Effect of Annealing Temperature on Microstructures and Properties of Warmly Deformed SCRAM Steel

Abstract:

Effect of annealing temperature on microstructures and properties of warmly deformed SCRAM (Super-clean Reduced Activation Martensitic) steel on Gleeble-3500 thermo-simulation machine was investigated. The results showed that an increase in the annealing temperature can result in increasing the martensitic lath width from 0.48 um to 0.65 um and decreasing the dislocation density from 6.4×10¹⁵ m^-2 to 2.8×10¹⁵ m^-2 in SCRAM steel. The specimen exhibited high reduction of area and total elongations when the annealing temperature is up to 600 oC. The tensile fracture surface observation indicated that dimples became more uniform and deeper and cleavage fracture traces disappeared with the annealing temperature increasing. The irradiation-induced helium bubbles and hardening were observed in all the specimens after helium implantation to 1e + 17/cm² at 450 oC. The helium bubbles became larger but less when the annealing temperature increased. The optimal annealing temperature is 450 oC in this experiment.

• Periodical: Applied Mechanics and Materials (Volume 575)
• Pages: 315-321
• DOI: https://doi.org/10.4028/www.scientific.net/AMM.575.315
• Online since: June 2014
• Authors: Yang Mou, Li Hong Xue*, Qi Lai Zhou, Cai Xuan Lu, Jin Ping Suo, Li Ping Guo, You Wei Yan
• Keywords: Annealing Temperature, Dislocation Density, Helium Bubbles, Martensitic Lath Width, Nanoindentation Hardness, Warm Deformation

References

[1] Yu JN, Huang QY, Wan FR. Research and development on the China low activation martensitic steel (CLAM). J Nucl Mater 2007; 367: 97-101.

DOI: 10.1016/j.jnucmat.2007.03.236

[2] H. Tanigawa, K. Shiba, H. Sakasegawa, et al., Fus. Eng. Des. 86 (2011) 2549–2552.

[3] A. Kimura, R. Kasada, A. Kohyama, et al., J. Nucl. Mater. 367–370 (2007) 60–67.

[4] N. Baluc, D.S. Gelles, S. Jitsukawa, et al., J. Nucl. Mater. 367–370 (2007) 33–41.

[5] Q. Huang, C. Li, et al., J. Nucl. Mater. 367–370 (2007) 142–146.

[6] X. S. Xiong, F. Yang, X. R. Zou, et al., J. Nucl. Mater. 430 (2012) 114-118.

[7] R.L. Klueh, D.S. Gelles, S. Jitsukawa et al., J. Nucl. Mater. 307-311 (2002) 455.

[8] A. Kimura, R. Kasada, K. Morishita, et al., J. Nucl. Mater. 307-311 (2002) 521-526.

[9] Z. Q. Cui, Y. C. Xun, Metallography and Heat Treatment, secnnd ed., Metallurgical Industry Press, Beijing, (2007).

[10] W.C. Oliver, G.M. Pharr, J. Mater. Res. 7 (1992) 1564.

[11] J. Pěsička, R. Kužul, A. Dronhofer, G. Eggeler, Acta Mater. 51 (2003) 4847-4862.

[12] D. Rojas, J. Garcia, O. Prat et al., Mater. Sci. Eng. A528 (2011) 1372-1381.

[13] K. Takasawa, R. Ikeda et al., Int J Hydrogen Energy 37 (2012) 2669-2675.

[14] B. Hoffmann, O. Vӧhringer , E. Macherauch, Mater. Sci. Eng. A319–321 (2001) 299-303.

[15] N. Saeidi, A. Ekrami, Mater. Sci. Eng. A527 (2010) 5575-5581.

[16] J. Henry, M. -H. Mathon, P. Jung, J. Nucl. Mater. 318 (2003) 249-259.

[17] S. Fréchard, M. Walls, M. Kociak, et al., J. Nucl. Mater. 393 (2009) 102-107.