Superplasticity of a Ti-48Al-2.3Cr-0.2Mo Alloy

Jun Hong Zhang; Guo Hui Xu; Ya Juan Xu; Yue Hui He

doi:10.4028/www.scientific.net/KEM.531-532.27

Paper Titles

Optimization of Organic Fibres%[Kevlar/Arobocel/Acrylic] in NAO Brake Pad Application and its Effect on Thermal Stability & Friction Characteristics
p.8

Influence of Heat Treatment and Deformation on the Phase-Structural State of Steel 30CrMnSiA
p.13

Fabrication and Properties of Poly(Ether Imide)/Poly(Vinyl Alcohol) Composite Ultrafiltration Membrane
p.18

Luminescent Properties of Eu³⁺-Doped BaGd₂ZnO₅ Phosphors for White LED
p.22

Superplasticity of a Ti-48Al-2.3Cr-0.2Mo Alloy
p.27

New Usage for Cyclotrimerization Reaction: A Facile Synthesis of 1,3,5-Triazine Derivatives
p.32

Preparation and Microwave Absorption Property of Nickel Spinel Ferrite
p.36

Influence of Silicon Texturization on the Photovoltaic Properties of CuPc/n-Si Hybrid Solar Cells
p.40

Typical Materials’ Abrasion Rules and Failure Lives Prediction of Key Parts for Breech Mechanism Based on Virtual Prototype
p.45

HomeKey Engineering MaterialsKey Engineering Materials Vols. 531-532Superplasticity of a Ti-48Al-2.3Cr-0.2Mo Alloy

Superplasticity of a Ti-48Al-2.3Cr-0.2Mo Alloy

Abstract:

Superplastic behaviors of a Ti-48Al-2.3Cr-0.2Mo alloy with the initial grain size of 0.6m, resulting from 3-steps forging, have been investigated at temperatures ranging from 950°C to 1100°C and at strain rates ranging from 810-5 s-1 to 210-4s-1. The elongations above 500% were obtained at 1050°C-1100°C. An maximum elongation of 566% was obtained at 1050°Cand at a strain rate of 810-5s-1. The flow softening and continuous strain hardening were observed in the curves of true stress-true strain, it is suggested dynamic recrystallization and high-density dislocation caused by pre-deformation are the reasons. By OA, TEM, microstructure evolutions during the deformation were observed. It is found that after superplastic deformation, the grain size become smaller, and the distribution of grain size become more uniform, the densities of dislocations become lower and the dislocations mainly distributed in the areas near grain triple junction. Grain boundary sliding accommodated by dislocation slip is the predominant deformation mechanism.

You might also be interested in these eBooks

View Preview

Info:

Periodical:

Key Engineering Materials (Volumes 531-532)

Pages:

27-31

DOI:

https://doi.org/10.4028/www.scientific.net/KEM.531-532.27

Citation:

Cite this paper

Online since:

December 2012

Authors:

Jun Hong Zhang, Guo Hui Xu, Ya Juan Xu, Yue Hui He

Keywords:

Dynamic Recrystallization (DRX), Superplasticity, TiAl Alloys

Export:

RIS, BibTeX

Price:

Permissions CCC:

Request Permissions

Permissions PLS:

Request Permissions

Сopyright:

Citation:

References

[1] F. H. Fores, C. Suryanarayana and D. Eliezer: J Mater Sci Vol. 27 (1992), p.5113.

Google Scholar

[2] P. Bartolotta, J. Barret, T. Kelly and R.Smashey: JOM Vol. 5 (1997), p.48.

Google Scholar

[3] T. S. Bieler: Annu Rev Mater Sci Vol.26 (1996), p.75.

Google Scholar

[4] R. M. Imayev, G. A. Salishchev, O. N. Senkov, V. M. Imayev, M. R. Shagiev, N. K. Gabdullin, A. V. Kuznetsov and F. H. Froes: Mater Sci and Eng Vol. A300 (2001), p.263.

DOI: 10.1016/s0921-5093(00)01813-x

Google Scholar

[5] T. G. Nieh and J. Wadsworth: Mater Sci Forum, Vol. 304-306 (1999), p.169.

Google Scholar

[6] R. Bohn, T. Klassen and R. Bormann: Intermetallic, Vol. 9 (2001), p.559.

Google Scholar

[7] W.B. Lee, H. S. Yang and A. K. Mukherjee: Mater Sci and Eng, Vol. A192/193 (1995), p.733.

Google Scholar

[8] K. Ameyama, H. Uno and M. Tokizane: Intermillics, Vol. 2 (1994), p.315.

Google Scholar

[10] K. Niinobe, Y. Tomoto, T. Tsujimoto and M. Nobuki: Mater Sci Forum, Vol. 304-306 (1999), p.201.

Google Scholar

[11] S. C. Cheng, J. Wolfenstine and O. D. Sherby: Metall Trans A, Vol. 23 A (1992), p.1509.

Google Scholar

[12] T. Takasugi, S. R. Kukawa and S. Hanada: Acta Metall. Mater, Vol. 40 (1992), p.1895.

Google Scholar

[13] M. S. Kim, S. Handa, S. Watanke and O. Izum: JIM, Vol. 30(1989), p.77.

Google Scholar