Precipitate phases and mechanical properties of heat- Treated ASTM F 90 Co-Cr-W-Ni alloy

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

6 Citations (Scopus)

Abstract

The precipitation behavior during heat treatment and resulting mechanical properties of ASTM F 90 Co-20Cr-15W-10Ni (mass%) alloys were investigated with regards to their biomedical applications. Heat treatment was conducted at temperatures of 873 to 1623 K, for a holding time of 259.2 ks. The precipitates produced were then electrolytically extracted from the alloys and analyzed by X-ray diffraction (XRD). This revealed that the precipitates formed were an M23X6 type and/or η-phase (i.e., an M 6X-M12X type). The M23X6- Type precipitate was detected across the entire heat- Treatment temperature range; however, the η-phase precipitate was only detected at 1073 to 1473 K, becoming dominant at 1173 to 1373 K. The formation of M23X 6 type precipitates at 873 K is shown to improve the mechanical properties of this alloy, whereas the domination by the η-phase precipitate at higher temperatures causes deterioration in the ductility.

Original languageEnglish
Title of host publicationAdvanced Ceramics and Novel Processing
PublisherTrans Tech Publications Ltd
Pages258-262
Number of pages5
ISBN (Print)9783038351306
DOIs
Publication statusPublished - 2014 Jan 1
Event5th International Symposium on Advanced Ceramics, ISAC 2013 and 3rd International Symposium on Advanced Synthesis and Processing Technology for Materials, ASPT 2013 - Wuhan, China
Duration: 2013 Dec 92013 Dec 12

Publication series

NameKey Engineering Materials
Volume616
ISSN (Print)1013-9826
ISSN (Electronic)1662-9795

Other

Other5th International Symposium on Advanced Ceramics, ISAC 2013 and 3rd International Symposium on Advanced Synthesis and Processing Technology for Materials, ASPT 2013
CountryChina
CityWuhan
Period13/12/913/12/12

Keywords

  • ASTM F 90
  • Co-Cr-W-Ni alloy
  • Elongation
  • Hardness
  • Precipitates
  • Tensile strength

ASJC Scopus subject areas

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

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