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<p>The digital image correlation method is used to determine the structural and deformation factors at the meso- and macro-levels responsible for the low ductility of steel 08G2B (08Mn2Nb), which exhibits the effect of strain aging after heating at 250°C. The factors include a small scale of plastic deformation by the banded mechanism localized in about 1/3 of the sample, where only two strain bands are formed on a short yield plateau and form a strain source when they intersect. The other two strain sources arise in the linear and exponential stages of the tension, when dislocations are unlocked during the distributed deformation.</p>

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Deformation and Ductility of Low-Carbon Steel with Different Magnitudes of Strain Aging Effect. 3. Loss of Ductility During Strain Aging of Steel

  • 期刊论文

  • 发表日期：

    2025年3月1日

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  • V. M. Farber,
  • A. N. Morozova,
  • O. V. Selivanova,
  • V. A. Khotinov

摘要

The digital image correlation method is used to determine the structural and deformation factors at the meso- and macro-levels responsible for the low ductility of steel 08G2B (08Mn2Nb), which exhibits the effect of strain aging after heating at 250°C. The factors include a small scale of plastic deformation by the banded mechanism localized in about 1/3 of the sample, where only two strain bands are formed on a short yield plateau and form a strain source when they intersect. The other two strain sources arise in the linear and exponential stages of the tension, when dislocations are unlocked during the distributed deformation.