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首页> 外文期刊>Materials Science and Engineering >Effect of oxygen content on the mechanical properties and plastic deformation mechanisms in the TWIP/TRIP Ti-12Mo alloy
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Effect of oxygen content on the mechanical properties and plastic deformation mechanisms in the TWIP/TRIP Ti-12Mo alloy

机译：氧含量对TII-12MO合金中的机械性能和塑性变形机制的影响

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摘要

In the last decades, biomaterials have improved the life and its quality for millions around the Globe. Titanium-based biomaterials have rapidly become the gold standard for bone contact applications. Despite their successful performance, their low strength-ductility trade-offs and work-hardening rates limit their use for example for the manufacture of vascular stents. Although a high strength-ductility trade-off and a high work-hardening rate were reported for the TWIP/TRIP Ti-12Mo alloy, strengthening strategies are required to approach its strength to the ones of Co-Cr alloys, main metallic materials used to produce stents. In this study, the investigated strengthening strategy was the increase of oxygen content from 0.04 to 0.18 wt% in the Ti-12Mo alloy. The effect of this increase on its microstructure, mechanical properties and plastic deformation mechanisms was studied. Athermal ω precipitates were observed throughout with the β matrix of both solution-treated alloys. X-Ray diffraction and transmission electron microscopy suggested that the quantity of ω phase was larger in the alloy with a higher oxygen content, contrasting with the common knowledge that O suppresses ω phase precipitation. Independently of oxygen content, {332}<113> twins and stress-induced martensite (SIM) α" occurred in the deformed mi-crostructures. Based on the electron backscatter diffraction analyses, the area fraction of SIM α" decreased by increasing oxygen content. Although elongation decreased with this oxygen content increase, Ti-12Mo-0.18O exhibited a high true uniform elongation of 25% and a true ultimate tensile strength higher than the Ti-12Mo-0.04O alloy. Hardness and yield strength also increased by increasing oxygen content, while elastic modulus did not change.
机译：在过去的几十年中，生物材料在全球数百万次提高了寿命及其质量。钛基生物材料迅速成为骨接触应用的金标准。尽管其成功的性能成功，但它们的低强度 - 延展性权衡和工作 - 硬化率限制了它们的用途，例如用于制造血管支架。虽然报告了高强度 - 延展性折射率和高效 - 硬化率为TWIP / TRIP TI-12MO合金，但需要强化策略来接近其对CO-CR合金的强度，主要金属材料用于生产支架。在本研究中，研究的强化策略在Ti-12MO合金中增加了0.04至0.18wt％的氧含量。研究了这种增加对其微观结构，机械性能和塑性变形机制的影响。在整个溶液处理的合金的β基质中观察到静脉沉淀物。 X射线衍射和透射电子显微镜表明，合金的ω相的量较大，氧含量较高，与o抑制ω相沉淀的常识对比。独立于氧含量，{332} <113个双胞胎和应力诱导的马氏体（SIM）α“发生在变形的Mi-rostructes中。基于电子反向散射衍射分析，SIMα的面积分数通过增加氧含量降低。尽管随着该氧含量的增加而降低伸长率，但Ti-12Mo-0.18O表现出高25％的真正均匀伸长率和高于Ti-12MO-0.04O合金的真正的极限拉伸强度。通过增加氧含量，硬度和屈服强度也增加，而弹性模量没有变化。

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  • 来源
    《Materials Science and Engineering》 |2021年第10期|141346.1-141346.10|共10页
  • 作者

    Carolina Catanio Bortolan; Leonardo Contri Campanelli; Carlo Paternoster; Nicolas Giguere; Nicolas Brodusch; Claudemiro Bolfarini; Raynald Gauvin; Paolo Mengucci; Gianni Barucca; Diego Mantovani;

  • 作者单位

    Laboratory for Biomaterials and Bioengineering (LBB) Canada for the Innovation in Surgery Department of Mining Metallurgy and Materials Engineering & Regenerative Medicine CHU de Quebec Research Center Laval University Quebec City G1V 0A6 Canada;

    Institute of Science and Technology (ICT) Federal University of Sao Paulo UNIFESP Sao Jose Dos Campos 12231-280 Brazil Department of Materials Engineering (DEMa) Federal University of Sao Carlos UFSCar Sao Carlos 13565-905 Brazil;

    Laboratory for Biomaterials and Bioengineering (LBB) Canada for the Innovation in Surgery Department of Mining Metallurgy and Materials Engineering & Regenerative Medicine CHU de Quebec Research Center Laval University Quebec City G1V 0A6 Canada;

    Quebec Metallurgy Center (CMQ) Trois-Rivieres G9A 5E1 Canada;

    Department of Mining and Materials Engineering McGill University Montreal H3A 0C5 Canada;

    Department of Materials Engineering (DEMa) Federal University of Sao Carlos UFSCar Sao Carlos 13565-905 Brazil;

    Department of Mining and Materials Engineering McGill University Montreal H3A 0C5 Canada;

    Dipartimento di Scienze e Ingegneria Delia Materia Dell'Ambiente Ed Urbanistica SIMAU Universita Politecnica Delle Marche Ancona 60131 Italy;

    Dipartimento di Scienze e Ingegneria Delia Materia Dell'Ambiente Ed Urbanistica SIMAU Universita Politecnica Delle Marche Ancona 60131 Italy;

    Laboratory for Biomaterials and Bioengineering (LBB) Canada for the Innovation in Surgery Department of Mining Metallurgy and Materials Engineering & Regenerative Medicine CHU de Quebec Research Center Laval University Quebec City G1V 0A6 Canada;

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  • 正文语种 eng
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  • 关键词

    Titanium alloy; Biomaterials; Oxygen; Strengthening; Deformation twinning; Stress-induced martensitic transformation;

    机译：钛合金;生物材料;氧;强化;变形孪生;应激诱导的马氏体转换;

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