Production and mechanical behaviour of biomedical CoCrMo alloy

ŞAHİN Ö., Tuncdemir A. R., Cetinkara H. A., Guder H. S., Sahin E.

Chinese Physics Letters, cilt.28, sa.12, 2011 (SCI-Expanded) identifier

  • Yayın Türü: Makale / Tam Makale
  • Cilt numarası: 28 Sayı: 12
  • Basım Tarihi: 2011
  • Doi Numarası: 10.1088/0256-307x/28/12/126201
  • Dergi Adı: Chinese Physics Letters
  • Derginin Tarandığı İndeksler: Science Citation Index Expanded (SCI-EXPANDED), Scopus
  • Hatay Mustafa Kemal Üniversitesi Adresli: Evet

Özet

Cobalt-based alloy (Co-30Cr-5.5Mo) is produced by the investment casting process. This alloy complies with the ASTM F75 standard and is widely used in the manufacturing of orthopedic implants because of its high strength, good corrosion resistance and excellent biocompatibility properties. SEM, XRD and microhardness tests are used to examine the mechanical properties of the material. The examined material exhibits the behaviour of indentation size effect (ISE). Our results reveal that Vickers and Knoop microhardness are dependent on indentation test load. The traditional Meyer's law, the proportional specimen resistance (PSR) model and the Hays-Kendall model (HK) are used to analyze the load dependence of the hardness. As a result, the Hays-Kendall model is found to be the most effective to determine the load-independent hardness HLI of CoCrMo alloy. © 2011 Chinese Physical Society and IOP Publishing Ltd.