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Solid-state hot pressing of elemental aluminum and titanium powders to form TiAl (γ + α2) intermetallic microstructure

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Abstract

The elemental powder metallurgy (EPM) process is used to prepare TiAl-base intermetallics. An EPM process conducted by two-stage solid-state hot pressing was employed to prepare TiAl-base intermetallics and to investigate the resulting microstructural changes. The results showed that the TiAl3 phase forms in the first stage. During the temperature increase to the second sintering stage, lamellar phases start to precipitate in the TiAl3 matrix. Further, the TiAl3 phase transforms to TiAl, and Ti3Al layers develop in the remaining titanium particles. Meanwhile, the lamellar phases grow into ring-type structures between the TiAl matrix and the Ti3 Al layers. After the second stage, the remaining titanium particles are fully reacted, and a microstructure of Ti3Al phases enclosed by fine-grained lamellar rings in the TiAl matrix is developed.

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References

  1. G.-X. Wang and M. Dahms, An Overview: TiAl-Based Alloys Prepared by Elemental Powder Metallurgy,Powder Metall. Int., Vol 24 (No. 4), 1992, p 219–225

    CAS  Google Scholar 

  2. G.-X. Wang and M. Dahms, Synthesizing Gamma-TiAl Alloys by Reactive Powder Process,J. Met., Vol 45 (No. 5), 1993, p 52–56

    CAS  Google Scholar 

  3. K. Shibue, Suppression of Pores for TiAl Intermetallic Compound Prepared by Reactive Sintering,Sumitomo Light Met. Tech. Rep., Vol 32 (No. 2), 1991, p 95–101

    CAS  Google Scholar 

  4. P.L. Sullivan, HIP Processing of Ti-Al Intermetallic Using Blended Elemental Powder,J. Mater. Process. Technol, Vol 38, 1993, p 1–13

    Article  Google Scholar 

  5. G.-X. Wang and M. Dahms, An Effective Method for Reducing Porosity in the Titanium Aluminide Alloy Ti52AI48 Prepared by Elemental Powder Metallurgy,Scr. Metall. Mater., Vol 26 (No.9), 1992, p 1469–1474

    Article  CAS  Google Scholar 

  6. M. Dahms, F. Schmelzer, J. Seeger, and B. Wildhagen, Microstructure and Mechanical Properties of γ Base Titanium Alu- minide Produced from Extruded Elemental Powders,Mater. Sci. Technol., Vol 8 (No. 4), 1992, p 359–362

    CAS  Google Scholar 

  7. J.C. Rawers and W. Wrzesinski, Heat Treatment of Reaction-Sintered Hot-Pressed TiAl,Scr. Metall. Mater., Vol 24 (No. 10), 1990, p 1985–1990

    Article  CAS  Google Scholar 

  8. G.-X. Wang and M. Dahms, Influence of Heat Treatment on Microstructure of Ti-35wt.%Al Prepared by Elemental Powder Metallurgy,Scr. Metall. Mater., Vol 26 (No. 5), 1992, p 717- 722

    Article  CAS  Google Scholar 

  9. F.J.J. van Loo and G.D. Rieck, Diffusion in the Titanium-Aluminium System, Part I: Interdiffusion between Solid Al and Ti or Ti-Al Alloys,Acta Metall., Vol 21 (No. 1), 1973, p 61–71

    Article  Google Scholar 

  10. F.J.J. van Loo and G.D. Rieck, Diffusion in the Titanium-Aluminium System, Part II: Interdiffusion in the Composition Range between 25 and 100 at% Ti,Acta Metall., Vol 21 (No. 1), 1973,p 73–84

    Article  Google Scholar 

  11. J.C. Rawers, W. Wrzesinski, E.K. Roub, and R.R. Broun, TiAl-SiC Composites Prepared by High Temperature Synthesis,Mater. Sci. Technol., Vol 6 (No. 2), 1990, p 187–191

    CAS  Google Scholar 

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Authors and Affiliations

  1. Department of Materials Science and Engineering, National Cheng Kung University, 70101, Tainan, Taiwan, Republic of China

    J.B Yang, K.W Teoh & W.S Hwang

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  1. J.B Yang
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  2. K.W Teoh
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  3. W.S Hwang
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Yang, J., Teoh, K. & Hwang, W. Solid-state hot pressing of elemental aluminum and titanium powders to form TiAl (γ + α2) intermetallic microstructure. JMEP 5, 583–588 (1996). https://doi.org/10.1007/BF02646085

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