Paper Titles
Analysis of the Behavior of a Clad Material Al-Zinag-Al
p.337
The Activation Energy of Superplastic Flow above the Critical Temperature for Steel CrWMn
p.341
Scale Effects in the High Temperature Gas Pressure Forming of Electrodeposited Fine-Grained Copper Thin Sheet
p.347
Development of Superplastic Properties in Quasi Single Phase Alloys
p.357
High-Temperature Deformation Behavior of ELI Grade Ti-6Al-4V Alloy with Martensite Microstructure
p.365
Superplasticity in CP-Titanium Alloys
p.373
Microstructure Evolution of the Ti-6.62Al-5.14Sn-1.82Zr Alloy in the Superplastic Compression
p.379
The Effects of Extrusion Ratio and Friction on Material Microstructures during Sandglass Extrusion Process
p.383
The Effect of Grain Size on Superplastic Deformation of Ti-6Al-4V Alloy
p.387

High-Temperature Deformation Behavior of ELI Grade Ti-6Al-4V Alloy with Martensite Microstructure

Article Preview

Abstract:

High-temperature deformation behavior and microstructural evolution process of ELI Ti-6Al-4V alloy having martensite microstructure were investigated with the variation of strain, strain rate and temperature. A series of hot compression tests was carried out isothermally for martensite microstructure at the true strain range of 0.6 to 1.4, strain rate range of 10-3 s-1 to 1 s-1 and temperature range of 700 oC to 950 oC. The processing maps for martensite microstructures were constructed on the basis of dynamic materials model (DMM). At the strain rate higher than 10-2 s-1 and the temperature lower than 750 oC regions of flow instability such as adiabatic shear band and micro-cracking were observed. Also, after imposing an effective strain of ≈ 1.4, deformed microstructure showed the significant kinking/bending behavior of lamellae resulting in the dynamic globularization associated with the fragmentation of beta-phase. The effects of strain, strain rate and temperature for dynamic globularization were discussed based on the microstructure and efficiency of power dissipation.

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:

365-372

DOI:

https://doi.org/10.4028/www.scientific.net/MSF.551-552.365

Citation:

Cite this paper

Online since:

July 2007

Authors:

C.H. Park, Young Gun Ko, Chong Soo Lee, Kyung Tae Park, Dong Hyuk Shin, Ho Sung Lee

Keywords:

Dynamic globularization, Dynamic Materials Model, ELI Grade TI-6Al-4V Alloy, Martensite Microstructure

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] B.Y. Choi, J. Liang and W. Gao: Met. Mater. Int., Vol. 11, No. 6 (2005), P. 499.

Google Scholar

[2] E.B. Shell and S.L. Semiatin: Metall. Mater. Trans. A Vol. 30A (1999), p.3219.

Google Scholar

[3] J.H. Kim, S. L. Semiatin and C. S. Lee: Acta Mater Vol. 51 (2003), p.5613.

Google Scholar

[4] T. Seshacharyulu, S.C. Medeiros, W.G. Frazier and Y.V. R. K. Prasad: Mater. Sci. Eng A Vol. 325 (2002), p.112.

Google Scholar

[5] S.L. Semiatin, V. Seetharaman and I. Weiss: Mater. Sci. Eng A Vol. 263 (1999), p.257.

Google Scholar

[6] Y.G. Ko, C.S. Lee, D.H. Shin and S. L. Semiatin: Metall. Mater. Trans. A Vol. 37A (2006), P. 381.

Google Scholar

[7] Y. V. R. K. Prasad and T. Seshacharyulu: Inter. Mater. Reviews Vol. 43 (1998), p.243.

Google Scholar

[8] H. Ziegler: Progress in solid mechanics, (ed. I.N. Sneddon and R. Hill), New York, Wiley (1965) Vol. 4, p.91.

Google Scholar