低电子浓度Ti-Nb-Zr合金组织及性能研究

doi:10.11901/1005.3093.2018.436

材料研究学报

2019, Vol. 33

Issue (1): 27-33 DOI: 10.11901/1005.3093.2018.436

研究论文

本期目录 | 过刊浏览

低电子浓度Ti-Nb-Zr合金组织及性能研究

周洪雷¹,侯峰起^2,³,郝玉琳³(

)

1. 吉林大学物理学院长春 130012
2. 西部超导材料科技股份有限公司西安 710021
3. 中国科学院金属研究所沈阳 110016

Microstructures and Mechanical Properties of Ti-Nb-Zr Alloys with Low Electron-to-Atom Ratio

Honglei ZHOU¹,Fengqi HOU^2,³,Yulin HAO³(

)

1. College of Physics, Jilin University, Changchun 130012, China
2. Western Superconducting Technologies Co., Ltd., Xi'an 710021, China
3. Institute of Metal Research, Chinese Academy of Sciences, Shenyang 110016, China

引用本文:

周洪雷,侯峰起,郝玉琳. 低电子浓度Ti-Nb-Zr合金组织及性能研究[J]. 材料研究学报, 2019, 33(1): 27-33.
Honglei ZHOU, Fengqi HOU, Yulin HAO. Microstructures and Mechanical Properties of Ti-Nb-Zr Alloys with Low Electron-to-Atom Ratio[J]. Chinese Journal of Materials Research, 2019, 33(1): 27-33.

全文: PDF(4762 KB) HTML

摘要:

研究了β稳定元素Nb和中性元素Zr对Ti-Nb-Zr合金的微观组织及力学性能的影响，结果显示：随着Nb和Zr含量增加，α"马氏体相和ω相两种典型亚稳相变均可被抑制，在较低电子浓度条件下获得单一β相组织，其临界电子浓度约为4.19，显著低于Ti-Nb二元合金的临界值(4.24)；低电子浓度单一β相Ti-Nb-Zr合金的弹性模量较低，其强度与弹性模量比值较高，具有优于Ti-Nb二元合金的生物力学相容性。

关键词 ：金属材料, Ti-Nb-Zr合金, 微观组织, 相变, 弹性模量, 强度

Abstract：

The microstructure and mechanical property were investigated for Ti-Nb-Zr Ti-alloys with varying contents of (24~30)Nb and (8~12 mass fraction%)Zr. The results show that the increase of Nb- and Zr-content is favorable for suppressing α" martensite- and ω phase- formation, while the alloys composed of single β phase can be obtained as their electron-to-atom ratio higher than about 4.19, which is much less than the ratio 4.24 for Ti-Nb binary alloys. The Ti-30Nb-(8~12)Zr alloys of single β phase exhibit low Young's modulus of about 62 GPa and high strength-to-modulus of about 0.9%, which imply that these alloys possess superior biomechanical compatibility rather than Ti-Nb binary alloys.

Key words： metallic materials Ti-Nb-Zr alloy microstructure phase transformation elastic modulus strength

收稿日期: 2018-07-05

ZTFLH:

TG146.2

基金资助:国家自然科学基金(51071152)

作者简介: 周洪雷，男，1971年生，工程师

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https://www.cjmr.org/CN/10.11901/1005.3093.2018.436 或 https://www.cjmr.org/CN/Y2019/V33/I1/27

表1 Ti-Nb-Zr合金名义成分及相应价电子浓度e/a值

图1 固溶态Ti-xNb-10Zr合金光学组织：x=24 (a), 26 (b), 28 (c), 30 (d)

图2 固溶态Ti-xNb-12Zr合金X-ray衍射分析：(1) x=24, (2) x=26, (3) x=28, (4) x=30

图3 固溶态Ti-28Nb-xZr合金X-ray衍射分析：(1) x=8, (2) x=10, (3) x=12

图4 固溶态Ti-26Nb-8Zr(a, b)及Ti-26Nb-12Zr(c, d)合金TEM明场像和ω相暗场像

图5 固溶态Ti-28Nb-8Zr(a)及Ti-28Nb-10Zr(b)合金TEM明场形貌像及衍射像

表2 固溶处理态Ti-Nb-Zr合金相组成

图6 固溶态Ti-(24-30)Nb-(8-12)Zr合金的应力位移曲线：(a) Ti-24Nb-xZr；(b) Ti-26Nb-xZr；(c) Ti-28Nb-xZr；(d) Ti-30Nb-xZr

图7 固溶态Ti-Nb-Zr合金的抗拉强度(a)、弹性模量(b)及强度模量比(c)： (1) Ti-24Nb-xZr；(2) Ti-26Nb-xZr；(3) Ti-28Nb-xZr；(4) Ti-30Nb-xZr

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