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Title: Dynamic recrystallization in adiabatic shear banding: Effective-temperature model and comparison to experiments in ultrafine-grained titanium

Journal Article · · International Journal of Plasticity

Dynamic recrystallization (DRX) is often observed in conjunction with adiabatic shear banding (ASB) in polycrystalline materials. The recrystallized nanograins in the shear band have few dislocations compared to the material outside of the shear band. In this work, we reformulate the recently-developed Langer-Bouchbinder-Lookman (LBL) continuum theory of polycrystalline plasticity and include the creation of grain boundaries. While the shear-banding instability emerges because thermal heating is faster than heat dissipation, recrystallization is interpreted as an entropic effect arising from the competition between dislocation creation and grain boundary formation. We show that our theory closely matches recent results in sheared ultrafine-grained titanium. The theory thus provides a thermodynamically consistent way to systematically describe the formation of shear bands and recrystallized grains therein.

Research Organization:
Los Alamos National Laboratory (LANL), Los Alamos, NM (United States)
Sponsoring Organization:
USDOE Laboratory Directed Research and Development (LDRD) Program; USDOE National Nuclear Security Administration (NNSA); USDOE/USDOD Joint Munitions Technology Development Program (JMP)
Grant/Contract Number:
AC52-06NA25396; 20170033DR
OSTI ID:
1467279
Report Number(s):
LA-UR-18-20413
Journal Information:
International Journal of Plasticity, Vol. 111; ISSN 0749-6419
Publisher:
ElsevierCopyright Statement
Country of Publication:
United States
Language:
English
Citation Metrics:
Cited by: 35 works
Citation information provided by
Web of Science

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Cited By (3)

Dislocation damage and adiabatic shear mechanisms of 7055 aluminum alloy during cutting process journal February 2020
Study on the hardness model of grinding for structural steel journal January 2020
Strain localization and dynamic recrystallization in polycrystalline metals: thermodynamic theory and simulation framework text January 2018

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