Control of microstructure and mechanical anisotropy of biomedical superelastic titanium alloys through introducing high density lattice defects.

通过引入高密度晶格缺陷控制生物医用超弹性钛合金的微观结构和机械各向异性。

基本信息

  • 批准号:
    17360334
  • 负责人:
  • 金额:
    $ 10.45万
  • 依托单位:
  • 依托单位国家:
    日本
  • 项目类别:
    Grant-in-Aid for Scientific Research (B)
  • 财政年份:
    2005
  • 资助国家:
    日本
  • 起止时间:
    2005 至 2007
  • 项目状态:
    已结题

项目摘要

The purpose of this research is to clarify the relationships among microstructures, defects and mechanical properties of Ni-free biomedical shape memory alloys, especially TiNbAl alloys, through thermo-mechanical treatments to introduce high-energy and high-density lattice defects by severe deformations. In order to enhance their superelastic properties, material strengthening to increase critical stress for slip deformation is effective and this was tried by severe deformations of cold rolling up to 99% in reduction thickness and rapid solidification. Firstly, the formation of texture and superelastic deformation were investigated using Ti-26Nb-3A1 alloy with relatively low martensitic transformation temperatures. It was found that the development of deformation texture is strongly related to true strain and that the texture is rapidly grown after when the true strain becomes over 3. Although the grain size after the solution treatment is coarse around 500μm, the grains become fine an … More d needle-like shape elongated with the rolling direction. Then, the development of recrystallization texture was investigated with various cold rolling reductions. It was found that the development of recrystallization texture is strongly dependent on reduction rate, and that different textures are developed. {001}_β<110>_β type texture is formed when cold rolling reduction is lower than 90%, and further increasing cold rolling reduction, the texture formed is changed to {112}_β<110>_β type. {001}_β<110>_β type exhibits less anisotropy in superelasticity than {112}_β<110>_β, resulting that {001}_β<110>_β type texture is more useful for practical applications. Secondly, the texture formation of α" and α"+β type TiNbA1 alloys was investigated. It was found that deformation and recrystallization textures are {112}_β<110>_β type and {111}_β<110>_β for the α"+β alloy, respectively. Besides, deformation and recrystallization textures of α" alloy are {223}_<α"><302>_<α"> type and {011}_<α"><311>_<α"> for the α" alloy, respectively. Therefore, the type of texture formation as well as superelasticity strongly depends on the type of stable phase in the TiNbAl alloys. Similar results were obtained for the cold rolled wires. Finally, the rapid solidification was done for Ti-24Nb-3A1 but neither texture nor fine grains were formed even though the high energy process of the rapid solidification. It is conclude that texture and superelastic properties of the titanium alloys can be controlled through a proper thermomechanical treatment combined with severe deformation. Less
本研究的目的是阐明无镍生物医用形状记忆合金,特别是TiNbAl合金,通过热机械处理引入高能和高密度的晶格缺陷,通过剧烈变形的微观结构,缺陷和力学性能之间的关系。为了提高它们的超弹性性能,材料强化以增加滑移变形的临界应力是有效的,并且这通过在减薄厚度和快速凝固中高达99%的冷轧的剧烈变形来尝试。首先,研究了马氏体相变温度较低的Ti-26 Nb-3A 1合金的织构形成和超弹性变形。结果表明,形变织构的发展与真应变密切相关,当真应变大于3时,织构迅速长大。虽然固溶处理后的晶粒尺寸在500μm左右较粗,但晶粒变得细小, ...更多信息 d针状形状随着轧制方向伸长。然后,再结晶织构的发展与不同的冷轧变形量进行了研究。研究发现,再结晶织构的发展强烈依赖于压下率,不同的织构发展。{001}当<110>冷轧压下量小于90%时,形成了_β _β型织构,进一步增加冷轧压下量,形成的织构转变为{112}_β<110>_β型织构。{001}_β<110>_β型织构比{112}_β _β型织构具有更小的超弹性各向异性<110>,因此{001}_β<110>_β型织构更有实用价值。其次,研究了α”和α"+β型TiNbA_1合金织构的形成。结果表明,α"+β合金的形变织构和再结晶织构分别为{112}_β<110>_β型和{111}_β<110>_β型。此外,α”合金的形变织构和再结晶织构分别为{223}_&lt;α"&gt;<302>_&lt;α"&gt;和{011}_&lt;α"&gt;<311>_&lt;α"&gt;。因此,织构形成的类型以及超弹性强烈地依赖于TiNbAl合金中的稳定相的类型。对于冷乳线材获得了类似的结果。最后,对Ti-24 Nb-3A 1进行了快速凝固,但即使在快速凝固的高能过程中也没有形成织构或细晶。结果表明,通过适当的形变热处理和剧烈的变形,可以控制钛合金的织构和超弹性性能。少

