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Annealing of Deformed Materials Developed by Continuous/Discontinuous Dynamic Recrystallization

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Abstract:

Annealing behaviour was studied in deformed copper developed by continuous or discontinuous dynamic recrystallization (cDRX or dDRX). Pure copper was deformed to large strains by multi-directional forging at room temperature, resulting in an ultra-fine grained structure due to operation of cDRX. Subsequent annealing of such a fine-grained copper can be controlled mainly by grain growth accompanied with recovery and no texture change, that is continuous static recrystallization (cSRX). On the other hand, 4 kinds of static restoration processes operate during annealing of dDRXed copper, i.e. metadaynamic recovery and recystallization (mDRV and mDRX), and classical static recovery and recrystallization. The stable existence of mDRVed grains containing moderate dislocations leads to incomplete recrystallization even after a long period of annealing time. It is discussed how such various types of annealing processes, occurring in cDRXed or dDRXed matrices, can be connected with the characteristic nature of the deformed microstructures.

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Periodical:

Materials Science Forum (Volume 550)

Pages:

327-332

DOI:

https://doi.org/10.4028/www.scientific.net/MSF.550.327

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Online since:

July 2007

Authors:

Taku Sakai, Hiromi Miura

Keywords:

Annealing, Continuous, Copper (Cu), Discontinuous, Dynamic Recovery, Dynamic Recrystallization (DRX), Severe Plastic Deformation (SPD), Ultrafine Grained

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© 2007 Trans Tech Publications Ltd. All Rights Reserved

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