Novel Ti-base superelastic alloys with large recovery strain and excellent biocompatibility

被引：122
作者：
Fu, Jie [1 ]
Yamamoto, Akiko [2 ]
Kim, Hee Young [1 ]
Hosoda, Hideki [3 ]
Miyazaki, Shuichi [1 ]
机构：
[1] Univ Tsukuba, Div Mat Sci, Tsukuba, Ibaraki 3058573, Japan
[2] Natl Inst Mat Sci, Int Ctr Mat Nanoarchitecton WPI MANA, Biomat Unit, Tsukuba, Ibaraki 3050044, Japan
[3] Tokyo Inst Technol, Precis & Intelligence Lab, Yokohama, Kanagawa 2268503, Japan
来源：
ACTA BIOMATERIALIA | 2015年 / 17卷
关键词：
Ti alloys; Superelasticity; Recovery strain; Recrystallization texture; SHAPE-MEMORY BEHAVIOR; MARTENSITIC-TRANSFORMATION; MECHANICAL-PROPERTIES; SN CONTENT; MICROSTRUCTURE; PHASE; ZR; DEFORMATION; TEMPERATURE; TEXTURE;
D O I：
10.1016/j.actbio.2015.02.001
中图分类号：
R318 [生物医学工程];
学科分类号：
0831 ;
摘要：
In this study, a new Ti-Zr-Nb-Sn alloy system was developed as Ni-free biomedical superelastic alloys with a large recovery strain and excellent biocompatibility. Ti-18Zr-(9-16)Nb-(0-4)Sn alloys were prepared by an Ar arc melting method and the effect of composition on the crystal structure and superelastic properties was investigated. A large superelastic recovery strain of 6.0% was observed in Ti-18Zr-12.5Nb-2Sn, Ti-18Zr-11Nb-3Sn, and Ti-18Zr-9.5Nb-4Sn alloys subjected to cold-rolling and solution treatment. XRD results showed that the large recovery strain of Sn-added alloys is due to a combination effect of a large transformation strain and a strong recrystallization texture. The Ti-18Zr-11Nb-3Sn alloy exhibited excellent cyclic stability with an extremely narrow stress hysteresis about 20 MPa. Cytocompatibility was also examined using three types of cell lines, murine fibroblast L929, human osteosarcoma SaOS-2, and human umbilical vein endothelial cell HUVEC and the results showed that the Ti-18Zr-11Nb-3Sn alloy exhibited larger cell covering ratios when compared with those of the Ti-50.5Ni alloy for all kinds of cells. (C) 2015 Acta Materialia Inc. Published by Elsevier Ltd. All rights reserved.
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页码：56 / 67
页数：12
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