Aging response of the young’s modulus and mechanical properties of Ti-29Nb-13Ta-4.6Zr for biomedical applications
Aging response of the young’s modulus and mechanical properties of Ti-29Nb-13Ta-4.6Zr for biomedical applications
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DOI：
10.1007/s11661-003-0230-x
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发表时间：
2003-04
期刊：
影响因子：
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通讯作者：
Y. Hao;R. Yang;M. Niinomi;D. Kuroda;Y. Zhou;K. Fukunaga;A. Suzuki
中科院分区：
文献类型：
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作者：
Y. Hao;R. Yang;M. Niinomi;D. Kuroda;Y. Zhou;K. Fukunaga;A. Suzuki
用于植入装置的合金需要提高强度但降低杨氏模量，以便变得与相邻骨组织机械上更相容。在这项研究中，一种新的亚稳β型钛合金，Ti-29 Nb-13 Ta-4.6Zr（wt %），进行了时效处理，以产生不同的显微组织，并得到的机械性能，包括杨氏模量，进行了测量。发现该合金的杨氏模量对由各种热处理产生的微观结构敏感。对于从（α+β）到（α+β+ω）和（β+ω）的显微组织，杨氏模量随着拉伸强度和硬度的增加而增加，但延展性降低。（β+ω）微结构具有低强度、高模量和差的延展性，并且不能用于生物医学应用。对于（α+β）组织，相的体积分数是决定力学性能的主要因素。
Alloys for implant devices require improved strength but a reduced Young’s modulus, in order to become mechanically more compatible with adjacent bone tissues. In this study, a new metastableβ-type titanium alloy, Ti-29Nb-13Ta-4.6Zr (wt pct), was subjected to aging treatment to produce different microstructures, and the resulting mechanical properties, including the Young’s modulus, were measured. The Young’s modulus of this alloy is found to be sensitive to microstructures generated by various heat treatments. For microstructures varying from (α+β) to (α+β+ω) and (β+ω), the Young’s modulus increases with an accompanying increase in tensile strength and hardness, but decreases in ductility. The (β+ω) microstructure has a low strength, high modulus, and poor ductility and cannot be used for biomedical applications. For an (α+β) microstructure, the volume fraction of the phases is shown to be the main factor that determines the mechanical properties.