Ti-Al-Nb三元系1 100 ℃等温截面的研究

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Abstract Seventeen Ti-Al-Nb alloy samples were prepared by arc melting, annealing at 1 100 ℃ for 1 080 h, quenching in ice water. Isothermal section of Ti-Al-Nb ternary system at 1 100 ℃ were studied using X-ray diffraction (XRD), scanning electron microscopy (SEM) and electron probe microanalysis (EPMA). Nine single-phase regions, fifteen two-phase regions and seven three-phase regions under the section (0-75%Al composition interval) were identified. The results show that, compared with the isothermal section of 1 100 ℃ obtained from the optimized calculation results of Witusiewicz and Cupid, there is a significant difference between experimental results (30-60%Al composition intervals) and the calculated results. The experimental results show that two three-phase α₂+β+γ and β+γ+σ regions and a two-phase β+γ region of the isothermal section of 1 100 ℃ are different from the calculated results.

Key words： TiAl alloy intermetallics phase diagram microstructure isothermal section

Received: 21 December 2017 Published: 12 July 2019

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	LI Lin
	LIU Libin
	ZHANG Ligang

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LI Lin,LIU Libin,ZHANG Ligang. Study on isothermal section of Ti-Al-Nb ternary system at 1 100 ℃[J]. Materials Science and Engineering of Powder Metallurgy, 2018, 23(4): 341-346.

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http://pmbjb.csu.edu.cn/EN/ OR http://pmbjb.csu.edu.cn/EN/Y2018/V23/I4/341

[1] POLLOCK T M.Alloy design for aircraft engines[J]. Nature Materials, 2016, 15(8): 809.
[2] DE Aragão B J, EBRAHIMI F. High temperature deformation of NbTiAl alloys with σ+γ microstructure[J]. Materials Science and Engineering A ,1996, 208(1): 37-46.
[3] KENEL C, LEINENBACH C.Influence of Nb and Mo on microstructure formation of rapidly solidified ternary Ti-Al-(Nb, Mo) alloys[J]. Intermetallics ,2016, 69(Supplement C): 82-89.
[4] CLEMENS H, WALLGRAM W, KREMMER S, et al.Design of novel β-solidifying TiAl alloys with adjustable β/B₂-phase fraction and excellent hot-workability[J]. Advanced Engineering Materials, 2008, 10(8): 707-713.
[5] KIM Y W.Ordered intermetallic alloys, part III: Gamma titanium aluminides[J]. JOM, 1994, 46(7): 30-39.
[6] SHULESHOVA O, HOLLAND-MORITZ D, LÖSER W, et al. In situ observations of solidification processes in γ-TiAl alloys by synchrotron radiation[J]. Acta Materialia, 2010, 58(7): 2408-2418.
[7] HOELZER D T, EBRAHIMI F.Phase stability of sigma+beta microstructures in the ternary Nb-Ti-Al system[J]. Mrs Proceedings, 1990, 194(Symposium R-Intermetallic Matrix Composites I): 393.
[8] CLEMENS H, MAYER S.Design, processing, microstructure, properties, and applications of advanced intermetallic TiAl alloys[J]. Advanced Engineering Materials, 2013, 15(4): 191-215.
[9] DIMIDUK D M.Gamma titanium aluminide alloys-an assessment within the competition of aerospace structural materials[J]. Materials Science & Engineering A, 1999, 263(2): 281-288.
[10] WU X.Review of alloy and process development of TiAl alloys[J]. Intermetallics, 2006, 14(10/11): 1114-1122.
[11] LEYENS C, PETERS M.Titanium and Titanium Alloys: Fundamentals and Applications[M]. Hoboken, N J, USA: J Been and J S Grauman, 2006: 401.
[12] LIU Y, CHEN L F, TANG H P, et al.Design of powder metallurgy titanium alloys and composites[J]. Materials Science & Engineering A, 2006, 418(1/2): 25-35.
[13] OHNUMA I, FUJITA Y, MITSUI H, et al.Phase equilibra in The Ti-Al binary system[J]. Acta Materialia, 2000, 48(12): 3113-3123.
[14] WITUSIEWICZ V T, BONDAR A A, HECHT U, et al.The Al-B-Nb-Ti system: III. Thermodynamic re-evaluation of the constituent binary system Al-Ti[J]. Journal of Alloys & Compounds, 2008, 465(1/2): 64-77.
[15] KATTNER U R, LIN J C, CHANG Y A.Thermodynamic assessment and calculation of the Ti-Al system[J]. Metallurgical Transactions A, 1992, 23(8): 2081-2090.
[16] KUMAR K C H, WOLLANTS P, DELAEY L. Thermodynamic calculation of Nb-Ti-V phase diagram[J]. Calphad, 1994, 18(1): 71-79.
[17] WITUSIEWICZ V T, BONDAR A A, HECHT U, et al.The Al-B-Nb-Ti system: II. Thermodynamic description of the constituent ternary system B-Nb-Ti[J]. Journal of Alloys & Compounds, 2008, 456(1): 143-150.
[18] WITUSIEWICZ V T, BONDAR A A, HECHT U, et al.The Al-B-Nb-Ti system: IV. Experimental study and thermodynamic re-evaluation of the binary Al-Nb and ternary Al-Nb-Ti systems[J]. Journal of Alloys & Compounds 2008, 472(1): 133-161.
[19] CUPID D M, FABRICHNAYA O, RIOS O, et al.Thermodynamic reassessment of the Ti-Al-Nb system[J]. International Journal of Materials Research, 2009, 100(2): 218-233.
[20] ANSARA I, DUPIN N, RAND M H.Thermochemical Database for Light Metal Alloys[M]. COST 507, vol. 2. European Commission, Luxembourg, 1998.
[21] SERVANT C, ANSARA I.Thermodynamic assessment of the Al-Nb-Ti system[J]. Berichte Der Bunsengesellschaft Für Physikalische Chemie,1998,102(9): 1189-205.
[22] SERVANT C, ANSARA I.Thermodynamic modelling of the order-disorder transformation of the orthorhombic phase of the Al-Nb-Ti system[J]. Calphad-computer Coupling of Phase Diagrams & Thermochemistry, 2001, 25(4): 509-525.
[23] ZHU Z, DU Y, ZHANG L, et al.Experimental identification of the degenerated equilibrium and thermodynamic modeling in the Al-Nb system[J]. Journal of Alloys & Compounds, 2008, 460(1): 632-638.