Hostname: page-component-586b7cd67f-r5fsc Total loading time: 0 Render date: 2024-11-24T11:59:49.208Z Has data issue: false hasContentIssue false
  • English
  • Français

Effect of heat treatment on microstructure and mechanical properties of cast and directionally solidified high-Nb contained TiAl-based alloys

Published online by Cambridge University Press:  22 October 2015

Shulin Dong ,
Ruirun Chen ,
Jingjie Guo ,
Hongsheng Ding ,
Yanqing Su  and
Hengzhi Fu
Shulin Dong
Affiliation:
School of Materials Science and Engineering, Harbin Institute of Technology, Harbin, Heilongjiang 150001, China
Ruirun Chen*
Affiliation:
School of Materials Science and Engineering, Harbin Institute of Technology, Harbin, Heilongjiang 150001, China
Jingjie Guo
Affiliation:
School of Materials Science and Engineering, Harbin Institute of Technology, Harbin, Heilongjiang 150001, China
Hongsheng Ding
Affiliation:
School of Materials Science and Engineering, Harbin Institute of Technology, Harbin, Heilongjiang 150001, China
Yanqing Su
Affiliation:
School of Materials Science and Engineering, Harbin Institute of Technology, Harbin, Heilongjiang 150001, China
Hengzhi Fu
Affiliation:
School of Materials Science and Engineering, Harbin Institute of Technology, Harbin, Heilongjiang 150001, China
*
a)Address all correspondence to this author. e-mail: [email protected]
Get access

Abstract

Two kinds of heavy-alloying β-type TiAl-based alloys Ti44Al6Nb1.0Cr2.0V (A1) and Ti44Al6Nb1.0Cr2.0V0.15Y0.1B (A2) are newly designed. They are prepared by vacuum consumable melting (VCM) and cold crucible directional solidification (CCDS). Via the theoretical analysis and tentative experiment, five alternative heat treatment (HT) schedules are proposed and studied that the corresponding microstructure and room temperature (RT) tensile property are investigated, and finally the optimized HT schedules are acquired. After HT5 (heat preservation in β phase region and at 1290 °C, and then ladder cooling), A2 alloy cast by VCM exhibits a better tensile property with average elongation of 1.20%. For the two CCDS ingots, after HT3 (mainly annealing at 1280 °C), B2 phase and (B2 + γ) blocky morphology are reduced, the columnar grains and small angle lamellas are reserved, and the tensile property also has a moderate improvement.

Keywords

titanium aluminumheat treatmenttensile propertydirectional solidificationmicrostructure
Type
Articles
Information
Journal of Materials Research , Volume 30 , Issue 21 , 13 November 2015 , pp. 3331 - 3342
Copyright
Copyright © Materials Research Society 2015 

Access options

Get access to the full version of this content by using one of the access options below. (Log in options will check for institutional or personal access. Content may require purchase if you do not have access.)

