Microstructural Evolution During Superplastic Forming of Al-Li 8090 Alloy

Vivek Pancholi; B.P. Kashyap

doi:10.4028/www.scientific.net/MSF.702-703.374

Paper Titles

Texture and Correlation between R-Value and Formability of Aluminum Alloy Sheet
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Role of Texture in Understanding Creep Flow in HPT-Processed Ultrafine Grained Copper
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Texture Studies of Superplastically Deformed Electrodeposited Nanocrystalline Ni and Ni-P Alloy
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New Insights into Cube Nuclei in Deformed Aluminium
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Formation and Development of Strong Cube Recrystallization Texture in an Aluminium of Commercial Purity
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HomeMaterials Science ForumMaterials Science Forum Vols. 702-703Microstructural Evolution During Superplastic...

Microstructural Evolution During Superplastic Forming of Al-Li 8090 Alloy

Abstract:

Commercial grade AA8090 Al–Li alloy sheet contained three layers of distinct microstructural features along thickness direction. The surface layer contained well recrystallized equiaxed grains with higher fraction of T {4 4 11}, Cu {1 1 2}, H {0 0 1} and CH {0 0 1} texture components whereas middle layer contained unrecrystallized elongated grains with higher fraction of brass {0 1 1}, CG {0 2 1} and goss{0 1 1} texture components. Superplastic forming of the separated surface and middle layers was carried out at constant pressure. Microstructure and texture evolution was studied at different location of the formed bulge. The extent of texturing or anisotropy was calculated from standard deviation of texture estimated normal anisotropy (R) values, R_stdev. At all conditions, in both the surface and middle layers, the texture randomization was found to be more at the apex than that at the edge of the bulge. The overall reduction in texturing was predominantly accompanied by weakening in strong texture components and strengthening in the weaker ones.

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Periodical:

Materials Science Forum (Volumes 702-703)

Pages:

374-377

DOI:

https://doi.org/10.4028/www.scientific.net/MSF.702-703.374

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Online since:

December 2011

Authors:

Vivek Pancholi, B.P. Kashyap

Keywords:

8090 Al-Li Alloy, Superplastic Forming, Texture

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