Hostname: page-component-8448b6f56d-tj2md Total loading time: 0 Render date: 2024-04-20T12:29:39.340Z Has data issue: false hasContentIssue false
  • English
  • Français

Precipitation behavior of type 347H heat-resistant austenitic steel during long-term high-temperature aging

Published online by Cambridge University Press:  12 November 2015

Yinghui Zhou ,
Yanmo Li ,
Yongchang Liu ,
Qianying Guo ,
Chenxi Liu ,
Liming Yu ,
Chong Li  and
Huijun Li
Yinghui Zhou
Affiliation:
State Key Laboratory of Hydraulic Engineering Simulation and Safety, School of Materials Science & Engineering, Tianjin University, Tianjin 300072, People's Republic of China
Yanmo Li*
Affiliation:
State Key Laboratory of Hydraulic Engineering Simulation and Safety, School of Materials Science & Engineering, Tianjin University, Tianjin 300072, People's Republic of China
Yongchang Liu*
Affiliation:
State Key Laboratory of Hydraulic Engineering Simulation and Safety, School of Materials Science & Engineering, Tianjin University, Tianjin 300072, People's Republic of China
Qianying Guo
Affiliation:
State Key Laboratory of Hydraulic Engineering Simulation and Safety, School of Materials Science & Engineering, Tianjin University, Tianjin 300072, People's Republic of China
Chenxi Liu
Affiliation:
State Key Laboratory of Hydraulic Engineering Simulation and Safety, School of Materials Science & Engineering, Tianjin University, Tianjin 300072, People's Republic of China
Liming Yu
Affiliation:
State Key Laboratory of Hydraulic Engineering Simulation and Safety, School of Materials Science & Engineering, Tianjin University, Tianjin 300072, People's Republic of China
Chong Li*
Affiliation:
State Key Laboratory of Hydraulic Engineering Simulation and Safety, School of Materials Science & Engineering, Tianjin University, Tianjin 300072, People's Republic of China
Huijun Li*
Affiliation:
State Key Laboratory of Hydraulic Engineering Simulation and Safety, School of Materials Science & Engineering, Tianjin University, Tianjin 300072, People's Republic of China
*
a)Address all correspondence to this author. e-mail: licmtju@163.com
Get access

Abstract

The microstructural evolution of type 347H heat-resistant austenitic steel during long-term aging at 700–900 °C was investigated by using a transmission microscope, a scanning electron microscope, and electron energy spectrum technology. The microstructural examination showed the typical micrographs of MX carbonitrides and M23C6 carbides after aging. The existence of the Z phase (NbCrN) at the grain boundaries during aging was identified. Meanwhile, the possible precipitation sequence of these particles was also confirmed. In the beginning of aging, fine Nb(C,N) precipitates first, then, M23C6 carbides precipitate along the grain boundaries. Finally, the Z phase is also observed at the grain boundaries. Moreover, the influence of isothermal holding temperature on the precipitation of MX carbonitrides and M23C6 carbides was discussed. The various microstructural characterizations showed that the M23C6 carbides and MX carbonitrides precipitate more easily with the increase of aging temperature. Furthermore, the number and the size of MX particles and M23C6 carbides increase when the isothermal holding time is prolonged.

Keywords

austenitic heat-resistant steelhigh-temperature agingmicrostructural evolutionthermal stability
Type
Articles
Information
Journal of Materials Research , Volume 30 , Issue 23 , 14 December 2015 , pp. 3642 - 3652
Copyright
Copyright © Materials Research Society 2015 

Access options

Get access to the full version of this content by using one of the access options below. (Log in options will check for institutional or personal access. Content may require purchase if you do not have access.)

