Significant Improvement in Mechanical Properties of Biomedical Co-Cr-Mo Alloys with Combination of N Addition and Cr-Enrichment

• Lee Sang-Hak

  Iwate Industrial Promotion Center

• Nomura Naoyuki

  Institute of Biomaterials and Bioengineering, Tokyo Medical and Dental University

• Chiba Akihiko

  Institute for Material Research, Tohoku University

Bibliographic Information

Other Title

• Significant improvement in mechanical properties of biomedical Co−Cr−Mo alloys with combination of N addition and Cr-enrichment
• Significant improvement in mechanical properties of biomedical Co–Cr–Mo alloys with a combination of N addition and Cr enrichment

Abstract

An improvement in the mechanical properties of a biomedical Ni-free Co-Cr-Mo alloy under as-cast condition has been examined by means of tensile tests and microstructure observations. The solubility of N in Co-Cr-Mo alloys increases with increasing Cr content from 29 to 34 mass%. This results in a significant improvement in mechanical properties such as yield stress, tensile strength, and fracture elongation. The improvement in the mechanical properties results from the γ phase stabilization and inhibition of the σ phase formation due to N addition. Increasing the Cr content also has contributed to the improved mechanical properties.

Journal

• MATERIALS TRANSACTIONS

  MATERIALS TRANSACTIONS 49 (2), 260-264, 2008

  The Japan Institute of Metals and Materials

Keywords

• cobalt chromium molybdenum alloy
• biomaterial
• casting
• nitrogen

Details

• CRID: 1390282679226587904
• NII Article ID: 10021144016
• NII Book ID: AA1151294X
• DOI: 10.2320/matertrans.mra2007220
• ISSN: 13475320
• ISSN: 13459678
• NDL BIB ID: 9354279
• Web Site: https://ndlsearch.ndl.go.jp/books/R000000004-I9354279
• Web Site: https://www.jstage.jst.go.jp/article/matertrans/49/2/49_MRA2007220/_pdf
• Text Lang: en
• Data Source:
  • JaLC
  • NDL
  • Crossref
  • CiNii Articles
• Abstract License Flag: Disallowed