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首页> 外文期刊>Materials Science and Engineering >The dynamic response of the metastable β titanium alloy Ti-2Al-9.2Mo-2Fe at ambient temperature
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The dynamic response of the metastable β titanium alloy Ti-2Al-9.2Mo-2Fe at ambient temperature

机译：环境温度下亚稳β钛合金Ti-2Al-2Fe的动态响应

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摘要

The mechanical behavior of a metastable beta titanium alloy, Ti-2Al-9.2Mo-2Fe (wt%), was studied through high compression strain rate (similar to 3000 s(-1)) at ambient temperature by Spilt Hopkinson Pressure Bar (SHPB) tests after solution treatment at 850 degrees C for 0.5 h and 950 degrees C for 1 h. The mechanism of deformation and microstructure evolution was investigated by electron backscatter diffraction (EBSD) and transmission electron microscopy (TEM). Multiple deformation mechanisms, including primary and secondary {332} twinning, stress-induced martensite, and stress-induced omega-phase and dislocation slips, were identified in specimens subjected to solution treatment at 850 degrees C for 0.5 h. In contrast, only primary and secondary {332} twinning and dislocation slips were detected in specimens subjected to solution treatment at 950 degrees C for 1 h. The athermal omega precipitation produced after solution treatment and elevated temperature generated during dynamic loading played a crucial role in the different deformation mechanisms observed in the two different specimens. Moreover, the deformation mechanisms active during plastic deformation in the different strain regimes affected the development of different textures in the Ti-2Al-9.2Mo-2Fe alloys from each regime.
机译：通过溢出的Hopkinson压力棒（SHPB，通过高压缩应变速率（类似于3000s（-1））来研究亚稳态β钛合金Ti-2Al-9.2mO-2Fe（wt％）的力学行为）在850℃下溶液处理后试验0.5小时和950℃。通过电子反向散射衍射（EBSD）和透射电子显微镜（TEM）研究了变形和微观结构演化的机理。在经过850℃下进行溶液处理的试样中，鉴定了多种变形机制，包括初级和次级{332}孪晶，应力诱导的马氏体和应激诱导的ω相和位错滑动。相反，在在950℃下进行溶液处理的试样中检测到初级和次级{332}孪晶和位错滑动。在动态载荷期间产生的溶液处理和升高的温度下产生的静脉ω沉淀在两种不同标本中观察到的不同变形机制中起着至关重要的作用。此外，不同应变制度中塑性变形期间的变形机制影响了每个方案的Ti-2Al-9.2Mo-2Fe合金中不同纹理的发育。

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  • 来源
    《Materials Science and Engineering》 |2019年第28期|191-200|共10页
  • 作者

    Xiao J. F.; Nie Z. H.; Tan C. W.; Zhou G.; Chen R.; Li M. R.; Yu X. D.; Zhao X. C.; Hui S. X.; Ye W. J.; Lee Y. T.;

  • 作者单位

    Beijing Inst Technol Sch Mat Sci & Engn Beijing 100086 Peoples R China;

    Beijing Inst Technol Sch Mat Sci & Engn Beijing 100086 Peoples R China;

    Beijing Inst Technol Sch Mat Sci & Engn Beijing 100086 Peoples R China;

    Northwest Inst Nucl Technol Xian 710024 Shaanxi Peoples R China;

    Beijing Inst Technol Sch Mat Sci & Engn Beijing 100086 Peoples R China;

    Northwest Inst Nucl Technol Xian 710024 Shaanxi Peoples R China;

    Beijing Inst Technol Sch Mat Sci & Engn Beijing 100086 Peoples R China;

    Beijing Inst Technol Sch Mat Sci & Engn Beijing 100086 Peoples R China;

    Gen Res Inst Nonferrous Met State Key Lab Nonferrous Met & Proc Beijing 100086 Peoples R China;

    Gen Res Inst Nonferrous Met State Key Lab Nonferrous Met & Proc Beijing 100086 Peoples R China;

    Kyungnam Univ Dept Nano New Mat Chang Won 51767 South Korea;

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  • 原文格式 PDF
  • 正文语种 eng
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  • 关键词

    Metastable beta-titanium alloy; High strain rate; Deformation mechanism; Strain-hardening behavior;

    机译：亚稳β-钛合金;高应变率;变形机制;应变硬化行为;

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