Thermodynamic modeling of the Ti–Al–Cr ternary system

• Published in: Journal of alloys and compounds Vol. 509; no. 5; pp. 1936 - 1946
• Main Authors: Chen, Le-Yi, Qiu, Ai-Tao, Liu, Lan-Jie, Jiang, Ming, Lu, Xiong-Gang, Li, Chong-He
• Format: Journal Article
• Language: English
• Published: Kidlington Elsevier B.V 03.02.2011; Elsevier
• Subjects: Calphad; Computer simulation; Cross-disciplinary physics: materials science; rheology; Descriptions; Exact sciences and technology; Intermetallic compounds; Invariants; Materials science; Mathematical models; Phase diagrams and microstructures developed by solidification and solid-solid phase transformations; Phase transformations; Physics; Ternary systems; Thermodynamics; Titanium; Titanium alloys; Ti–Al–Cr; Calphad; Titanium alloys; Ti–Al–Cr; Phase diagrams; Experimental data; Ternary systems; Binary systems; Aluminium; Experimental result; Reviews; Thermodynamic model; Isothermal section; Chromium; Phase equilibria; Titanium; Ti-Al-Cr
• ISSN: 0925-8388; 1873-4669
• DOI: 10.1016/j.jallcom.2010.10.092

▶ The full experimental results of the Ti–Al–Cr ternary system and its sub-binary systems are reviewed and analysed in detail. ▶ Based on the latest thermodynamic assessments of the Ti–Al, Ti–Cr and Al–Cr systems and the ternary experimental data in literature, the thermodynamic parameters of the Ti–Al–Cr ternary system are fully assessed by the Calphad method. ▶ The transformation of disorder to order (bcc_a2 to B2) and the new ternary compound L 12_Ti 25Cr 8Al 67 are considered in this work. The Ti–Al–Cr ternary system is one of the most important systems to studying the titanium alloys. Some experimental data of this ternary system are available and a few partial thermodynamic assessments are reported. However, no full thermodynamic descriptions were published. In this study, the previous work on the Ti–Al–Cr system and its related binary systems are reviewed. Based on the thermodynamic descriptions of the Ti–Al, Ti–Cr and Al–Cr systems and the ternary experimental data in literature, the Ti–Al–Cr ternary system is assessed by means of the Calphad method. Several isothermal sections from 1073 K to 1573 K and some invariant reactions are calculated, which are in good agreement with the most of the experimental results.