Footnotes

Contributing Editor: Yang-T. Cheng

References

REFERENCES

Ding, X.F., Lin, J.P., Zhang, L.Q., Su, Y.Q., Wang, H.L., and Chen, G.L.: Lamellar orientation control in a Ti–46Al–5Nb alloy by directional solidification. Scr. Mater. 65, 61–64 (2011).Google Scholar
Schwaighofer, E., Clemens, H., Lindemann, J., Stark, A., and Mayer, S.: Hot-working behavior of an advanced intermetallic multy-phase γ-TiAl based alloy. Mater. Sci. Eng., A 614, 297–310 (2014).Google Scholar
Tian, S.G., Wang, Q., Yu, H.C., Sun, H.F., and Li, Q.Y.: Microstructure and creep behaviors of a high Nb–TiAl intermetallics compound based alloy. Mater. Sci. Eng. A 614, 338–346 (2014).Google Scholar
Weidner, A., Pyczak, F., and Biermann, H.: Scanning and transmission electron microscopy investigattions of defect arrangement in a two-phase γ-TiAl alloy. Mater. Sci. Eng., A 571, 49–56 (2013).Google Scholar
Yang, F., Tane, M., Lin, J.P., Song, Y.H., and Nakajima, H.: Pore formation and compressive deformation in porous TiAl–Nb alloys containing derectional pores. Mater. Des. 49, 755–760 (2013).Google Scholar
Kabir, M.R., Bartsch, M., Chernova, L., Kelm, K., and Wischek, J.: Correlations between microstructure and room temperature tensile behavior of a duplex TNB alloy for systematically heat treated samples. Mater. Sci. Eng., A 635, 13–22 (2015).Google Scholar
Ding, H.S., Chen, R.R., Guo, J.J., Bi, W.S., Xu, D.M., and Fu, H.Z.: Directional solidification of titanium alloys by electromagnetic confinement in cold crucible. Mater. Lett. 59, 741–745 (2005).Google Scholar
Niu, H.Z., Chen, Y.Y., Xiao, S.L., and Xu, L.J.: Microstructure evolution and mechanical properties of a novel beta γ-TiAl alloy. Intermetallics 31, 225–231 (2012).CrossRefGoogle Scholar
Xu, W.C., Shan, D.B., Zhang, H., Li, X.A., Zhang, Y.Z., and Nutt, S.: Effects of extrusion deformation on microstructure, mechanica properties and hot workability of β containing TiAl alloy. Mater. Sci. Eng., A 571, 199–206 (2013).Google Scholar
Niu, H.Z., Chen, Y.Y., Xiao, S.L., Kong, F.T., and Zhang, C.J.: High temperature deformation behaviors of Ti-45Al-2Nb-1.5V-1Mo-Y alloy. Intermetallics 19, 1767–1774 (2011).Google Scholar
Dong, S.L., Chen, R.R., Guo, J.J., Ding, H.S., Su, Y.Q., and Fu, H.Z.: Microstructure control and mechanical properties of Ti44Al6Nb1.0Cr2.0V alloy by cold crucible directional solidification. Mater. Sci. Eng., A 67, 67–74 (2014).Google Scholar
Yang, J.R., Chen, R.R., Ding, H.S., Guo, J.J., Han, J.C., and Fu, H.Z.: Mechanism and evolution of heat transfer in mushy zone during cold crucible directionally solidifying TiAl alloys. Int. J. Heat Mass Transfer 63, 216–223 (2013).Google Scholar
Ding, X.F., Lin, J.P., Zhang, L.Q., Su, Y.Q., and Chen, G.L.: Microstructural control of TiAl–Nb alloys by directional solidification. Acta Mater. 60, 498–506 (2012).Google Scholar
Ding, X.F., Lin, J.P., Zhang, L.Q., Song, X.P., and Chen, G.L.: Microstructures and mechanical properties of directionally solidified Ti-45Al-8Nb-(W, B, Y) alloys. Mater. Des. 32, 395–400 (2011).Google Scholar
Song, L., Zhang, L.Q., Xu, X.J., Sun, J., and Lin, J.P.: Omega phase in as-cast high-Nb-containing TiAl alloy. Scr. Mater. 68, 929–932 (2013).Google Scholar
Peng, C.Q., Huang, B.Y., and Tang, J.C.: Formation of fine fully-lamellar microstructure of TiAl-based alloy in rapid heating cyclic heat treatment process. Trans. Nonferrous Met. Soc. China 11, 649–654 (2001).Google Scholar
