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Microstructure evolution and martensitic transformation behaviors of 9Cr–1.8W–0.3Mo ferritic heat-resistant steel during quenching and partitioning treatment

  • Linqing Xu (a1), Zesheng Yan (a1), Yongchang Liu (a1), Huijun Li (a1), Baoqun Ning (a2) and Zhixia Qiao (a3)...


The advanced quenching and partitioning (Q&P) heat treatment has been applied to 9Cr–1.8W–0.3Mo heat resistant steel. The phase transformation during Q&P is measured by a high-resolution differential dilatometer by which the accurate information can be obtained. The transmission electron microscope examination was conducted to study the microstructure evolution after Q&P, and the refined carbon-enriched martensite laths, which were produced during the second martensitic transformation, were observed. The thermodynamics of carbon partitioning was described by a paraequilibrium model according to which the partitioning of carbon from martensite into austenite can be proved. A kinetic model for the second martensitic transformation was developed with the parameters discussed in details. The retardation of onset and end temperature of the second martensitic transformation can be ascribed to the austenite stabilization caused by carbon enrichment.


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1.Ennis, P. and Czyrska-Filemonowicz, A.: Recent advances in creep-resistant steels for power plant applications. Sadhana 28(3–4), 709 (2003).
2.Ning, B.Q., Shi, Q.Z., Yan, Z.S., Fu, J.C., Liu, Y.C., and Bie, L.J.: Variation of martensite phase transformation mechanism in minor-stressed T91 ferritic steel. J. Nucl. Mater. 393(1), 54 (2009).
3.Zhao, L., Jing, H., Xu, L., An, J., Xiao, G., Xu, D., Chen, Y., and Han, Y.: Investigation on mechanism of type IV cracking in P92 steel at 650° C. J. Mater. Res. 26(7), 934 (2011).
4.Shanthraj, P. and Zikry, M.: The effects of microstructure and morphology on fracture nucleation and propagation in martensitic steel alloys. Mech. Mater. (2012).
5.Lu, Z., Faulkner, R., Riddle, N., Martino, F., and Yang, K.: Effect of heat treatment on microstructure and hardness of Eurofer 97, Eurofer ODS and T92 steels. J. Nucl. Mater. 386, 445 (2009).
6.Abe, F.: Effect of quenching, tempering, and cold rolling on creep deformation behavior of a tempered martensitic 9Cr-1W steel. Metall. Mater. Trans. A 34(4), 913 (2003).
7.Abe, F.: Precipitate design for creep strengthening of 9% Cr tempered martensitic steel for ultra-supercritical power plants. Sci. Technol. Adv. Mater. 9(1), 013002 (2008).
8.Edmonds, D., He, K., Rizzo, F., De Cooman, B., Matlock, D., and Speer, J.: Quenching and partitioning martensite: A novel steel heat treatment. Mater. Sci. Eng., A 438, 25 (2006).
9.Li, H., Lu, X., Wu, X., Min, Y., and Jin, X.: Bainitic transformation during the two-step quenching and partitioning process in a medium carbon steel containing silicon. Mater. Sci. Eng., A 527(23), 6255 (2010).
10.Clarke, A., Speer, J., Miller, M., Hackenberg, R., Edmonds, D., Matlock, D., Rizzo, F., Clarke, K., and De Moor, E.: Carbon partitioning to austenite from martensite or bainite during the quench and partition (Q&P) process: A critical assessment. Acta Mater. 56(1), 16 (2008).
11.De Moor, E., Lacroix, S., Clarke, A., Penning, J., and Speer, J.: Effect of retained austenite stabilized via quench and partitioning on the strain hardening of martensitic steels. Metall. Mater. Trans. A 39(11), 2586 (2008).
12.Kobayashi, J., Song, S-M., and Sugimoto, K-I.: Microstructure and retained austenite characteristics of ultra high-strength TRIP-aided martensitic steels. ISIJ Int. 52(6), 1124 (2012).
