Theoretical and Experimental Investigation on Forming Limit for TNW700 Titanium Alloy

Bao Sheng Liu; Wei Wu; Xiu Quan Han

doi:10.4028/www.scientific.net/KEM.622-623.340

Paper Titles

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Study of Formability of Steel Thick Plates for Offshore Structures
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Study on Hot-Working Behavior of High Carbon Steel / Low Carbon Steel Composite Material Using Processing Map
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Theoretical and Experimental Investigation on Forming Limit for TNW700 Titanium Alloy
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Effects of Nonconstant Strain Rate on Forming Limit and Efficiency in High Pressure Pneumatic Forming of Ti-Alloy Components
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Forming Limit Analyses of 590 MPa High Strength Steel Sheet Using Differential Work Hardening Model
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Formability Enhancement of Al-Mg Sheet by Using Hydro-Mechanical Forming
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HomeKey Engineering MaterialsKey Engineering Materials Vols. 622-623Theoretical and Experimental Investigation on...

Theoretical and Experimental Investigation on Forming Limit for TNW700 Titanium Alloy

Abstract:

Forming limit is identified to evaluate the formability of sheet metal. The in-plane limit strains of sheets are plotted in a diagram with coordinates of major strain vs. minor strain. TNW700 titanium alloy is a high temperature resistant material. The products made of TNW700 can be used in a long serving period at 500°C, short time at 700°C. In this work, the forming limit of TNW700 will be investigated in theoretical and experimental ways. The experiment to test limit strains was carried out at 750°C under different loading paths. Marciniak – Kuczynski (M-K) model was calculated with Swift constitutive equations to predict the curves of limit strains. The effect of the groove angle on forming limit is that, the same angle on both sides of centerline determines the same FLC, and the limit points shift from left side to right side. The experiment shows that, the formability of TNW700 is not excellent, and it is lower than that of TC4 and TA15 at the same condition. The comparison shows that the curve predicted by M-K model is in a good agreement with that at plane strain, however higher than that in both sides. The fractographic observation shows that the fracture mode of TNW700 is dimple rupture.

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Periodical:

Key Engineering Materials (Volumes 622-623)

Pages:

340-346

DOI:

https://doi.org/10.4028/www.scientific.net/KEM.622-623.340

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Online since:

September 2014

Authors:

Bao Sheng Liu*, Wei Wu, Xiu Quan Han

Keywords:

Forming Limit, Fracture Mechanism, M-K, TNW700 Titanium Alloy

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* - Corresponding Author

References

[1] E. Hus, J. E. Carsley, R. Verma. Development of forming limit diagrams of aluminum and magnesium sheet alloys at elevated temperature, Journal of Material Engineering and Performance. 17 (2008), 288-296.

DOI: 10.1007/s11665-007-9196-y

Google Scholar

[2] Z. Marciniak, K. Kuczynski. Limit strains in the processes of stretch - forming sheet metal, International Journal of Mechanical Science. 9 (1967), 609-620.

DOI: 10.1016/0020-7403(67)90066-5

Google Scholar

[3] R. Hill. A theory of the yielding and plastic flow of anisotropic metals, Proceedings of the Royal Society of London Series A. 193 (1948) 281-297.

DOI: 10.1098/rspa.1948.0045

Google Scholar

[4] J. M. Allwood, D. R. Shouler. Generalised forming limit diagrams showing increased forming limits with non-planar stress states, International Journal of Plasticity. 25 (2009) 1207-1230.

DOI: 10.1016/j.ijplas.2008.11.001

Google Scholar