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首页> 外文期刊>Fusion Engineering and Design >The mechanical properties and thermal stability of a nanostructured carbide dispersion strengthened W-0.5 wt.% Ta-0.01 wt.% C alloy
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The mechanical properties and thermal stability of a nanostructured carbide dispersion strengthened W-0.5 wt.% Ta-0.01 wt.% C alloy

机译:纳米结构碳化物分散体的力学性能和热稳定性增强了W-0.5 wt。%Ta-0.01 wt。%C合金

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摘要

HighlightsW-TaC alloys are fabricated by high energy ball milling and spark plasma sintering.The recrystallization temperature is 1600°C.The size of nanosized particles is about 62nm.Nanosized structures improve mechanical properties and thermal stability.AbstractIn this paper, W-0.5wt.% Ta-0.01wt.%C (W-05Ta-001C) alloys were fabricated via a combination of high energy ball milling and subsequent spark plasma sintering. The W-05Ta-001C alloys showed high strength of 565MPa at 400°C with a total elongation of 54%. The improved ductility resulted from nanosized TaC precipitation. The microstructure analysis of W-05Ta-001C alloys indicate that the nanosized TaC precipitation uniformly distributed in the grain interior encouraging trapping dislocations. TaC could reduce free oxygen concentration and thus enhance grain boundaries strength by reacting with impurities of oxygen to form compounds of Ta-Cx-Oyat grain boundaries. The thermal stability of W-05Ta-001C alloys was investigated by analyzing the evolution of hardness based on isochronal annealing tests. The results showed that hardness only slightly decreased with increasing annealing temperature up to 1500°C, and the recrystallization temperature was about 1600°C. This good thermal stability is attributed to nanosized TaC dispersion strengthened structures.
机译: 突出显示 W-TaC合金是通过高能球磨和火花等离子体烧结制造的。 重结晶温度为1600°C。 < / ce:list-item> 纳米尺寸粒子大约为62nm。 纳米结构改善了机械性能和热稳定性。 摘要 在本文中,W-0.5通过高能球磨和随后的火花等离子体烧结的组合,制造了重量百分比为Ta-0.01wt。%C(W-05Ta-001C)的合金。 W-05Ta-001C合金在400°C时显示出565MPa的高强度,总伸长率为54%。纳米级TaC沉淀可提高延展性。 W-05Ta-001C合金的显微组织分析表明,纳米级TaC沉淀均匀地分布在晶粒内部,促进了陷阱位错。 TaC可与氧杂质反应形成Ta-C x -O 。基于等时退火试验,通过分析硬度的变化,研究了W-05Ta-001C合金的热稳定性。结果表明,随着退火温度的升高,直到1500°C,硬度仅略有降低,重结晶温度约为1600°C。这种良好的热稳定性归因于纳米级TaC分散增强结构。

著录项

  • 来源
    《Fusion Engineering and Design》 |2017年第12期|490-495|共6页
  • 作者单位

    Key Laboratory of Materials Physics, Institute of Solid State Physics, Chinese Academy of Sciences,University of Science and Technology of China;

    Key Laboratory of Materials Physics, Institute of Solid State Physics, Chinese Academy of Sciences,University of Science and Technology of China;

    Key Laboratory of Materials Physics, Institute of Solid State Physics, Chinese Academy of Sciences,University of Science and Technology of China;

    Key Laboratory of Materials Physics, Institute of Solid State Physics, Chinese Academy of Sciences;

    Key Laboratory of Materials Physics, Institute of Solid State Physics, Chinese Academy of Sciences;

    Key Laboratory of Materials Physics, Institute of Solid State Physics, Chinese Academy of Sciences;

    Key Laboratory of Materials Physics, Institute of Solid State Physics, Chinese Academy of Sciences;

    Institute of Plasma Physics, Chinese Academy of Sciences;

    Southwestern Institute of Physics;

  • 收录信息 美国《科学引文索引》(SCI);美国《工程索引》(EI);美国《生物学医学文摘》(MEDLINE);
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

    W-TaC alloys; Mechanical alloying; Mechanical properties; Thermal stability;

    机译:W-TaC合金;机械合金化;机械性能;热稳定性;

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