Bimodal structured Ti-base alloy with large elasticity and low Young's modulus

被引：36
作者：
He, G [1 ]
Hagiwara, M [1 ]
机构：
[1] Natl Inst Mat Sci, Tsukuba, Ibaraki 3050047, Japan
来源：
MATERIALS SCIENCE & ENGINEERING C-BIOMIMETIC AND SUPRAMOLECULAR SYSTEMS | 2005年 / 25卷 / 03期
关键词：
biomaterials; Young's modulus; Martensite transformation; Ti alloys; superelasticity;
D O I：
10.1016/j.msec.2005.03.001
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
A bimodal structured Ti60Cu14Ni12Sn4Nb10 alloy has been fabricated by different methods. The as-prepared microstructure is composed of a dendritic bcc-beta-Ti(Nb,Sn) phase and a nano/ultrafine structured matrix. Except for beta-Ti, gamma-TiCu and a few intermetallics the matrix also contains the B2 structure, which acts as a parent phase for a reversible phase transformation around room temperature. Annealing induces precipitation of intermetallics, which significantly increases the yield strength and the Young's modulus, but does not change the reversible phase transformation. The alloy exhibits very high yield strength, large elasticity and low Young's modulus, providing an advantage for biomedical application. The reversible phase transformation provides potential applications as a smart material. (c) 2005 Elsevier B.V. All rights reserved.
引用
收藏
页码：290 / 295
页数：6
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