Ti-6Al-3Nb-2Zr-1Mo合金室温压缩蠕变行为及位错类型研究

许玲玉; 王洋; 王启; 蒋鹏; 廖志谦

Ti-6Al-3Nb-2Zr-1Mo合金室温压缩蠕变行为及位错类型研究

许玲玉^1,3,
王洋^1,2,3,
王启^1,4,
蒋鹏^1,2,3,
廖志谦¹

1. 中国船舶重工集团公司第七二五研究所, 河南洛阳 471023;
2. 国家新材料生产应用示范平台(先进海工与高技术船舶材料), 河南洛阳 471023;
3. 先进钛及钛合金材料技术国家地方联合工程研究中心, 河南洛阳 471023;
4. 黄淮学院, 河南驻马店 463000

详细信息

作者简介:
许玲玉,女,1990年生,助理工程师,硕士,主要从事舰船钛合金应用研究。E-mail:xulingyumse@126.com

中图分类号: TG146.23
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出版历程
- 收稿日期: 2020-08-26
- 刊出日期: 2021-02-25

Study on Compressive Creep Behavior at Room Temperature and Dislocation Type of Ti-6Al-3Nb-2Zr-1Mo Alloy

XU Lingyu^1,3,
WANG Yang^1,2,3,
WANG Qi^1,4,
JIANG Peng^1,2,3,
LIAO Zhiqian¹

1. Luoyang Ship Material Research Institute, Luoyang 471023, China;
2. National New Material Production and Application Demonstration Platform(Advanced Marine Engineering and High Tech Ship Materials), Luoyang 471023, China;
3. National and Local Joint Engineering Research Center of Advanced Titanium and Titanium Alloy Materials Technology, Luoyang 471023, China;
4. HuangHuai University, Zhumadian 463000, China

摘要

摘要: 研究Ti-6Al-3Nb-2Zr-1Mo合金在不同外加应力下的室温压缩蠕变行为，拟合了蠕变曲线，计算出蠕变发生第二阶段的临界值，并对不同应力水平压缩后的合金显微组织进行TEM观察，研究其位错滑移类型。结果表明：室温条件下，Ti-6Al-3Nb-2Zr-1Mo合金压缩蠕变-时间曲线符合时间强化指数模型，该合金发生蠕变第二阶段的临界值为518 MPa，这为深海装备的安全设计提供了依据。Ti-6Al-3Nb-2Zr-1Mo合金室温压缩蠕变机制主要是位错滑移，其中基面滑移最容易启动，其次是柱面滑移和锥面滑移。结合微观组织分析与蠕变曲线可以判断锥面滑移对蠕变有较大贡献。
- Ti-6Al-3Nb-2Zr-1Mo合金 /
- 压缩蠕变曲线 /
- 蠕变机制
Abstract: Compressive creep behavior and mechanism at room temperature of Ti-6 Al-3 Nb-2 Zr-1 Mo alloy under different applied stresses were investigated, the creep curves were fitted, the critical value of the second stage of creep calculated, the microstructures of the alloy after compression at different stress levels observed by TEM, and the dislocation slip types studied. The results showed that the compressive creep curve of Ti-6 Al-3 Nb-2 Zr-1 Mo titanium alloy conformed to the time-strengthening model at room temperature, and the critical value of the second stage of creep was 518 MPa, which laid a foundation for the safety design of deep-sea equipment. The creep mechanism of Ti-6 Al-3 Nb-2 Zr-1 Mo titanium alloy at room temperature was mainly dislocation slip, and the slip system with the most easy starting was basal slip, followed by prismatic slip and pyramidal slip. By microstructure and creep curve analysis, it was concluded that pyramidal slip had a great contribution to creep deformation.
- Ti-6Al-3Nb-2Zr-1Mo alloy /
- compression creep curves /
- creep mechanism

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