Deformation behavior and dynamic recrystallization of biomedical Co-Cr-W-Ni (L-605) alloy

Julien Favre, Yuichiro Koizumi, Akihiko Chiba, Damien Fabregue, Eric Maire

Research output: Contribution to journalArticlepeer-review

38 Citations (Scopus)

Abstract

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 C), strain rate <0.1 s-1], and at high strain rates (strain rate ∼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.

Original languageEnglish
Pages (from-to)2819-2830
Number of pages12
JournalMetallurgical and Materials Transactions A: Physical Metallurgy and Materials Science
Volume44
Issue number6
DOIs
Publication statusPublished - 2013 Jun

ASJC Scopus subject areas

  • Condensed Matter Physics
  • Mechanics of Materials
  • Metals and Alloys

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