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首页> 外文期刊>Materials Science and Engineering >Shock-induced mechanical response and spall fracture behavior of an extra-low interstitial grade Ti-6Al-4V alloy
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Shock-induced mechanical response and spall fracture behavior of an extra-low interstitial grade Ti-6Al-4V alloy

机译：超低间隙等级Ti-6Al-4V合金的冲击诱导机械响应和剥落断裂行为

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摘要

The mechanical response and spall fracture behavior of an extra-low interstitial (ELI) grade Ti-6Al-4V alloy are systemically investigated during one-dimensional shock loading. The effects of oxygen content on the shock response and dynamic failure characteristic of Ti-6Al-4V are also shown through the comparison of the obtained results with those for commercial Ti-6Al-4V. The measured Hugoniot elastic limit (HEL) of Ti-6Al-4V ELI is lower than that of commercial Ti-6Al-4V. While the fitted shock parameters and the measured Hugoniot in the stress-particle velocity space of Ti-6Al-4V ELI are found to be almost identical to those of commercial Ti-6Al-4V. These results indicate that the oxygen content can significantly affect the HEL of Ti-6Al-4V, but has little or no influence on the shock response of this alloy beyond the HEL The postshock Ti-6Al-4V ELI does not display shock-induced strengthening during quasistatic and dynamic compression tests. Transmission electron microscopy (TEM) analyses reveal that the lack of high density dislocations or dislocation cells limits the shock-induced strengthening effect, although dislocation multiplication and tangles lead to increased yield strength and strain hardening rate of the reloaded material. Finally, Ti-6Al-4V ELI is demonstrated to spall in a ductile manner, and has similar spall strengths to those of commercial Ti-6Al-4V under different shock loading conditions. The oxygen content exerts no effect on the spall fracture manner of Ti-6Al-4V, although reducing the oxygen content enables this alloy to endure more micro-damages.
机译：在一维冲击载荷下，系统地研究了超低间隙（ELI）级Ti-6Al-4V合金的力学响应和剥落断裂行为。通过将所得结果与市售Ti-6Al-4V的结果进行比较，还显示了氧含量对Ti-6Al-4V的冲击响应和动态破坏特性的影响。 Ti-6Al-4V ELI的测得的Hugoniot弹性极限（HEL）低于商用Ti-6Al-4V的Hugoniot弹性极限。尽管在Ti-6Al-4V ELI的应力-粒子速度空间中拟合的冲击参数和测得的Hugoniot与商用Ti-6Al-4V几乎相同。这些结果表明，氧含量可以显着影响Ti-6Al-4V的HEL，但对超出HEL的该合金的冲击响应影响很小或没有影响。震后的Ti-6Al-4V ELI不会表现出由冲击引起的强化在准静态和动态压缩测试中。透射电子显微镜（TEM）分析表明，尽管位错倍增和缠结会导致重载材料的屈服强度和应变硬化率提高，但缺乏高密度位错或位错单元会限制冲击诱导的强化效果。最后，Ti-6Al-4V ELI被证明具有延展性剥落，并且在不同冲击载荷条件下具有与商用Ti-6Al-4V相似的剥落强度。氧含量对Ti-6Al-4V的剥落断裂方式没有影响，尽管降低氧含量可使该合金承受更多的微损伤。

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  • 来源
    《Materials Science and Engineering》 |2013年第20期|247-255|共9页
  • 作者

    Yu Ren; Fuchi Wang; Chengwen Tan; Shuyou Wang; Xiaodong Yu; Jianwei Jiang; Honglei Ma; Hongnian Cai;

  • 作者单位

    School of Materials Science and Engineering, Beijing Institute of Technology, Beijing 100081, PR China ,National Key Laboratory of Science and Technology on Materials Under Shock and Impact, Beijing Institute of Technology, Beijing 100081, PR China;

    School of Materials Science and Engineering, Beijing Institute of Technology, Beijing 100081, PR China ,National Key Laboratory of Science and Technology on Materials Under Shock and Impact, Beijing Institute of Technology, Beijing 100081, PR China;

    School of Materials Science and Engineering, Beijing Institute of Technology, Beijing 100081, PR China ,National Key Laboratory of Science and Technology on Materials Under Shock and Impact, Beijing Institute of Technology, Beijing 100081, PR China;

    State Key Laboratory of Explosion Science and Technology, Beijing Institute of Technology, Beijing 100081, PR China;

    School of Materials Science and Engineering, Beijing Institute of Technology, Beijing 100081, PR China ,National Key Laboratory of Science and Technology on Materials Under Shock and Impact, Beijing Institute of Technology, Beijing 100081, PR China;

    State Key Laboratory of Explosion Science and Technology, Beijing Institute of Technology, Beijing 100081, PR China;

    China Astronaut Research and Training Center, Beijing 100094, PR China;

    School of Materials Science and Engineering, Beijing Institute of Technology, Beijing 100081, PR China ,National Key Laboratory of Science and Technology on Materials Under Shock and Impact, Beijing Institute of Technology, Beijing 100081, PR China;

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  • 正文语种 eng
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  • 关键词

    Ti-6Al-4V ELI; Oxygen content; Shock-induced mechanical response; Microstructure evolution; Spall fracture;

    机译：Ti-6Al-4V ELI;氧含量;冲击引起的机械响应;微观组织演变;剥落断裂;

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