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Strain Rate and Temperature Insensitiveness of Notch-bend Strength for High Si Ductile Cast Iron

机译：高硅球墨铸铁的缺口弯曲强度的应变速率和温度敏感性

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摘要

The notch-bend strength (σ_(b,max)) was investigated for High Si Solid Solution Strengthened Ferritic Ductile Cast Iron (EN-GJS-500-14) with varying the strain rate at room temperature. The notch-bend strength was also compared with the conventional ferrite-pearlite type ductile cast iron JIS-FCD500 and JIS-FCD700. Then, the application of the high Si ductile cast iron to wide industrial fields was discussed. Dynamic three-point bending tests were conducted on Charpy V-notch specimens in the range of stroke speed, 10~(-3)～10~2 mm/s, at - 20～22℃. The load-displacement curve for ductile fractured specimens shows that the load (P) steeply increases to the peak value (P_(max); about 10 kN) and then decreases, similar to that in the case of instrumented Charpy impact test. Even though the absorbed energy of fracture process was in the lower shelf region, the notch-bend strength did not decrease with increasing the strain rate as far as the fracture origin is ductile. It was found that the notch-bend strength is insensitive to the strain rate. The notch-bend strength (σ_(b,max)) of high Si ductile cast iron at -20℃ was still equal to that at 22℃, indicating σ_(b,max) is insensitive to the temperature as well as the strain rate. High Si ductile cast iron EN-GJS-500-14 and the conventional ductile cast irons JIS-FCD500 and JIS-FCD700 show nearly the same lowest σ_(b,max) in the range of strain rate, 1.5×10~(-4)～2.0×10~0s~(-1) at -20℃. Therefore, we think that the high Si ductile cast iron has wide industrial application potentiality.
机译：研究了高硅固溶强化铁素体球墨铸铁（EN-GJS-500-14）随室温应变速率变化的缺口弯曲强度（σ_（b，max））。还将缺口弯曲强度与常规的铁素体-珠光体型球墨铸铁JIS-FCD500和JIS-FCD700进行比较。然后，讨论了高硅球墨铸铁在广阔的工业领域中的应用。对夏比V型缺口试样在-20〜22℃的冲程速度10〜（-3）〜10〜2 mm / s范围内进行了动态三点弯曲试验。延性断裂试样的载荷-位移曲线表明，载荷（P）急剧增加到峰值（P_（max）;大约10 kN），然后减小，类似于仪器化的夏比冲击试验的情况。即使断裂过程的吸收能量位于较低的层架区域，但只要断裂起点是可延展的，缺口弯曲强度就不会随着应变率的增加而降低。发现缺口弯曲强度对应变速率不敏感。高硅球墨铸铁在-20℃时的缺口弯曲强度（σ_（b，max））仍与22℃时相同，表明σ_（b，max）对温度和应变率均不敏感。 。高硅球墨铸铁EN-GJS-500-14与常规球墨铸铁JIS-FCD500和JIS-FCD700在1.5×10〜（-4）的应变率范围内显示出几乎相同的最低σ_（b，max） -20℃下）〜2.0×10〜0s〜（-1）。因此，我们认为高硅球墨铸铁具有广阔的工业应用潜力。

著录项

  • 来源
    《ISIJ international》 |2016年第5期|868-874|共7页
  • 作者

    Tomohiro IKEDA; Takuo UMETANI; Nobuhiro KAI; Nao-Aki NODA; Yoshikazu SANO;

  • 作者单位

    HINODE, Ltd., Azaiwasaki, Miyaki-cho, Miyaki-gun, Saga, 849-0101 Japan;

    HINODE, Ltd., Azaiwasaki, Miyaki-cho, Miyaki-gun, Saga, 849-0101 Japan;

    HINODE, Ltd., Azaiwasaki, Miyaki-cho, Miyaki-gun, Saga, 849-0101 Japan;

    Kyushu Institute of Technology, Sensui-cho, Tobata-ku, Kitakyushu, Fukuoka, 804-8550 Japan;

    Kyushu Institute of Technology, Sensui-cho, Tobata-ku, Kitakyushu, Fukuoka, 804-8550 Japan;

  • 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

    cast iron; high silicon; strength; strain rate; temperature;

    机译：铸铁;高硅强度;应变率;温度;

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