Hot Deformation and Dynamic Recrystallization in Titanium Aluminide

Nitish Bibhanshu; Satyam Suwas

doi:10.4028/www.scientific.net/MSF.941.1391

Paper Titles

Effects of Heat Treatment on Unique Layered Microstructure and Tensile Properties of TiAl Fabricated by Electron Beam Melting
p.1366

Deformation Behavior of Fe-Al Single Crystals Containing Fe₂AlTi Precipitates
p.1372

Transport and Thermodynamic Properties of CeRu₂Al₁₀ Controlled by Pressure at around Critical Pressure
p.1378

Thermo-Mechanical Treatment of Titanium Based Layered Structures Fabricated by Blended Elemental Powder Metallurgy
p.1384

Hot Deformation and Dynamic Recrystallization in Titanium Aluminide
p.1391

Cryogenic Sheet Metal Forming - An Overview
p.1397

Development of an Optimised Shielding Strategy for Laser Beam Welding of Ti6Al2Sn4Zr2Mo
p.1404

Precipitation Kinetics of AA6082: An Experimental and Numerical Investigation
p.1411

Microstructure and Texture of MX20 after Conventional Rolling and Rolling from Twin Rolled Cast Strip
p.1418

HomeMaterials Science ForumMaterials Science Forum Vol. 941Hot Deformation and Dynamic Recrystallization in...

Hot Deformation and Dynamic Recrystallization in Titanium Aluminide

Abstract:

The hot workability of gamma titanium aluminide alloy, Ti-48Al-2V-2Nb, was assessed in the cast condition through a series of compression tests conducted over a range of temperatures (1000 to 1175 °C) and at the strain rate of 10 S^-1. The mechanism of dynamics recrystallization has been investigated from SEM Z-contrast images and from the Electron backscattered diffraction EBSD as well. It has been observed that volume fraction of the recrystallized grains increases with increasing the deformation temperature. The major volume fraction of the recrystallized grains was observed in the shear band which was forming at an angle 45 ̊ with respect to the compression direction. The mechanism of breaking of the laths and the region of the dynamic recrystallization were also investigated from the SEM Z-contrast image and EBSD. The dynamic recrystallization occurred in the region of the broken laths and shear bands. The breaking of the laths was because of the kinking of the lamellae. The shear band, kinked lamellae and dynamic recrystallized region where all investigated simultaneously.

You might also be interested in these eBooks

View Preview

Info:

Periodical:

Materials Science Forum (Volume 941)

Pages:

1391-1396

DOI:

https://doi.org/10.4028/www.scientific.net/MSF.941.1391

Citation:

Cite this paper

Online since:

December 2018

Authors:

Nitish Bibhanshu*, Satyam Suwas

Keywords:

Dynamic Recrystallization, EBSD, Gleeble, Hot Deformation, SEM Z-Contrast Image, Texture, Titanium Aluminide

Export:

RIS, BibTeX

Price:

Permissions:

Request Permissions

* - Corresponding Author

References

[1] T. Klein, M. Schachermayer, F. Mendez-Martin, T. Schöberl, B. Rashkova, H. Clemens, S. Mayer, Carbon distribution in multi-phase γ-TiAl based alloys and its influence on mechanical properties and phase formation, Acta Mater. 94 (2015) 205–213.

DOI: 10.1016/j.actamat.2015.04.055

Google Scholar

[2] A. Couret, G. Molénat, J. Galy, M. Thomas, Microstructures and mechanical properties of TiAl alloys consolidated by spark plasma sintering, Intermetallics. 16 (2008) 1134–1141.

DOI: 10.1016/j.intermet.2008.06.015

Google Scholar

[3] P.B. Trivedi, E.G. Baburaj, A. GenÃ§, L. Ovecoglu, S.N. Patankar, F.H. Froes, Grain-size control in Ti-48Al-2Cr-2Nb with yttrium additions, Metall. Mater. Trans. A Phys. Metall. Mater. Sci. 33 (2002) 2729–2734.

DOI: 10.1007/s11661-002-0395-8

Google Scholar

[4] A. Lasalmonie, Intermetallics: Why is it so difficult to introduce them in gas turbine engines?, Intermetallics. 14 (2006) 1123–1129.

DOI: 10.1016/j.intermet.2006.01.064

Google Scholar

[5] R.C. Sujata M., Sastry D.H., No Title, Intermetallics. 12 (2004) 691–697.

Google Scholar

[6] H. Liu, R. Rong, F. Gao, Y. Liu, Z. Li, Q. Wang, Hot Deformation Mechanisms of an As-Extruded TiAl Alloy with Large Amount of Remnant Lamellae, J. Mater. Eng. Perform. 26 (2017) 3151–3159.

DOI: 10.1007/s11665-017-2592-z

Google Scholar

[7] F. Appel, M. Oehring, J.D.H. Paul, C. Klinkenberg, T. Carneiro, Physical aspects of hot-working gamma-based titanium aluminides, Intermetallics. 12 (2004) 791–802.

DOI: 10.1016/j.intermet.2004.02.042

Google Scholar

[8] Y. Xia, S.D. Luo, X. Wu, G.B. Schaffer, M. Qian, The sintering densification, microstructure and mechanical properties of gamma Ti-48Al-2Cr-2Nb alloy with a small addition of copper, Mater. Sci. Eng. A. 559 (2013) 293–300.

DOI: 10.1016/j.msea.2012.08.100

Google Scholar

[9] I. Agote, J. Coleto, M. Gutiérrez, A. Sargsyan, M. García de Cortazar, M.A. Lagos, I.P. Borovinskaya, A.E. Sytschev, V.L. Kvanin, N.T. Balikhina, S.G. Vadchenko, K. Lucas, A. Wisbey, L. Pambaguian, Microstructure and mechanical properties of gamma TiAl based alloys produced by combustion synthesis + compaction route, Intermetallics. 16 (2008) 1310–1316.

DOI: 10.1016/j.intermet.2008.08.007

Google Scholar

[10] D. Hu, C. Yang, A. Huang, M. Dixon, U. Hecht, Grain refinement in beta-solidifying Ti44Al8Nb1B, Intermetallics. 23 (2012) 49–56.

DOI: 10.1016/j.intermet.2011.12.022

Google Scholar

[11] S.R. Dey, A. Morawiec, J.J. Fundenberger, A. Hazotte, E. Bouzy, Variant orientation distribution in a near-γ Ti-Al alloy with a lamellar microstructure, Solid State Phenom. 105 (2005) 145–150.

DOI: 10.4028/www.scientific.net/ssp.105.145

Google Scholar