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置氢TC16钛合金微观组织与变形行为
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北京航空制造工程研究所,北京航空制造工程研究所,北京航空制造工程研究所,北京航空制造工程研究所

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航空基金资助(2015ZE25006)


Deformation behavior and microstructure of hydrogenated TC16 titanium alloy
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Beijing Aeronautical Manufacturing Technology Research Institute,Beijing Aeronautical Manufacturing Technology Research Institute,Beijing Aeronautical Manufacturing Technology Research Institute,Beijing Aeronautical Manufacturing Technology Research Institute

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    摘要:

    通过置氢处理得到不同氢含量的TC16钛合金,采用连续升温法研究了氢含量对TC16钛合金相转变温度的影响,利用光学显微镜研究了置氢TC16钛合金的微观组织,应用准静态压缩试验研究了置氢TC16钛合金的变形行为,通过磁脉冲冷镦试验研究了高应变速率下合金的变形行为。结果表明,TC16钛合金相变温度随氢含量的增加而单调递减,当氢含量达到0.30wt.%时,相变温度大约下降150℃;置氢TC16钛合金微观组织发生变化,低氢时出现了马氏体组织,高氢时主要由等轴β相组织构成;置氢TC16钛合金的应变速率敏感性增加,随着变形速率的提高,其变形性能得到改善,在高应变速率条件下压缩变形极限大于86%,通过冷镦试验制备了表面完好的托板螺母,对变形行为进行了验证。

    Abstract:

    TC16 titanium alloys with different hydrogen quantity were obtained using a hydrogenating treatment. Effects of the hydrogen quantity on phase transformation temperatures of TC16 titanium alloys were investigated by a continuous heating method. Microstructures of hydrogenated TC16 titanium alloys were studied using OM, deformation behaviours of TC16 titanium alloys were studied using quasi-static compression tests, and the alloy deformation behaviours at high strain rates were investigated using magnetic cold heading. The results have shown that, phase transformation temperature of TC16 titanium alloy decreases with the increasing of hydrogen quantity, when this amount reaches 0.3wt. %, the phase temperature decreases around 150 °C; Microstructures of hydrogenated TC16 titanium alloy changes as well, martensite phase generates for low hydrogen quantity, while equal-axial β phase for high hydrogen quantity; Strain rate sensitivity of hydrogenated TC16 titanium alloy increases, with the increasing of deformation rate, the formability is improved, the limit compression deformation is greater than 86% at a high strain rate. Using cold up-setting tests to manufacture layer board nuts with perfect surfaces, the deformation behaviour was validated.

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韩玉杰,王耀奇,侯红亮,徐严谨.置氢TC16钛合金微观组织与变形行为[J].稀有金属材料与工程,2017,46(S1):51~55.[Han Yujie, Hou Hongliang, Wang Qaoqi, Xu Yanjin. Deformation behavior and microstructure of hydrogenated TC16 titanium alloy[J]. Rare Metal Materials and Engineering,2017,46(S1):51~55.]
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  • 收稿日期:2016-05-11
  • 最后修改日期:2016-05-11
  • 录用日期:2017-08-08
  • 在线发布日期: 2017-12-13
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