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

被引：93

作者：

Lee, Sang-Hak ^{[1
]}

Nomura, Naoyuki ^{[2
]}

Chiba, Akihiko ^{[3
]}

机构：

[1] Iwate Ind Promot Ctr, Morioka, Iwate 0200852, Japan

[2] Tokyo Med & Dent Univ, Inst Biomat & Bioengn, Tokyo 1010062, Japan

[3] Tohoku Univ, Inst Mat Res, Sendai, Miyagi 9808577, Japan

来源：

MATERIALS TRANSACTIONS | 2008年 / 49卷 / 02期

关键词：

cobalt chromium molybdenum alloy; biomaterial; casting; nitrogen;

D O I：

10.2320/matertrans.MRA2007220

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

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 gamma phase stabilization and inhibition of the a phase formation due to N addition. Increasing the Cr content also has contributed to the improved mechanical properties.

引用

页码：260 / 264

页数：5

共 21 条

[1]

BLOSSEY RG, 1966, T METALL SOC AIME, V236, P28

[2] Cytokine release in mononuclear cells of patients with Co-Cr hip prosthesis [J].