Microstructural Evolution of P92 Steel During Long-Term Aging
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The mechanical properties and microstructure evolution of P92 steel were investigated after aging up to 11,000 h at 923 K. Charpy impact and tensile tests were carried out to study the strength and ductility of aged P92 steel. In addition, microstructure evolution of the samples during long-term aging was investigated with X-ray diffraction, optical microscopy and scanning electron microscope (SEM). Then, statistical quantitative image analysis based on SEM images was used to evaluate the precipitation during long-term aging. The mechanical properties were found to be associated with the evolution of precipitation, especially the coarsening of Laves-phase. Results show that the ductility and strength of P92 steel decrease with the growth of Laves-phase during short-term aging (shorter than 1000 h). However, as the aging time further increasing, the ductility and strength of P92 steel decrease slowly with the coarsening of Laves-phase.
KeywordsAging Laves-phase Precipitation and coarsening Mechanical property
The authors gratefully acknowledge the support provided by innovation program for graduate students in Jiangsu Province of China (No. KYLX15_0800).
- 2.P.J. Ennis, A. Czyrska-Filemonowicz, Inżynieria Materiałowa 22(4), 454 (2001)Google Scholar
- 9.D.A. Porter, K.E. Easterling, Phase Transformations in Metals and Alloys (Van Nostrand Reinhold Co. Ltd., New York, 1981), p. 326Google Scholar
- 15.Q.L. Yong, Secondary Phase in Steels (Metallurgical Industry Press, Beijing, 2006), p. 303Google Scholar
- 16.Q.L. Yong, Secondary Phase in Steels (Metallurgical Industry Press, Beijing, 2006), p. 301Google Scholar