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Modeling of notch tensile behavior of martensitic steels

  • Testing And Evaluation
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Abstract

Notch tensile tests have been carried out on six grades of a high-strength martensitic steel at different hardness levels to investigate the effects of stress triaxiality at the net section and uniaxial tensile properties on fracture behavior. Cylindrical V-notched specimens were used in these tests with the notch-root radius, ρ, ranging from 0.03–1.4 mm, and with the value of the net-to-gross diameter ratio being 0.6. The notch strength ratio (NSR) was found to attain its maximum value at ρ=0.38 mm. The test results were used successfully for screening the fracture toughness behavior of the martensitic steel by extrapolating the corresponding ρ-NSR curve to ρ=0.0. Further, finite element computation of the average stress triaxiality factor (\(\bar \eta \)) enabled the development of a model more accurate than that reported in the literature for estimating NSR for a ductile material as a function of \(\bar \eta \) and its uniaxial tensile properties.

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Authors and Affiliations

  1. Mechanical Design and Production Department, Faculty of Engineering, Cairo University, Egypt

    M. M. Megahed

  2. Technical Departments, Maadi Company for Engineering Industry, Cairo, Egypt

    N. M. Abd-Allah

  3. Mechanical Engineering Department, King Fahd University of Petroleum and Minerals, Dhahran, Saudi Arabia

    A. M. Eleiche

Authors
  1. M. M. Megahed
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  2. N. M. Abd-Allah
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  3. A. M. Eleiche
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Megahed, M.M., Abd-Allah, N.M. & Eleiche, A.M. Modeling of notch tensile behavior of martensitic steels. J. of Materi Eng and Perform 12, 61–67 (2003). https://doi.org/10.1361/105994903770343493

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  • DOI: https://doi.org/10.1361/105994903770343493

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