Volume 36 Issue 1
Feb.  2021
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XU Lingyu, WANG Yang, WANG Qi, JIANG Peng, LIAO Zhiqian. Study on Compressive Creep Behavior at Room Temperature and Dislocation Type of Ti-6Al-3Nb-2Zr-1Mo Alloy[J]. Development and Application of Materials, 2021, 36(1): 17-23.
Citation: XU Lingyu, WANG Yang, WANG Qi, JIANG Peng, LIAO Zhiqian. Study on Compressive Creep Behavior at Room Temperature and Dislocation Type of Ti-6Al-3Nb-2Zr-1Mo Alloy[J]. Development and Application of Materials, 2021, 36(1): 17-23.
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Study on Compressive Creep Behavior at Room Temperature and Dislocation Type of Ti-6Al-3Nb-2Zr-1Mo Alloy

  • 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

  • Received Date: 2020-08-26
  • Publish Date: 2021-02-25
    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.

     

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