Effect of Tantalum on the Impact Toughness of 12% Cr Steels Subjected to Thermomechanical Treatment
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Abstract
Abstract The effect of tantalum on the impact toughness of 12% Cr steels with different tantalum content (12CrTaNb and 12CrNb) was investigated in impact tests in the temperature range from –40 to +120°C with determining the ductile-brittle transition temperature as the temperature in the middle between the upper and lower shelf energies. Both 12% Cr steels were thermomechanically treated by alternating 1050°C annealing and forging in addition to standard normalizing treatment with high-temperature tempering. It was found that for Ta-alloyed 12% Cr steel, the total fracture toughness versus temperature curve is 30–50 J/cm2 higher across the entire temperature range, including the upper and lower shelf energies, and the ductile-brittle transition temperature is 10°С lower. The main structural parameters of Ta-alloyed 12% Cr steel which can have a beneficial effect on toughness are a smaller prior austenite grain size, a larger average size but lower density of M23C6 carbide particles along low-angle martensite lath boundaries, and a larger volume fraction of VX carbonitrides.
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Research context
OpenAlex topics: Nuclear Materials and Properties · Microstructure and Mechanical Properties of Steels · Advanced materials and composites
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References (21)
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1. Kern, T.U., Staubli, M., and Scarlin, B., The European Efforts in Material Development for 6508C USC Power Plants—COST522, ISIJ Int., 2002, vol. 242, pp. 1515–1519.10.2355/isijinternational.42.1515 ↗
2. Abe, F., Kern, T.-U., and Viswanathan, R., Creep-Resistant Steels, Cambridge: Woodhead Publishing, 2008.10.1533/9781845694012 ↗
3. Bladesha, H.K.D.H., Design of Ferritic Creep-Resistant Steels, ISIJ Int., 2001, vol. 41, pp. 626–640. https://doi.org/10.2355/isijinternational.41.62610.2355/isijinternational.41.626 ↗
4. Kaibyshev, R.O., Skorobogatikh, V.N., and Shchenkova, I.A., New Martensitic Steels for Fossil Power Plant: Creep Resistance, PMM, 2010, vol. 109, no. 2, pp. 186–200.
5. Trukhnii, A.D., Kostyuk, A.G., and Troyanovskii, B.M., Ways for Improving Steam-Turbine Installations in Russia and the Advisability of Creating a Pilot Power-Generating Unit Having Extra-High Steam Parameters, Therm. Eng., 1997, vol. 44, no. 1, pp. 1–7.
6. Skorobogatykh, V.N. and Shchenkova, I.A., Development and Exploitation of Materials for Ultra-Supercritical Parameter Units, Energonadz. Energobezop., 2008, no. 1, pp. 56–59.
7. Nikitin, I., Fedoseeva, A., and Kaibyshev, R., Strengthening Mechanisms of Creep-Resistant 12% Cr–3% Co Steel with Low N and High B Contents, J. Mater. Sci., 2020, vol. 55, no. 17, pp. 7530–7545. https://doi.org/10.1007/s10853-020-04508-710.1007/s10853-020-04508-7 ↗
8. GOST 18968-73. Corrosion-Resistant and High Temperature Steel Rods and Strips for Steam Turbine Blades. Technical Specification, Moscow: Izd-vo Standartov, 1974.
9. Byun, T.S., Hoelzer, D.T., Kim, J.H., and Maloy, S.A., A Comparative Assessment of the Fracture Toughness Behavior of Ferritic-Martensitic Steels and Nanostructured Ferritic Alloys, J. Nucl. Mater., 2017, vol. 484, pp. 157–167. https://doi.org/10.1016/j.jnucmat.2016.12.00410.1016/j.jnucmat.2016.12.004 ↗
10. Chatterjee, A., Chakrabarti, D., Moitra, A., Mitra, R., and Bhaduri, A., Effect of Normalization Temperatures on Ductile-Brittle Transition Temperature of a Modified 9Cr–1Mo Steel, Mater. Sci. Eng. A, 2014, vol. 618, pp. 219–231. http://dx.doi.org/10.1016/j.msea.2014.09.02110.1016/j.msea.2014.09.021 ↗
11. Odnobokova, M.V., Kipelova, A.Yu., Belyakov, A.N., and Kaibyshev, R.O., Mechanical Behavior and Brittle-Ductile Transition of High-Chromium Martensitic Steel, PMM, 2016, vol. 117, no. 4, pp. 390–398.