项目成果

期刊论文数量(0)
专著数量(0)
科研奖励数量(0)
会议论文数量(0)
专利数量(0)
Microstructure of Ti-24Nb-3AI Melt-Spun Ribbon
Ti-24Nb-3AI熔纺带材的显微组织
  • DOI:
  • 发表时间:
    2007
  • 期刊:
  • 影响因子:
    0
  • 作者:
    Y. Yamamoto;T. Inamura;H. Hosoda;K. Wakashima;S. Miyazaki;S. Tsurekawa;T. Nakano;Y. Umakoshi
  • 通讯作者:
    Y. Umakoshi
Internal Defect of Orthorhombic Martensite in Ti-Nb Based Shape Memory Alloy
Ti-Nb基形状记忆合金中斜方马氏体的内部缺陷
  • DOI:
  • 发表时间:
    2007
  • 期刊:
  • 影响因子:
    0
  • 作者:
    T. Inamura;J. I. Kim;H. Y. Kim;S. Miyazaki;K. Wakashima;H. Hosoda
  • 通讯作者:
    H. Hosoda
生体用形状記憶・超弾性合金
生物用形状记忆/超弹性合金
  • DOI:
  • 发表时间:
    2007
  • 期刊:
  • 影响因子:
    0
  • 作者:
    T. Inamura;H. Hosoda;K. Wakashima;J.I. Kim;H.Y. Kim;S. Miyazaki;細田秀樹
  • 通讯作者:
    細田秀樹
Mechanical Properties of Ti-Nb Shape Memory Alloys Containing 3d Transition Metal Elements(V, Cr, Mn, Fe, Co, Ni and Cu)
含3d过渡金属元素(V、Cr、Mn、Fe、Co、Ni、Cu)的Ti-Nb形状记忆合金的力学性能
  • DOI:
  • 发表时间:
    2007
  • 期刊:
  • 影响因子:
    0
  • 作者:
    H. Hosoda;Y. Horiuchi;K. Nakayama;T. Inamura;K. Wakashima;S. Miyazaki
  • 通讯作者:
    S. Miyazaki
Cytocompatibility Evaluation of Ti-Ni and Ti-Mo-Al System Shape Memory Alloys
Ti-Ni和Ti-Mo-Al系形状记忆合金的细胞相容性评价
  • DOI:
  • 发表时间:
    2007
  • 期刊:
  • 影响因子:
    0
  • 作者:
    A. Yamamoto;Y. Kohyama;H. Hosoda;S. Miyazaki;T. Hanawa
  • 通讯作者:
    T. Hanawa
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HOSODA Hideki其他文献

HOSODA Hideki的其他文献

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{{ truncateString('HOSODA Hideki', 18)}}的其他基金

Quest for fundamental dynamics of domain homo interface in shape change materials and principles for high performance materials
寻求形状变化材料中域同质界面的基本动力学和高性能材料的原理
  • 批准号:
    26220907
  • 财政年份:
    2014
  • 资助金额:
    $ 10.45万
  • 项目类别:
    Grant-in-Aid for Scientific Research (S)
Perfect superelasticity by dispersion of effective precipitate routed through brittle phase in biomedical titanium alloy
生物医用钛合金中通过脆性相的有效析出物的弥散实现了完美的超弹性
  • 批准号:
    20360310
  • 财政年份:
    2008
  • 资助金额:
    $ 10.45万
  • 项目类别:
    Grant-in-Aid for Scientific Research (B)

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用于钛合金部件织构分析的在线 NDE 加工力反馈分析的开发
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    2879514
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Understanding the Machinability of Titanium Alloy Components From a Range of Processing Routes to Inform Tooling Solutions for Next Generation Closed
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