Study of Recovery and Recrystallisation in a Folded Al Alloy

Abstract:

Changes in the microstructure and crystallographic orientations during in-situ heating of folded Al 0.1%Mg have been followed by SEM and EBSD. The folding process results in both strain and texture gradients across the folded region which in turn can influence the recovery and recrystallisation processes as well as crystallographic texture. This work is an extension of ex-situ heating experiments on folded nickel 200, titanium and ferritic steel [1,2]. The present findings illustrates that during isothermal in-situ heating at 295oC nucleation and growth starts close to the surface where the deformation is highest, new grains form and grow in a region about quarter depth of the sheet thickness. After this grain growth occurs resulting in large grains that meet up at the centre line. These results are consistent with those found in ex-situ heated Ni200 alloy [2], where fine grains were found in the compressed and tensile regions with large grains in the middle of the sheet.

• Periodical: Materials Science Forum (Volume 753)
• Pages: 7-10
• DOI: https://doi.org/10.4028/www.scientific.net/MSF.753.7
• Online since: March 2013
• Authors: Harvinder Singh Ubhi, Ian Brough, Kim Larsen
• Keywords: Aluminum (Al), EBSD, Folded Sheet, In Situ Heating

References

[1] H S Ubhi and H Jiang, Materials Science Forum Vols. 715-716 (2010) pp.770-775.

[2] H S Ubhi and H Jiang, Materials Science Forum Vols. 702-703 (2012) pp.667-670:

[3] Y Zhang, A Godfrey and d Jull Jensen, Scripta Materialia 64 (2011) pp.331-334..

[4] L E Murr, Acta Metallurgica, 21,6 (1973)pp.791-797.

[5] J.W. Martin, R.D. Doherty and B Cantor: The Stability of Microstructure in Metallic Systems 2nd Ed. Cambridge University Press Cambridge UK (1996)

[6] N Kamikawa, X Hunag, Y Kondo, T Furuhara and N Hansen, Materials Science Forum Vols. 715-716(2012)pp.367-372

DOI: 10.4028/www.scientific.net/msf.715-716.367