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Effect of Impact Toughness Anisotropy on Brittle Fracture Resistance Characteristics of High-Strength Steels Subjected to Thermomechanical Treatment

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The structure and mechanical properties under tension and impact bending of eleven batches of high-strength manganese-containing steels (Mn-steels) containing 0.09 to 0.14 wt.% Ti subjected to thermomechanical rolling were studied in the temperature range from –60 to +20 °С. It was found that the values of the coefficient of impact toughness anisotropy in the range of Ka = 2.0–4.9 increase at higher titanium content and decrease at higher aluminum content. The difference between ductile-to-brittle transition temperatures T50 and T34 for longitudinal and transverse KCV samples increases at higher contents of titanium, aluminum, sulfur, and carbon. This effect is caused by an earlier nucleation and growth of large dimples of ductile fracture around sizable inclusions preferentially located in the direction of rolling.

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References

  1. Ye. A. Goli-Oglu, L. I. Efron, and Yu. D. Morozov, “Improving the efficiency of thermomechanical treatment of micro-alloyed pipe steels,” Stal’, No. 2, 52–57 (2013).

    Google Scholar 

  2. T. Tanaka, “Science and technology of hot rolling process of steel,” Microalloying’95 Conference Proceedings (1995), pp. 165–182.

  3. C. Quchi, T. Sampei, and I. Kozasu, “The effect of hot rolling condition and chemical composition on the Quest temperature of γ → α transformation after hot rolling,” Transactions ISIY, 22, 214–222 (1982).

    Article  Google Scholar 

  4. Yu. D. Morozov, I. F. Pemov, Ye. A. Goli-Oglu, and D. V. Nizhelskii, “Effect of the semi-finished rolled stock cooling rate during controlled rolling on the condition of hot-deformed austenite, final microstructure, and mechanical properties of micro-alloyed steel. Part 1,” Metallurg, No. 2, 70–77 (2012).

    Google Scholar 

  5. L. I. Efron, Yu. D. Morozov, and Ye. A. Goli-Oglu, “Effect of temperature conditions of controlled rolling on the structural state of hot-deformed austenite and properties of low-carbon micro-alloyed steel,” Stal’, No. 5, 60–65 (2012).

    Google Scholar 

  6. L. I. Efron, Yu. D. Morozov, and Ye. A. Goli-Oglu, “Effect of controlled rolling conditions on the structure refinement and combination of mechanical properties of low-carbon micro-alloyed steels,” Stal’, No. 5, 67–72 (2011).

    Google Scholar 

  7. V. M. Goritskii, M. A. Lushkin, and O. V. Goritskii, “Anisotropy of impact toughness of structural steels with ferrite-pearlite structure tested according to the Charpy method,” Deformatsiya i Razrusheniye Materialov, No. 3, 43–48 (2013).

    Google Scholar 

  8. V. M. Goritskii, M. A. Lushkin, O. V. Goritskii, and G. R. Shneiderov, “Effect of the structural factors on anisotropy of impact toughness of rolled ferrite-pearlite steel products,” Deformatsiya i Razrusheniye Materialov, No. 8, 16–21 (2014).

    Google Scholar 

  9. A. G. Glebov, M. A. Stremel’, and K. L. Kosyrev, “Areas of impurity influence on impact toughness of thick-gauge steel plate,” Stal’, No. 5, 95–97 (2004).

    Google Scholar 

  10. V. M. Goritskii, G. R. Shneiderov, and I. A. Guseva, “Effect of chemical composition and structure on mechanical properties of low-alloyed weldable steels after thermomechanical rolling,” Metallurg, No. 5, 49–55 (2016).

    Google Scholar 

  11. V. M. Goritskii, G. R. Shneiderov, and I. A. Guseva, “Study of impact toughness anisotropy and delamination tendency of Strenx 650 MC and 700 MC steels after thermomechanical rolling,” Metallurg, No. 8, 29–38 (2018).

    Google Scholar 

  12. EN 10025-4:2004, “Hot Rolled Products of Structural Steels,” Part 4. Technical Delivery Conditions for Thermomechanical Rolled Weldable Fine Grain Structural Steels.

  13. V. M. Goritskii, G. R. Shneiderov, and I. A. Guseva, “Effect of chemical composition and structure on mechanical properties of high-strength weldable steels,” Metallurg, No. 1, 18–24 (2019).

    Google Scholar 

  14. V. M. Goritskii, “Structure effect on viscoelastic transition in steels with a BCC lattice,” Metallurg, No. 2, 46–55 (2018).

    Google Scholar 

  15. V. M. Goritskii, Application of Impact Toughness Characteristics in Engineering Practice [in Russian], Metallurgizdat, Moscow (2016).

    Google Scholar 

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Correspondence to V. M. Goritskii.

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Translated from Metallurg, Vol. 64, No. 5, pp. 42–49, May, 2020.

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Goritskii, V.M., Shneiderov, G.R. & Goritskii, O.V. Effect of Impact Toughness Anisotropy on Brittle Fracture Resistance Characteristics of High-Strength Steels Subjected to Thermomechanical Treatment. Metallurgist 64, 425–437 (2020). https://doi.org/10.1007/s11015-020-01012-w

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  • DOI: https://doi.org/10.1007/s11015-020-01012-w

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