Paper Titles
Superplastic Properties and Superplastic Forming/Diffusion Bonding of γ-TiAl+α2-Ti3Al Sheet Materials
p.441
Superplastic Properties of γ+α2 Titanium Aluminide Alloy Ti-43Al-(Nb,Mo,B) in Cast + Post-Solidification Heat Treated Condition
p.447
Heat Treatment of Ti2AlNb Intermetallic and its Superplastic Properties
p.453
Investigation of Compression Deformation Behavior and Microstructure Evolution of NiAl-Cr (Mo)-Hf Alloy at Elevated Temperature
p.457
A Study on Superplastic Behavior and Microstructural Evolution of an Isothermally Forged TiAl Based Alloy
p.463
Synthesis and Superplastic Deep Drawing of TiAl Alloy
p.467
Microstructures after Bending Deformations to Fracture of Zr Ion Irradiated Superplastic Ceramic 3Y-TZP
p.475
Superplastic Phenomenon in Sc2O3 Doped Zirconia Polycrystals to be Used for SOFC
p.481
Superplastic Sinter-Forging of Fine-Grained Si3N4-Si2N2O Composite at Low Temperature
p.487

A Study on Superplastic Behavior and Microstructural Evolution of an Isothermally Forged TiAl Based Alloy

Article Preview

Abstract:

Superplastic behavior and microstructure evolution of an isothermally forged Ti-47Al-1Cr-1V-1.5Mo-1.5Nb alloy were investigated. The results showed that the strain rate sensitivity index, m, increased with strain during the superplastic deformation, and it kept as a constant when the strain reached a certain value. The maximum value of m was 0.53 at 900°C and strain rate of 5x10-4 s-1. During the superplastic deformation, the as received material with lamellae and subgrains were refined due to dynamic recrystallization, and small and equiaxed grains with high angle boundaries were formed, creating a better condition for superplastic deformation. Grain boundary sliding and boundary migration were the main superplastic deformation mechanisms and slip and twining were also very important during the superplastic deformation of the alloy.

You might also be interested in these eBooks
Superplasticity in Advanced Materials - ICSAM 2006 View Preview

Info:

Periodical:

Materials Science Forum (Volumes 551-552)

Pages:

463-466

DOI:

https://doi.org/10.4028/www.scientific.net/MSF.551-552.463

Citation:

Cite this paper

Online since:

July 2007

Authors:

Hua Ding, D. Song, Z.Q. Pan, C.P. Zhang, J.Z. Cui

Keywords:

Isothermal Forging, Superplasticity, TiAl-Based Alloy

Export:

RIS, BibTeX

Price:

Permissions CCC:

Request Permissions

Permissions PLS:

Request Permissions

Сopyright:

© 2007 Trans Tech Publications Ltd. All Rights Reserved

Share:

Citation:

References

[1] G.Q. Wu and Z. Huang: Scripta Mater., Vol. 45 (2001), p.895.

Google Scholar

[2] J. Sun, Y.H. He and J.S. Wu: Mater. Sci. Eng., Vol. A329-331 (2002), p.885.

Google Scholar

[3] D.L. Lin and F. Sun: Intermetallics, Vol. 12 (2004), p.875.

Google Scholar

[4] T.G. Nieh, J.N. Wang, L.M. Hsiung, J. Wadsworth and V. Sikka: Scripta Mater., Vol. 37 (1997), p.773.

Google Scholar

[5] M.R. Shagiev, O.N. Senkov, G.A. Salishchev and F.H. Fores: J. of Alloy and Compound, Vol. 313 (2000), p.201.

Google Scholar

[6] R.M. Imayev, V.M. Imayev, M.R. Shagiev, A.V. Kuznetsov, R.M. Imayev, O.N. Senkov and F.H. Froes: Scripta Mater., Vol. 40, (1999), p.183.

DOI: 10.1016/s1359-6462(98)00419-9

Google Scholar

[7] M. Yamagichi, Y. Umakoshi eds., S. S. Ding trans.: Intermetallics (Science Press, Beijing 1999).

Google Scholar

[8] H.C. Fu, J.C. Huang, T.D. Wang and C.C. Bampton: Acta Mater., Vol. 46 (1998), p.465.

Google Scholar

[9] X.H. Li, X.Q. Liu, Q. Liu and M. Rao: Chinese J. of Mater. Res., Vol. 9 (1995), p.25.

Google Scholar

[10] G.L. Cheng, J.P. Lin: Fundamentals of physical metallurgry in orderd intermetallics structural materials (Metallurgy publishing company, Beijing 1999).

Google Scholar