Composition optimization of low modulus and high-strength TiNb-based alloys for biomedical applications

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• 作者：I.V. Okulov^a ; ^b ; ^c ; ^{okulovilya@yandex.ru} ; A.S. Volegov^a ; ^d ; H. Attar^e ; M. Bö ; nisch^a ; S. Ehtemam-Haghighi^e ; M. Calin^a ; J. Eckert^f ; ^g
• 关键词：Titanium alloy ; Biomedical alloy ; Implant material ; Low Young's modulus ; Deformation mechanism
• 刊名：Journal of the Mechanical Behavior of Biomedical Materials
• 出版年：2017
• 出版时间：January 2017
• 年：2017
• 卷：65
• 期：Complete
• 页码：866-871
• 全文大小：3877 K
• 卷排序：65

文摘

The effect of chemical composition on microstructure and tensile properties of a series of low modulus Ti-Nb-Cu-Ni-Al alloys was studied. These alloys consist of primary micrometer-sized β-Ti dendrites surrounded by intermetallic phases. The morphology of the intermetallic phases is strongly affected by composition. Due to the composite microstructure, the alloys exhibit a low Young's modulus (77–84 GPa) together with a high yield strength of about 1000 MPa as well as moderate tensile ductility. The results demonstrate that complete substitution of Al by Ti reduces the Young's modulus by 5%. Increasing Nb content at the expense of Ti causes a significant improvement of tensile ductility.