On The Stability of Superplastic Deformation Using Nonlinear Wavelength Analysis

Mohammad Nazzal; Marwan K. Khraisheh

doi:10.4028/www.scientific.net/KEM.344.47

Paper Titles

Sheet Metal Forming - A New Kind of Forge for the Future
p.9

Finite Element Simulation of Forming, Joining and Strength of Sheet Components
p.21

Formability and Microstructure of AZ31 Magnesium Alloy Sheets
p.31

Experimental Procedure Definition for Evaluating the Formability at Warm Temperatures of AZ31 Magnesium Alloy
p.39

On The Stability of Superplastic Deformation Using Nonlinear Wavelength Analysis
p.47

On the Formability of Magnesium Alloy Sheets in Warm Conditions
p.55

Evaluation of the Annealing Temperature Effect on the Mechanical Properties of a IF Steel by Means of Physical Simulation
p.63

Microstructural Characterization of Thermo-Mechanical Treated TRIP Steels
p.71

Mechanical Properties and Plastic Anisotropy of the Quenchenable High Strength Steel 22MnB5 at Elevated Temperatures
p.79

HomeKey Engineering MaterialsKey Engineering Materials Vol. 344On The Stability of Superplastic Deformation Using...

On The Stability of Superplastic Deformation Using Nonlinear Wavelength Analysis

Abstract:

Optimum variable strain rate forming paths based on two multiscale deformation-based stability criteria are developed. The first criterion is based on Hart’s linear stability analysis while in the second criterion; we introduce a modified one dimensional nonlinear long wavelength analysis introduced by Hutchinson and Neale [7] based on the well known 2-D Marciniak-Kuczynski criterion. The stability criteria are calibrated for the AZ31 Mg alloy at 400 °C yielding two different variable strain rate forming paths. These paths show that the nonlinear wavelength analysis is more sensitive to strain rate sensitivity and results in larger attainable uniform strains than Hart’s approach especially at low strain rates. This result is demonstrated through finite element simulations of a deep rectangular box using pressure profiles derived from the two variable strain rate forming paths. The FE results clearly illustrate that Hart’s approach underestimates the amount of uniform deformation and therefore prolongs the forming time to prevent failure compared to the nonlinear analysis.

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Key Engineering Materials (Volume 344)

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47-54

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https://doi.org/10.4028/www.scientific.net/KEM.344.47

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Online since:

July 2007

Authors:

Mohammad Nazzal, Marwan K. Khraisheh

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AZ31 Mg Alloy, Finite Element Model (FEM), Stability Analysis, Superplastic Deformation

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References

[1] D.G. Sanders, Advances in Superplasticity and Superplastic Forming, The Minerals, Metals and Materials Society (2004), p.3.

Google Scholar

[2] C.H. Johnson, C.H. Hamilton, H.M. Zbib, Advances in Superplasticity and Superplastic Forming, The Minerals, Metals and Materials Society (1993), p.3.

Google Scholar

[3] X.D. Ding, H.M. Zbib, C.H. Hamilton, and A.E. Bayoumi, Journal of Materials Engineering and Performance Vol. 4(1995), p.474.

Google Scholar

[4] N.V. Thuramalla and M.K. Khraisheh, Transactions of NAMRI/SME Vol. 32 (2004), p.637.

Google Scholar

[5] E.W. Hart, Acta Metall. Vol 15 (1976), pp.351-355.

Google Scholar

[6] S. Sagat, D. Taplin, Metal Sci. Vol 10 (1976), p.94.

Google Scholar

[7] J. Hutchinson and K. Neale, Acta Metall. Vol. 25 (1977), p.839.

Google Scholar

[8] Z. Marciniak and K. Kuczynski, Int. J. Mech. Sci. Vol. 9 (1967), p.600.

Google Scholar

[9] C.H. Caceres, D.S. Acta Metall. Vol. 32 (1984), p.415.

Google Scholar

[10] M.J. Stowell, Metal Science Vol. 17 (1983), p.92.

Google Scholar

[11] J. Pilling and N. Ridley, Superplasticity in Crystalline solids, The Institute of Metals, London, UK, (1989).

Google Scholar

[12] F. Abu-Farha, M.K. Khraisheh, ASM Journal of Materials Engineering & Performance, Accepted, In Press (To appear in first quarter of 2007).

Google Scholar

[13] M.A. Nazzal, M.K. Khraisheh, and F.K. Abu-Farha, Journal of Materials Processing Technology, Submitted.

Google Scholar

[14] M.K. Khraisheh, F. Abu-Farha, M. Nazzal, K. Weinmann, Annals of the CIRP. Vol. 55/1 (2006), p.233.

DOI: 10.1016/s0007-8506(07)60405-3

Google Scholar

[15] M.A. Nazzal, M.K. Khraisheh, B.M. Darras, Journal of Materials Engineering and Performance Vol. 13 (2004), p.691.

Google Scholar