equilibrium state between the α2 and the γ phases. V, Cr, Mo, Ta and W partitioned to the α2 phase rather than to the γ phase, whereas Mn, Fe, Co, Ni, Cu and Zr tended to concentrate into the γ phase. The partition coefficients for the alloying elements were only slightly dependent on their concentration. Based on these data, the relative stabilizing effects of alloying elements on the α, α2, β and γ phases are discussed.
AB - Phase equilibria between the α(A3), α2(D019), β(A2 or B2) and the γ(L10) phases in the Ti-Al base ternary systems were investigated over the temperature range 1000-1300 °C. The tie lines and the phase boundaries were determined by electron probe microanalysis using multiphase alloys. It was established that almost all the elements except Zr tended to partition into the β phase rather than into the α, α2 or the γ phase, while Zr mostly partitioned into the γ phase. At 1000 °C, in the equilibrium state between the α2 and the γ phases. V, Cr, Mo, Ta and W partitioned to the α2 phase rather than to the γ phase, whereas Mn, Fe, Co, Ni, Cu and Zr tended to concentrate into the γ phase. The partition coefficients for the alloying elements were only slightly dependent on their concentration. Based on these data, the relative stabilizing effects of alloying elements on the α, α2, β and γ phases are discussed.
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U2 - 10.1016/S0966-9795(00)00015-7
DO - 10.1016/S0966-9795(00)00015-7
M3 - Article
AN - SCOPUS:0034247947
VL - 8
SP - 855
EP - 867
JO - Intermetallics
JF - Intermetallics
SN - 0966-9795
IS - 8
ER -