12. Dudko, V., Fedoseeva, A., and Kaibyshev, R., Ductile-Brittle Transition in a 9% Cr Heat-Resistant Steel, Mater. Sci. Eng. A, 2017, vol. 682, pp. 73–84. http://dx.doi.org/10.1016/j.msea.2016.11.03510.1016/j.msea.2016.11.035 ↗
13. Chernov, V.M., Ermolaeva, G.N., and Leont’eva-Smirnova, M.V., Impact Toughness of EK-181 Ferritic-Martensitic Chromium (12%) Steel under Loading by Concentrated Bending, Tech. Phys., 2010, vol. 55, no. 7, pp. 985–990. https://doi.org/10.1134/S106378421007011X10.1134/S106378421007011X ↗
14. Borisova, J., Dudko, V., Mishnev, R., and Kaibyshev, R., Effect of Laves Phase on Ductile-Brittle Transition of 12 pct Cr Steel, Metall. Mater. Trans. A, 2019, vol. 50, pp. 3528–3543. https://doi.org/10.1007/s11661-019-05269-y10.1007/s11661-019-05269-y ↗
15. Mishnev, R., Dudova, N., Dudko, V., and Kaibyshev, R., Impact Toughness of a 10% Cr Steel with High Boron and Low Nitrogen Contents, Mater. Sci. Eng. A, 2018, vol. 730, no. 1–9, p. 42. https://doi.org/10.1016/j.msea.2018.05.10310.1016/j.msea.2018.05.103 ↗
16. Fedoseeva, A., Nikitin, I., Dudova, N., Hald, J., and Kaibyshev, R., Effect of the Thermo-Mechanical Processing on the Impact Toughness of a 12% Cr Martensitic Steel with Co, Cu, W, Mo and Ta Doping, Metals, 2022, vol. 12, p. 3. https://doi.org/10.3390/met1201000310.3390/met12010003 ↗
17. Fedoseeva, A., Dudova, N., and Kaibyshev, R., Role of Tungsten in the Tempered Martensite Embrittlement of a Modified 9%Cr Steel, Metall. Mater. Trans. A, 2017, vol. 48, no. 3, pp. 982–998. https://doi.org/10.1007/s11661-016-3926-410.1007/s11661-016-3926-4 ↗
18. Tkachev, E. and Belyakov, A., Effect of Heat Treatment on Microstructure and Mechanical Properties of an Advanced Ta-Alloyed 9%Cr Steel, in Proc. EPRI’s 9th Int. Conf. on Advances in Materials Technology for Fossil Power Plants and the 2nd Int. 123HiMAT Conf. on High-Temperature Materials, Oct. 21–24, 2019, Nagasaki, Japan: Elect. Power Res. Inst., 2019, pp. 116–122.10.31399/asm.cp.am-epri-2019p0116 ↗
19. Briant, C.L. and Banerji, S.K., Intergranular Failure in Steel: The Role of Grain-Boundary Composition, Int. Met. Rev., 1978, vol. 4, pp. 164–195.
20. Harrelson, K.J., Rou, S.H., and Wilcox, R.C., Impurity Element Effects on the Toughness of 9Cr-1Mo Steel, J. Nucl. Mater., 1986, vol. 141–143, pp. 508–512. https://doi.org/10.1016/S0022-3115(86)80091-510.1016/S0022-3115(86)80091-5 ↗
21. Hu, J., Liu, K., Ma, L., Misra, R.D.K., Zhang, W., Du, H., and Xu, W., Significant Improvement in Strength and Toughness of Nanoscale Precipitate-Strengthened Steel by Direct Quenching and Tempering Process, Steel Res. Int., 2021, vol. 92, p. 2000331. https://doi.org/10.1002/srin.20200033110.1002/srin.202000331 ↗