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

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• 作者：Julien Favre (1)
  Yuichiro Koizumi (2)
  Akihiko Chiba (2)
  Damien Fabregue (1)
  Eric Maire (1)
  
• 刊名：Metallurgical and Materials Transactions A
• 出版年：2013
• 出版时间：June 2013
• 年：2013
• 卷：44
• 期：6
• 页码：2819-2830
• 全文大小：1421KB
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• 作者单位：Julien Favre (1)
  Yuichiro Koizumi (2)
  Akihiko Chiba (2)
  Damien Fabregue (1)
  Eric Maire (1)
  
  1. INSA de Lyon, MATEIS CNRS UMR5510, Université de Lyon, Bat. B. Pascal, 5° étage, 7 Avenue Jean Capelle, 69621, Villeurbanne Cedex, France
  2. Institute for Materials Research, Tohoku University, 2-1-1 Katahira, Aoba-ku, Sendai, 980-8577, Japan
  
• ISSN：1543-1940

文摘

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?], and at high strain rates (strain rate ~10?s?). 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.