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Effect of cold rolling and first precipitates on the coarsening behavior of �����-phases in Inconel 718 alloy

Journal Article


Abstract


  • The coarsening behaviors of �����-phase particles in Inconel 718 alloy aged at 750, 800, and 850��C were investigated by scanning electron microscopy (SEM). Detailed observations and quantitative measurements were conducted to characterize the coarsening behavior of the ��?-phase under various aging conditions. The experimental results indicate that the existence of the ��-phase retards the formation and coarsening of the �����-phase, without influencing its final particle size or amount. Moreover, when cold rolled with a reduction of 50%, the dimensions of the ����� particles in Inconel 718 alloy decrease with increasing aging time. Furthermore, the coarsening behavior of the �����-phase in the Inconel 718 alloy after a normal aging treatment (sample A) and that of the primary ��-phase (sample B) follow the Lifshitz���Slyozov���Wagner (LSW) diffusion-controlled growth theory; the thus-obtained activation energies for the �����-phase are 292 kJ��mol-1 and 302 kJ��mol-1, respectively.

Publication Date


  • 2016

Citation


  • Zhang, J. L., Guo, Q. Y., Liu, Y. C., Li, C., Yu, L. M., & Li, H. J. (2016). Effect of cold rolling and first precipitates on the coarsening behavior of �����-phases in Inconel 718 alloy. International Journal of Minerals, Metallurgy and Materials, 23(9), 1087-1096. doi:10.1007/s12613-016-1326-9

Scopus Eid


  • 2-s2.0-84984876982

Start Page


  • 1087

End Page


  • 1096

Volume


  • 23

Issue


  • 9

Place Of Publication


Abstract


  • The coarsening behaviors of �����-phase particles in Inconel 718 alloy aged at 750, 800, and 850��C were investigated by scanning electron microscopy (SEM). Detailed observations and quantitative measurements were conducted to characterize the coarsening behavior of the ��?-phase under various aging conditions. The experimental results indicate that the existence of the ��-phase retards the formation and coarsening of the �����-phase, without influencing its final particle size or amount. Moreover, when cold rolled with a reduction of 50%, the dimensions of the ����� particles in Inconel 718 alloy decrease with increasing aging time. Furthermore, the coarsening behavior of the �����-phase in the Inconel 718 alloy after a normal aging treatment (sample A) and that of the primary ��-phase (sample B) follow the Lifshitz���Slyozov���Wagner (LSW) diffusion-controlled growth theory; the thus-obtained activation energies for the �����-phase are 292 kJ��mol-1 and 302 kJ��mol-1, respectively.

Publication Date


  • 2016

Citation


  • Zhang, J. L., Guo, Q. Y., Liu, Y. C., