首页> 外文期刊>Acta biomaterialia >Deformation-induced ω phase in modified Ti-29Nb-13Ta-4.6Zr alloy by Cr addition.
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Deformation-induced ω phase in modified Ti-29Nb-13Ta-4.6Zr alloy by Cr addition.

机译:通过Cr加入改性Ti-29nB-13TA-4.6ZR合金中的变形诱导的ω相。

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摘要

For spinal-fixation applications, implants should have a high Young's modulus to reduce springback during operations, though a low Young's modulus is required to prevent stress shielding for patients after surgeries. In the present study, Ti-29Nb-13Ta-4.6Zr alloy (TNTZ) with a low Young's modulus was modified by adding Cr to obtain a higher deformation-induced Young's modulus in order to satisfy these contradictory requirements. Two newly designed alloys, TNTZ-8Ti-2Cr and TNTZ-16Ti-4Cr, possess more stable β phases than TNTZ. These alloys consist of single β phases and exhibit relatively low Young's moduli of <65GPa after solution treatment. However, after cold rolling, they exhibit higher Young's moduli owing to a deformation-induced ω-phase transformation. These modified TNTZ alloys show significantly less springback than the original TNTZ alloy based on tensile and bending loading-unloading tests. Thus, the Cr-added TNTZ alloys are beneficial for spinal-fixation applications.
机译:对于脊柱固定应用,植入物应具有高杨氏模量,以减少运营期间的回弹,但需要低杨氏模量来防止手术后患者的应力屏蔽。 在本研究中,通过添加CR来改变具有低杨氏模量的Ti-29NB-13TA-4.6ZR合金(TNTZ)以获得更高的变形诱导的杨氏模量,以满足这些矛盾的要求。 两个新设计的合金,TNTZ-8TI-2CR和TNTZ-16TI-4CR,比TNTZ更稳定的β相。 这些合金包括单β相,在溶液处理后表现出相对较低的杨氏Moduli。 然而,在冷轧之后,由于变形诱导的ω相变化,它们表现出更高的杨氏模。 这些改性TNTZ合金的回弹比原始TNTZ合金显着较低,基于拉伸和弯曲的装载卸载试验。 因此,CR添加的TNTZ合金有利于脊柱固定应用。

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