Effects of Element Substitute on the Structure and Mechanical Properties of Beta Type Ti Alloy（TMA） for Orthodontics

Pan Min; Zhu Dachuan; Cao Shixiu; Tu Mingjing

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Effects of Element Substitute on the Structure and Mechanical Properties of Beta Type Ti Alloy（TMA） for Orthodontics
Issue 11, Pages: 889-891(2008)
Published： 2008 ，
DOI：

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[1]潘敏,朱达川,曹仕秀,涂铭旌.元素替代对正畸用β钛合金(TMA)组织与力学性能的影响[J].特种铸造及有色合金,2008(11):889-891+819-820.

Pan Min, Zhu Dachuan, Cao Shixiu, et al. Effects of Element Substitute on the Structure and Mechanical Properties of Beta Type Ti Alloy（TMA） for Orthodontics. [J]. Special Casting & Nonferrous Alloys (11):889-891(2008)
[1]潘敏,朱达川,曹仕秀,涂铭旌.元素替代对正畸用β钛合金(TMA)组织与力学性能的影响[J].特种铸造及有色合金,2008(11):889-891+819-820. DOI：

Pan Min, Zhu Dachuan, Cao Shixiu, et al. Effects of Element Substitute on the Structure and Mechanical Properties of Beta Type Ti Alloy（TMA） for Orthodontics. [J]. Special Casting & Nonferrous Alloys (11):889-891(2008) DOI：

摘要

用Cr、Fe或Ce替代β钛合金Ti-11Mo-6Zr-4Sn（TMA）中的部分Mo和Sn

利用X射线衍射仪（XRD）分析了合金的物相结构

用扫描电镜（SEM）观察合金组织形貌、结合电子能谱（EDS）分析了合金元素的分布

利用纳米硬度计测试合金的弹性模量

数字式显微硬度计测试显微硬度

研究了合金元素与均匀化热处理（900℃×2h）对TMA组织和力学性能的影响。结果表明

均匀化热处理前后合金元素Cr、Fe的加入不改变TMA的β相结构;元素Ce、Sn的存在不改变TMA的主相结构

但是在均匀化热处理后添加了Ce、Sn的合金出现了少量的α相和ω相;Cr、Fe替代部分Mo和Sn可提高TMA的杨氏模量和显微硬度

而Ce替代部分Mo则使TMA的杨氏模量和显微硬度降低。

Abstract

The microstructure of beta Ti alloy Ti-11Mo-6Zr-4Sn（TMA） in which some Mo and Sn are substituted by Cr

Fe and Ce was observed by XRD（X-ray diffraction）

SEM（scanning electron microscope） and EDS（energy dispersive spectrumeter）

and the elastic modulus as well as microhardness was measured by CSEM nano-indentation and micro-sclerometer.Furthermore

effects of alloying elements and homogenization treatment on microstructure and mechanical properties of the TMA were described.The results indicate that β phase structure in TMA is independent of the Ce and Fe addition after and before homogenization treatment.Although the dominant phase in the TMA is not affected

precipitation of a little α phase and ω phase can be observed in the TMA alloy after homogenization treatment with Ce and Sn addition.The Young’s modulus and micro-hardness of the TMA alloy are increased with Cr and Fe substituting for Mo and Sn

while they are decreased with Ce substituting for Mo.