Plastic deformation mechanisms of biomedical Co-Cr-Mo alloy single crystals with hexagonal close-packed structure

SCRIPTA MATERIALIA

卷:142

Article

Kaita, Wataru¹  Hagihara, Koji²  Rocha, Luis Augusto^3,4,5  Nakano, Takayoshi¹ 

[1] Osaka Univ, Grad Sch Engn, Div Mat Sci & Engn, 2-1 Yamadaoka, Suita, Osaka 5650871, Japan

[2] Osaka Univ, Grad Sch Engn, Dept Adapt Machine Syst, 2-1 Yamadaoka, Suita, Osaka 5650871, Japan

[3] Univ Minho, Dept Mech Engn, Ctr MicroElectroMech Syst, Campus Azurem, P-4800058 Guimaraes, Portugal

[4] Univ Estadual Paulista UNESP, Inst Biomat Tribocorros & Nanomed, IBTN Br Brazilian Branch, Av Engn Luiz Edmundo Carrijo Coube, BR-17033360 Sao Paulo, Brazil

[5] Univ Estadual Paulista UNESP, Dept Fis, Fac Ciencias, Av Engn Luiz Edmundo Carrijo Coube, BR-17033360 Sao Paulo, Brazil

关键词: Biomaterials;    Co-Cr-Mo alloy;    Single crystal;    Deformation mode;    Dislocation;   

DOI  :  10.1016/j.scriptamat.2017.08.016

来源: Elsevier

【 摘 要 】

This is the first report of the successful fabrication of Co-Cr-Mo biomedical alloy single crystals with a hexagonal close-packed (hcp) structure and the resultant clarification of its deformation behavior. The (0001) < 11 (2) over bar0 > basal and {1 (1) over bar 00} < 11 (2) over bar0 > prismatic slip systems were found to be predominately operative. The critical resolved shear stresses for the basal and prismatic slip systems at ambient temperature are similar to 204 and similar to 272 MPa, respectively, which are much higher than similar to 54 MPa for {111} < 11 (2) over bar > slip in the face-centered cubic (fcc) Co-Cr-Mo phase, quantitatively demonstrating that the hcp phase acts as an effective strengthening phase. (C) 2017 Acta Materialia Inc. Published by Elsevier Ltd.

【 授权许可】

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