LI Juntao; HAO Shiming (Northeastern University; Shenyang 110006)
Cite this article:
LI Juntao; HAO Shiming (Northeastern University; Shenyang 110006). ^^α(α_2)/ PHASE EQUILIBRIA IN Ti-Al-Si SYSTEM. Acta Metall Sin, 1996, 32(11): 1171-1176.
Abstract The partial α(α2)/γ phase equilibria in Ti-Al-Si ternary system at low Si concentration were measured by EPMA and examined with thermodynamic analysis. The results show that the addition of Si in Ti-Al binary system results in the α(α2)/ (α(α2)+γ) phase boundary shifting to Ti-rich side, whereas the (α(α2)+γ/γ) phase boundary shifting little. Si has effect on refining lamellar microstructure and makes the lamellae coarsen difficultly. The Si solubility in α(α2) phase is higher than that in γ phase thereas Si is an αphase-forming element in Ti-Al binary system. A third phase Ti5Si3 appears in the system with Si addition up to 1 .0% (atomic fraction). Correspondent: LI Juntao, Department of Materials Science and Engineering, Northeastern University.Shenyang 110006
