Initial stage of dynamic recrystallization (DRX) under warm and hot deformation was investigated in polycrystalline copper. At the onset of DRX at intermediate deformation temperatures (i.e., high values of Zener–Hollomon parameter ) large orientation gradients are developed near grain boundaries, and conversely smaller gradients at high temperatures (i.e., low values). The frequency of thermally activated grain boundary motion coupled with various levels of local orientation gradients lead to the operation of different mechanisms of DRX nucleation. At warm deformation equiaxed grains with moderate- to high-angle boundaries are evolved at near the pre-existed boundary as a result of increasing density of geometrically necessary boundaries and progressive rotation of subgrains with little accompanying boundary migration, while at hot deformation grain boundary bulging accompanied with twinning takes place.
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July 2005
Research Papers
The New Grain Formation During Warm and Hot Deformation of Copper
Agnieszka M. Wusatowska-Sarnek
e-mail: agnieszka.wusatowska-sarnek@pw.utc.com
Agnieszka M. Wusatowska-Sarnek
(860) 565-0374
(860) 755-0012
Pratt and Whitney Co.
, 400 Main Street, M/S 114-40, East Hartford, CT 06108
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Agnieszka M. Wusatowska-Sarnek
(860) 565-0374
(860) 755-0012
Pratt and Whitney Co.
, 400 Main Street, M/S 114-40, East Hartford, CT 06108e-mail: agnieszka.wusatowska-sarnek@pw.utc.com
J. Eng. Mater. Technol. Jul 2005, 127(3): 295-300 (6 pages)
Published Online: March 16, 2005
Article history
Received:
August 13, 2004
Revised:
March 16, 2005
Citation
Wusatowska-Sarnek, A. M. (March 16, 2005). "The New Grain Formation During Warm and Hot Deformation of Copper." ASME. J. Eng. Mater. Technol. July 2005; 127(3): 295–300. https://doi.org/10.1115/1.1925284
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