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HomeMaterials Science ForumMaterials Science Forum Vols. 838-839Effect of Different Proportion of Coarse and Fine...

Effect of Different Proportion of Coarse and Fine Grain Microstructure on Superplastic Forming Characteristics

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Abstract:

The study was carried out to understand the effect of inhomogeneous microstructure on thickness variation in superplastically formed bulge. Friction stir processing was performed at rotational and traverse speeds of 720rpm and 155mm/min respectively on a 6mm sheet maintaining 50% overlap on the retreating side. Different probe dimensions were selected to obtain different proportions of fine grained stir zone in thickness direction. The proportions of the fine grained stir zone were 25%, 50%, 72% and, 100%. The sheets containing inhomogeneous microstructure were subjected to superplastic bulge forming under constant gas pressure up to a bulge height of 23.5mm. The sheet which was processed with 72% fine grains showed lower thickness variation from edge to apex and the bulge shape in this condition was close to the ideal spherical profile.

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Periodical:

Materials Science Forum (Volumes 838-839)

Pages:

528-533

DOI:

https://doi.org/10.4028/www.scientific.net/MSF.838-839.528

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Online since:

January 2016

Authors:

Vivek Pancholi*, K. Rohit, A. Raja

Keywords:

Bulge Forming, FSP, Superplasticity, Thinning Factor

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© 2016 Trans Tech Publications Ltd. All Rights Reserved

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[1] R. S. Mishra and Z. Y. Ma, Friction stir welding and processing. Mater. Sci. Eng. R. 50 (2005) 1–78.

[2] L. B. Johannes and R. S. Mishra, Multiple passes of friction stir processing for the creation of superplastic 7075 aluminum. Mater. Sci. Eng. A. 464 (2007) 255–260.

DOI: 10.1016/j.msea.2007.01.141

[3] Z. Y. Ma, F. C. Liu, and R. S. Mishra, Superplastic deformation mechanism of an ultrafine-grained aluminum alloy produced by friction stir processing. Acta Mater. 58 (2010) 4693–4704.

DOI: 10.1016/j.actamat.2010.05.003

[4] G.C. Cornfield and R.H. Johnson, The forming of superplastic sheet metal. 12 (1970) 479–490.

[5] D. L. Holt, An analysis of the bulging of a super plastic sheet by lateral pressure. 12 (1970) 491–497.

[6] A. K. Ghosh and C. H. Hamilton, Influences of material parameters and microstructure on superplastic forming. Metall. Trans. A, 13A (1982) 733 - 743.

DOI: 10.1007/bf02642386

[7] N. Cappetti, A method for setting variables in Super Plastic Forming process. 38 (2010) 187–194.

[8] M. Sedighi and M. Moattari, Investigation of process parameters in superplastic free bulge forming. Aircr. Eng. Aerosp. Technol. 83 (2011) 208–212.

DOI: 10.1108/00022661111138611

[9] V. Pancholi and B. Kashyap, Effect of local strain distribution on concurrent microstructural evolution during superplastic deformation of Al–Li 8090 alloy. Mater. Sci. Eng. A. 351 (2003) 174–182.

DOI: 10.1016/s0921-5093(02)00849-3

[10] S. Pradeep and V. Pancholi, Superplastic Forming of Multipass Friction Stir Processed Aluminum-Magnesium Alloy. Metall. Mater. Trans. A. 45 (2014) 6207–6216.

DOI: 10.1007/s11661-014-2573-x

[11] W. Fan, B. P. Kashyap, and M. C. Chaturvedi, Anisotropy in flow and microstructural evolution during superplastic deformation of a layered-microstructured AA8090 Al-Li alloy. Mater. Sci. Eng. A. 349 (2003) 166–182.

DOI: 10.1016/s0921-5093(02)00752-9

[12] S. Rhaipu, The effect of microstructural gradients on superplastic forming of Ti–6Al–4V. Journal of Materials Processing Technology. 80–81(1998) 90–95.

DOI: 10.1016/s0924-0136(98)00179-4

[13] B. P. Kashyap, W. Fan, and M. C. Chaturvedi, Microtextural evolution during superplastic deformation of AA 8090 Al–Li alloy. Materials Science and Technology. 17 (2001) 237–248.

DOI: 10.1179/026708301773002905

[14] V. Pancholi and B. P. Kashyap, Effect of layered microstructure on superplastic forming property of AA8090 Al-Li alloy. J. Mater. Process. Technol. 186 (2007) 214–220.

DOI: 10.1016/j.jmatprotec.2006.12.036

[15] S. Pradeep and V. Pancholi, Effect of microstructural inhomogeneity on superplastic behaviour of multipass friction stir processed aluminium alloy. Materials Science & Engineering A. 561 (2013) 78–87.

DOI: 10.1016/j.msea.2012.10.050

[16] H. S. Yang and A. K. Mukherjee, An analysis of the superplastic forming circular sheet diaphragm. 34 (1992) 283–297.

DOI: 10.1016/0020-7403(92)90036-g

[17] G. Dieter and D. Bacon, Mechanical Metallurgy, McGrawHill Shoppenhangers Road Maidenhead Berkshire SL2 2QL UK (1988).

[18] K. Chockalingam and M. Neelakantan, On the pressure forming of two superplastic alloys. J. Mater, Sci. 20 (1985) 1310–1320.

DOI: 10.1007/bf01026327