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Thermomechanical processing

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posted on 2007-01-01, 00:00 authored by J J Jonas, Matthew BarnettMatthew Barnett, Peter HodgsonPeter Hodgson
The softening mechanisms associated with deformation processing are described in detail. These include: dynamic recovery (DRV), static recrystallization (SRX), dynamic recrystallization (DRX), and metadynamic dynamic recrystallization (MDRX) or postdynamic recrystallization. The precipitation of second phases, such as the carbonitrides in microalloyed steels, is considered, as is the interaction between precipitation and recrystallization. The modeling of the softening processes is outlined together with that of the rolling load and grain size. A distinction is drawn between rough rolling, which involves full recrystallization between passes, and finish rolling, in which case no recrystallization takes place, leading to “pancaking” of the microstructure. The effect of such pancaking on phase transformation and grain refinement in complex materials such as steels is described, together with that of cooling rate through the transformation. Some attention is also paid to intercritical and warm rolling as well as to the production of ultrafine grained materials. Next, the effect of thermomechanical processing on mechanical properties is considered. Texture formation during rolling is characterized for both face-centered cubic (fcc) and body-centered cubic (bcc) crystal structures and recent advances in thermomechanical processing, both theory and practice, are depicted briefly. Finally, the processing of nonferrous metals, such as aluminum and titanium alloys, is considered.

History

Title of book

Materials processing handbook

Chapter number

29

Pagination

733 - 758

Publisher

CRC Press

Place of publication

Boca Raton, Fla.

ISBN-13

9781420004823

ISBN-10

1420004824

Language

eng

Publication classification

B1.1 Book chapter

Copyright notice

2007, Taylor & Francis Group, LLC

Extent

31

Editor/Contributor(s)

Joanna Groza, James Shackleford, Enrique Lavernia, Michael Powers

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