13.Kühn, U., Romberg, J., Mattern, N., Wendrock, H., and Eckert, J.: Transformation-induced plasticity in Fe-Cr-VC. J. Mater. Res. 25(2), 368 (2010).
14.Speer, J.G., Edmonds, D.V., Rizzo, F.C., and Matlock, D.K.: Partitioning of carbon from supersaturated plates of ferrite, with application to steel processing and fundamentals of the bainite transformation. Curr. Opin. Solid State Mater. Sci. 8(3), 219 (2004).
15.Liu, Y., Sommer, F., and Mittemeijer, E.J.: Abnormal austenite–ferrite transformation behaviour in substitutional Fe-based alloys. Acta Mater. 51(2), 507 (2003).
16.Mittemeijer, E.J.: Fundamentals of Materials Science: The Microstructure–Property Relationship Using Metals as Model Systems (Springer-Verlag, Heidelberg, 2010).
17.Wang, X., Zhong, N., Rong, Y., Hsu, T., and Wang, L.: Novel ultrahigh-strength nanolath martensitic steel by quenching–partitioning–tempering process. J. Mater. Res. 24(1), 261 (2009).
18.Chen, H., Appolaire, B., and van der Zwaag, S.: Application of cyclic partial phase transformations for identifying kinetic transitions during solid-state phase transformations: Experiments and modeling. Acta Mater. 59(17), 6751 (2011).
19.Speer, J., Matlock, D., De Cooman, B., and Schroth, J.: Carbon partitioning into austenite after martensite transformation. Acta Mater. 51(9), 2611 (2003).
20.Hultgren, A.: Isothermal transformation of austenite. Trans. ASM. 39(973), 54 (1947).
21.Apple, C., Caron, R., and Krauss, G.: Packet microstructure in Fe-0.2 pct C martensite. Metall. Mater. Trans. B 5(3), 593 (1974).
22.Guimarães, J. and Rios, P.: Unified model for plate and lath martensite with athermal kinetics. Metall. Mater. Trans. A 41(8), 1928 (2010).
23.Morito, S., Saito, H., Ogawa, T., Furuhara, T., and Maki, T.: Effect of austenite grain size on the morphology and crystallography of lath martensite in low carbon steels. ISIJ Int. 45(1), 91 (2005).
24.Gao, Q.Z., Liu, Y.C., Di, X.J., Yu, L.M., and Yan, Z.S.: Martensite transformation in the modified high Cr ferritic heat-resistant steel during continuous cooling. J. Mater. Res. 27(21), 2779 (2012).
25.Avrami, M.: Kinetics of phase change. I. General theory. J. Chem. Phys. 7, 1103 (1939).
26.Avrami, M.: Kinetics of phase change. II: Transformation-time relations for random distribution of nuclei. J. Chem. Phys. 8, 212 (1940).
27.Van Bohemen, S. and Sietsma, J.: Martensite formation in partially and fully austenitic plain carbon steels. Metall. Mater. Trans. A 40(5), 1059 (2009).
28.Foroozmehr, F., Najafizadeh, A., and Shafyei, A.: Effects of carbon content on the formation of nano/ultrafine grained low-carbon steel treated by martensite process. Mater. Sci. Eng., A 528(18), 5754 (2011).
29.Bowles, J. and Dunne, D.: The role of plastic accommodation in the (225) martensite transformation. Acta Metall. 17(5), 677 (1969).
30.Bokros, J. and Parker, E.: The mechanism of the martensite burst transformation in Fe–Ni single crystals. Acta Metall. 11(12), 1291 (1963).
31.Ren, X., Miura, N., Zhang, J., Otsuka, K., Tanaka, K., Koiwa, M., Suzuki, T., Chumlyakov, Y.I., and Asai, M.: A comparative study of elastic constants of Ti–Ni-based alloys prior to martensitic transformation. Mater. Sci. Eng., A 312(1), 196 (2001).


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Microstructure evolution and martensitic transformation behaviors of 9Cr–1.8W–0.3Mo ferritic heat-resistant steel during quenching and partitioning treatment

  • Linqing Xu (a1), Zesheng Yan (a1), Yongchang Liu (a1), Huijun Li (a1), Baoqun Ning (a2) and Zhixia Qiao (a3)...


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