Anomalous strengthening behavior of Co–Cr–Mo alloy single crystals for biomedical applications. (October 2016)

• Record Type: Journal Article
• Authors: Hagihara, Koji; Nakano, Takayoshi; Sasaki, Keita
• Is Part Of: Scripta materialia. Volume 123(2016)
• Page Start: 149
• Page End: 153
• Publication Date: 2016-10
• Subjects: Biomaterials -- Deformation structure -- Mechanical properties -- Compression test -- Co-Cr-Mo alloy; Materials -- Periodicals; Metallurgy -- Periodicals; Metalen; Legeringen; Materiaalkunde; Metals, metalworking and machinery industries; Metals; Electronic journals; 620.11
• DOI: 10.1016/j.scriptamat.2016.06.016
• Languages: English
• ISSNs: 1359-6462

Abstract

Abstract: This is the first repot on the deformation behavior of Co-Cr-Mo biomedical alloy single crystals predominantly having an fcc structure. In the single crystal, one of four ε-variants was selectively formed, and its geometry was found to drastically affect the mechanical properties. The yield stress in the [111] orientation, in which the formation of ε-phase strain-induced martensite (SIM) crosses the grown-in ε-variant, was more than six times larger than that in the [ 1 ̅ 49 ] orientation, where SIM was formed parallel to the grown-in ε-variant. The intersection mechanism of the ε-variants is discussed via observations of the deformation microstructure. Graphical abstract: