Dynamic strain aging in biomedical Co-Cr-Mo-based alloys with nitrogen doping

Kenta Yamanaka, Manami Mori, Yunping Li, Yuichiro Koizumi, Akihiko Chiba

Research output: Chapter in Book/Report/Conference proceedingConference contribution

1 Citation (Scopus)

Abstract

The plastic deformation behavior of a biomedical Co-29Cr-6Mo-0.2N (wt.%) alloy with a fully ? (fcc) matrix was studied by compression tests from room temperature to 1073 K. Serrated stress-strain curves caused by dynamic strain aging (DSA) was clearly observed at temperatures of 773-973 K at a strain rate of 10-4 s-1. Such a flow behavior was not observed significantly in other conditions. Electron backscatter diffraction (EBSD) analysis revealed that deformation microstructures with DSA occurrence exhibited a large lattice distortion over the grains, while local strain preferentially increased in the vicinity of grain boundaries in the specimen deformed at room temperature. Dislocations were dissociated into stacking faults (SFs) bounded by Shockley partial dislocations both before and after deformation; the DSA observed in this alloy would originate from the interactions between nitrogen atoms and the partial dislocations/SFs.

Original languageEnglish
Title of host publicationMaterials Integration
PublisherTrans Tech Publications Ltd
Pages141-145
Number of pages5
ISBN (Print)9783037853764
DOIs
Publication statusPublished - 2012 Jan 1
EventInt. Symposium of GCOE: Materials Integration, in Conjunction with the 2nd Int. Symposium on Advanced Synthesis and Processing Technology for Materials, ASPT 2011 and the 8th Materials Science School for Young Scientists, KINKEN-WAKATE 2011 - Sendai, Japan
Duration: 2011 Dec 12011 Dec 2

Publication series

NameKey Engineering Materials
Volume508
ISSN (Print)1013-9826
ISSN (Electronic)1662-9795

Other

OtherInt. Symposium of GCOE: Materials Integration, in Conjunction with the 2nd Int. Symposium on Advanced Synthesis and Processing Technology for Materials, ASPT 2011 and the 8th Materials Science School for Young Scientists, KINKEN-WAKATE 2011
CountryJapan
CitySendai
Period11/12/111/12/2

Keywords

  • Biomedical Co-Cr-Mo-based alloys
  • Dynamic strain aging
  • Microstructures
  • Plastic deformation behavior

ASJC Scopus subject areas

  • Materials Science(all)
  • Mechanics of Materials
  • Mechanical Engineering

Fingerprint Dive into the research topics of 'Dynamic strain aging in biomedical Co-Cr-Mo-based alloys with nitrogen doping'. Together they form a unique fingerprint.

  • Cite this

    Yamanaka, K., Mori, M., Li, Y., Koizumi, Y., & Chiba, A. (2012). Dynamic strain aging in biomedical Co-Cr-Mo-based alloys with nitrogen doping. In Materials Integration (pp. 141-145). (Key Engineering Materials; Vol. 508). Trans Tech Publications Ltd. https://doi.org/10.4028/www.scientific.net/KEM.508.141