High pressure torsion induced lowering of Young's modulus in high strength TNZT alloy for bio-implant applications

被引：28

作者：

Maity, T. ^{[1
,2
,3
]}

Balci, O. ^{[4
]}

Gammer, C. ^{[3
]}

Ivanov, E. ^{[5
]}

Eckert, J. ^{[2
,3
]}

Prashanth, K. G. ^{[3
,6
,7
]}

机构：

[1] Natl Inst Foundry & Forge Technol, Ranchi 834003, Bihar, India

[2] Univ Leoben, Dept Mat Sci, Jahnstr 12, A-8700 Leoben, Austria

[3] Austrian Acad Sci, Erich Schmid Inst Mat Sci, Jahnstr 12, A-8700 Leoben, Austria

[4] Koc Univ, Dept Chem, Rumelifeneri Yolu, Istanbul 34450, Turkey

[5] Tosoh SMD Inc, Grove City, OH 43123 USA

[6] Tallinn Univ Technol, Dept Mech & Ind Engn, Ehitajate Tee 5, EE-19086 Tallinn, Estonia

[7] VIT Univ, Sch Mech Engn, CBCMT, Vellore 632014, Tamil Nadu, India

来源：

JOURNAL OF THE MECHANICAL BEHAVIOR OF BIOMEDICAL MATERIALS | 2020年 / 108卷

关键词：

beta-Ti alloy; Micro-/nanoindentation; High-pressure torsion; Strain-rate sensitivity; Activation volume; Young's modulus; STRAIN-RATE SENSITIVITY; BETA-TITANIUM ALLOYS; DEFORMATION MECHANISMS; WEAR PROPERTIES; GRAIN-SIZE; NANOCRYSTALLINE; BEHAVIOR; TI; MICROSTRUCTURE; PLASTICITY;

D O I：

10.1016/j.jmbbm.2020.103839

中图分类号：

R318 [生物医学工程];

学科分类号：

100103 [病原生物学];

摘要：

An exceptional combination of low Young's modulus (E similar to 68 GPa) and high flow strength (sigma(f) similar to 1 GPa) was achieved for a consolidated beta-Ti-based metastable Ti-35Nb-7Zr-5Ta (TNZT) alloy subjected to room temperature high-pressure torsion (HPT). The mechanical properties of the alloy were studied by quasistatic nanoindentation tests at different strain rates, where a reduction in Young's modulus E similar to 73 GPa (N-HPT(10)) and E similar to 68 GPa (N-HPT(40)) is observed together with an increase in plastic deformability (or HPT rotations). The microstructure evolution with increasing shear strain has been investigated. The stabilized bcc beta-Ti phase with homogeneous nanostructure distribution was observed leading to a low Young's modulus. Severe straining causes a uniform hardness distribution without any noticeable change in the strength of the material. This study may be useful for developing excellent removable implant materials.

引用

页数：10

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