Volume 37 Issue 3
Jun.  2022
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GONG Xuhui, GAO Zhenpeng, WU Songlin, NIU Jiajia. Experimental Study on Deep Notch Fracture Characteristics of Q420qE Bridge Steel[J]. Development and Application of Materials, 2022, 37(3): 1-4.
Citation: GONG Xuhui, GAO Zhenpeng, WU Songlin, NIU Jiajia. Experimental Study on Deep Notch Fracture Characteristics of Q420qE Bridge Steel[J]. Development and Application of Materials, 2022, 37(3): 1-4.
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Experimental Study on Deep Notch Fracture Characteristics of Q420qE Bridge Steel

  • 1. Luoyang Ship Material Research Institute, Luoyang 471023, China;

  • 2. Henan Key Laboratory of Technology and Application of Structural Materials for Ships and Marine Equipment, Luoyang 471023, China

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  • Received Date: January 13, 2022
  • Available Online: September 05, 2022
    Graphical Abstract
    • Abstract
  • Deep notch wide plate tensile test and conventional tensile test are conducted on 20 mm-thick Q420qE steel in temperature range of -80~20℃. Results indicate that with the decreasing temperature, the fracture strength Rf increases, the fracture strain ef remains almost the same, and the deep notch fracture strength Rn decreases. A modified Neuber formula is proposed to describe the relationship between Rn, Rf, ef and the temperature. The deviation between Rn calculated by the proposed formula and tested by deep notch wide plate tensile test is within ±5%, indicating that for deep notch wide plate tensile test, the decrease of temperature may increase the concentration of stress and strain due to the presence of the deep notch.
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    • References (7)
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