References

REFERENCES

Yuan, Y., Zhong, Z.H., Yu, Z.S., Yin, H.F., Dang, Y.Y., Zhao, X.B., Yang, Z., Lu, J.T., Yan, J.B., and Gu, Y.: Microstructural evolution and compressive deformation of a new Ni-Fe base superalloy after long term thermal exposure at 700 °C. Mater. Sci. Eng., A 619, 364 (2014).Google Scholar
Wang, Z.H., Fu, W.T., Wang, B.Z., Zhang, W.H., Lv, Z.Q., and Jiang, P.: Study on hot deformation characteristics of 12%Cr ultra-super-critical rotor steel using processing maps and Zener-Hollomon parameter. Mater. Charact. 61, 25 (2010).Google Scholar
Ha, V.T. and Jung, W.S.: Evolution of precipitate phases during long-term isothermal aging at 1083 K (810 °C) in a new precipitation-strengthened heat-resistant austenitic stainless steel. Metall. Mater. Trans. A 43, 3366 (2012).CrossRefGoogle Scholar
NIMS: Metallographic Atlas of Long-term Crept Materials No. M-5, JIS SUS 347HTB (18Cr-12Ni-nb) (National Institute for Materials Science, Tokyo, Tsukuba, 2006).Google Scholar
Yoshikawa, K., Teranishi, H., Tokimasa, K., Fujikawa, H., Miura, M., and Kubota, K.: Fabrication and properties of corrosion resistant TP347H stainless steel. J. Mater. Eng. 10, 69 (1988).Google Scholar
Chandra, K., Kain, V., and Tewari, R.: Microstructural and electrochemical characterization of heat-treated 347 stainless steel with different phases. Corros. Sci. 67, 118 (2013).CrossRefGoogle Scholar
Hong, S.M., Kim, M.Y., Min, D.J., Lee, K.H., Shim, J.H., Kim, D.I., Suh, J.Y., Jung, W.S., and Choi, I.S.: Unraveling the origin of strain-induced precipitation of M23C6 in the plastically deformed 347 austenite stainless steel. Mater. Charact. 94, 7 (2014).CrossRefGoogle Scholar
Erneman, J., Schwind, M., Andren, H.O., Nilsson, J.O., Wilson, A., and Agren, J.: The evolution of primary and secondary niobium carbonitrides in AISI 347 stainless steel during manufacturing and long-term ageing. Acta Mater. 54, 67 (2006).Google Scholar
Prat, O., Garcia, J., Rojas, D., Carrasco, C., and Kaysser-Pyzalla, A.R.: Investigations on coarsening of MX and M23C6 precipitates in 12%Cr creep resistant steels assisted by computational thermodynamics. Mater. Sci. Eng., A 527, 5976 (2010).CrossRefGoogle Scholar
Padilha, A.F., Machado, I.F., and Plaut, R.I.: Microstructures and mechanical properties of Fe-15%Cr-15%Ni austenitic stainless steels containing different levels of niobium additions submitted to various processing stages. J. Mater. Process. Technol. 170, 89 (2005).Google Scholar
Wang, J.Z., Liu, Z.D., Bao, H.S., and Cheng, S.C.: Evolution of precipitates of S31042 heat resistant steel during 700 °C aging. J. Iron Steel Res. Int. 20, 113 (2013).CrossRefGoogle Scholar
Ha, V.T. and Jung, W.S.: Creep behavior and microstructure evolution at 750 in a new precipitation-strengthened heat-resistant austenitic stainless steel. Mater. Sci. Eng., A 558, 103 (2012).Google Scholar
Jung, J.G., Park, J.S., Kim, J.Y., and Lee, Y.K.: Carbide precipitation kinetics in austenite of a Nb-Ti-V microalloyed steel. Mater. Sci. Eng., A 528, 5529 (2011).Google Scholar
Vach, M., Kunikova, T., Domankova, M., Sevc, P., Caplovic, L., Gogola, P., and Janovec, J.: Evolution of secondary phases in austenitic stainless steels during long-term exposures at 600, 650 and 800 °C. Mater. Charact. 59, 1792 (2008).Google Scholar
Sobral, M.D.C., Mei, P.R., and Kestenbach, H-J.: Effect of carbonitride particles formed in austenite on the strength of microalloyed steels. Mater. Sci. Eng., A 367, 317 (2004).Google Scholar
Pilloni, G., Quadrini, E., and Spigarelli, S.: Interpretation of the role of forest dislocations and precipitates in high-temperature creep in a Nb-stabilised austenitic stainless steel. Mater. Sci. Eng., A 279, 52 (2000).Google Scholar
Tan, L., Byun, T.S., Katoh, Y., and Snead, L.L.: Stability of MX-type strengthening nanoprecipitates in ferritic steels under thermal aging, stress and ion irradiation. Acta Mater. 71, 11 (2014).Google Scholar
Weiss, B. and Stickler, R.: Phase instabilities during high temperature exposure of 316 austenitic stainless steel. Mater. Trans. 3, 851 (1972).Google Scholar
Yoo, O., Oh, Y.J., Lee, B.S., and Nam, S.W.: The effect of the carbon and nitrogen contents on the fracture toughness of type 347 austenitic stainless steels. Mater. Sci. Eng., A 405, 147 (2005).Google Scholar
Chen, S.W., Zhang, C., Xia, Z.X., Ishikawa, H., and Yang, Z.G.: Precipitation behavior of Fe2Nb Laves phase on grain boundaries in austenitic heat resistant steels. Mater. Sci. Eng., A 616, 183 (2014).Google Scholar
Hong, H.U. and Naw, S.W.: Improvement of creep-fatigue life by the modification of carbide characteristics through grain boundary serration in an AISI 304 stainless steel. J. Mater. Sci. 38, 1535 (2003).CrossRefGoogle Scholar
Viherkoski, M., Huttunen-Saarivirta, E., Isotahdon, E., Uusitalo, M., Tianinen, T., and Kuokkala, V-T.: The effect of aging on heat-resistant cast stainless steels. Mater. Sci. Eng., A 589, 189 (2014).CrossRefGoogle Scholar
Sourmail, T.: Precipitation in creep resistant austenitic stainless steels. Mater. Sci. Technol. 17, 1 (2001).CrossRefGoogle Scholar
Hilmar, K.D., John, H., and Somers, M.A.J.: Atomic resolution imaging of precipitate transformation from cubic TaN to tetragonal CrTaN. Scr. Mater. 66, 261 (2012).Google Scholar
Ahmedabadi, P., Kain, V., Gupta, M., Samajdar, I., Sharma, S.C., Bhagwat, P., and Chowdhury, R.: The role of niobium carbide in radiation induced segregation behavior of type 347 austenitic stainless steel. J. Nucl. Mater. 415, 123 (2011).CrossRefGoogle Scholar
Guan, K.S., Xu, X.D., Xu, H., and Wang, Z.W.: Effect of aging at 700°C on precipitation and toughness of AISI 321 and AISI 347 austenitic stainless steel welds. Nucl. Eng. Des. 235, 2485 (2005).Google Scholar