Yang, J., Wang, J.N., Xia, Q.F., and Wang, Y.: Effect of cooling rate on the grain refinement of TiAl-based alloys by rapid heat treatment. Mater. Lett. 46, 193–197 (2000).CrossRefGoogle Scholar
Xia, Q.F., Wang, J.N., Wang, Y., and Yang, J.: Effect of heating rate on the grain refinement of a TiAl alloy by cyclic heat treatment. Mater. Sci. Eng., A 300, 309–311 (2000).CrossRefGoogle Scholar
Dong, S.L., Chen, R.R., Guo, J.J., Ding, H.S., Su, Y.Q., and Fu, H.Z.: Effect of power on microstructure and mechanical properties of Ti44Al6Nb1.0Cr2.0V0.15Y0.1B alloy prepared by cold crucible directional solidification. Mater. Des. 67, 390–397 (2015).CrossRefGoogle Scholar
Yang, J.R., Chen, R.R., Ding, H.S., Guo, J.J., Han, J.C., and Fu, H.Z.: Heat transger and macrostructure formation of Nb containing TiAl alloy directionally solidified by square cold crucible. Intermetallics 42, 184–191 (2013).Google Scholar
Sun, F.S., Cao, C.X., Kim, S.E., Lee, Y.T., and Yan, M.G.: Alloying mechanism of beta stabilizers in a TiAl alloy. Metall. Mater. Trans. A 32A, 1573–1589 (2001).CrossRefGoogle Scholar
Zhong, H., Yang, Y.L., Li, J.S., Wang, J., Zhang, T.B., Li, S., and Zhang, J.: Influence of oxygen on microstructure and phase transformation in high Nb containing TiAl alloys. Mater. Lett. 83, 198–201 (2012).Google Scholar
Oehring, M., Stark, A., Paul, J.D.H., Lippmann, T., and Pyczak, F.: Microstructural refinement of boron-containing β-solidifying γ-titanium aluminide alloys through heat treatments in the β phase field. Intermetallics 32, 12–20 (2013).Google Scholar
Xu, X.J., Lin, J.P., Teng, Z.K., Wang, Y.L., and Chen, G.L.: On the microsegregation of Ti-45Al-(8-9)Nb-(W, B, Y) alloy. Mater. Lett. 61, 369–373 (2007).CrossRefGoogle Scholar
Chen, R.R., Dong, S.L., Guo, J.J., Ding, H.S., Su, Y.Q., and Fu, H.Z.: Deformation behavior and microstructural evolution of directionally solidified TiAlNb-based alloy during thermo-compression at 1373–1573K. Mater. Des. 84, 118–132 (2015).Google Scholar
Gosslar, D., Günther, R., Hecht, U., Hartig, C., and Bormann, R.: Grain refinement of TiAl-based alloys: The role of TiB2 crystallography and growth. Acta Mater. 58, 6744–6751 (2010).Google Scholar
Hu, D., Yang, C., Huang, A., Dixon, M., and Hecht, U.: Grain refinement in beta-solidifying Ti44Al8Nb1B. Intermetallics 23, 49–56 (2012).Google Scholar
Hu, D., Yang, C., Huang, A., Dixon, M., and Hecht, U.: Solidification and grain refinement in Ti45Al2Mn2Nb1B. Intermetallics 22, 68–76 (2012).Google Scholar
Genc, A., Banerjee, R., Hill, D., and Fraser, H.L.: Structure of TiB precipitates in laser deposited in situ Ti-6Al-4V-TiB composites. Mater. Lett. 60, 859–863 (2006).Google Scholar
Banerjee, R., Genc, A., Hill, D., Collins, P.C., and Fraser, H.L.: Nanoscale TiB precipitates in laser deposited Ti-matrix composites. Scr. Mater. 53, 1433–1437 (2005).Google Scholar
Yang, J.R.: Heat Transfer of High Nb Containing TiAl Alloy and its Effect on Structure Formation in Cold Crucible Directional Solidification (Harbin Institute of Technology, Harbin, 2013); p. 129.Google Scholar
Yang, H.M.: Study on Microstructure Evolution of Ternary TiAl-5Nb Alloy During Directional Solidification (Harbin Institute of Technology, Harbin, 2010); p. 57.Google Scholar
Huang, L., Liaw, P.K., Liu, C.T., Liu, Y., and Huang, J.S.: Microstructural evolution of (TiAl)+Nb+W+B alloy. Trans. Nonferrous Met. Soc. China 21, 2192–2198 (2011).Google Scholar
Nam, C.Y., Oh, M.H., Kumar, K.S., and Wee, D.M.: Effect of nitrogen on the mean lamellar thickness of fully lamellar TiAl alloys. Scr. Mater. 46, 441–446 (2002).Google Scholar