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Article Dans Une Revue Metallurgical and Materials Transactions A Année : 2013

Deformation Behavior and Dynamic Recrystallization of Biomedical Co-Cr-W-Ni (L-605) Alloy

Résumé

The mechanical behavior of Co-20Cr-15W-10Ni alloy is studied by compression tests at high temperature. Microstructures after deformation are evaluated using SEM-EBSD. Significant grain refinement occurs by dynamic recrystallization for high temperatures and low strain rates [T > 1373 K (1100 A degrees C), strain rate < 0.1 s(-1)], and at high strain rates (strain rate similar to 10 s(-1)). Dynamic recrystallization is discontinuous and occurs by nucleation of grain boundaries, leading to a necklace-like structure. The nucleation mechanism is most likely bulging of grain boundaries. However, recrystallization occurs also by rotation of annealing twins, which can bulge as well. Modeling of the observed mechanical behavior gives a fair quantification of flow softening due to dynamic recrystallization, indicating the progress of dynamic recrystallization with deformation.

Dates et versions

hal-01500813 , version 1 (03-04-2017)

Identifiants

Citer

Julien Favre, Yuichiro Koizumi, Akihiko Chiba, D. Fabregue, Eric Maire. Deformation Behavior and Dynamic Recrystallization of Biomedical Co-Cr-W-Ni (L-605) Alloy. Metallurgical and Materials Transactions A, 2013, 44A (6), pp.2819-2830. ⟨10.1007/s11661-012-1602-x⟩. ⟨hal-01500813⟩
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