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<p>Digital image correlation (DIC) is used to analyze local strain distribution in bimetal composite specimens produced by electron beam additive manufacturing from low-carbon steel and austenitic stainless steel in the as-built state and after its annealing at 680 °C and 950 °C. It is found out that plastic deformation tends to localize in each layer of the composites according to the loading stages. The yield stage (<i>n</i> = 0) and the related Lüders deformation are suppressed. In the parabolic hardening stage (<i>n</i> = 0.5), the local elongation strain ε<sub><i>x</i><i>x</i></sub> is observed to form a&#xa0;stationary periodic distribution of localized strain zones. At <i>n</i> ≤ 0.5, there appears a&#xa0;high-amplitude deformation zone, which corresponds to the site of future specimen failure.</p>

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Structure and deformation behavior in stainless/carbon steel composite

  • 期刊论文

  • 发表日期：

    2025年2月1日

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  • D. V. Orlova,
  • G. V. Shlyakhova,
  • M. V. Nadezhkin

摘要

Digital image correlation (DIC) is used to analyze local strain distribution in bimetal composite specimens produced by electron beam additive manufacturing from low-carbon steel and austenitic stainless steel in the as-built state and after its annealing at 680 °C and 950 °C. It is found out that plastic deformation tends to localize in each layer of the composites according to the loading stages. The yield stage (n = 0) and the related Lüders deformation are suppressed. In the parabolic hardening stage (n = 0.5), the local elongation strain εxx is observed to form a stationary periodic distribution of localized strain zones. At n ≤ 0.5, there appears a high-amplitude deformation zone, which corresponds to the site of future specimen failure.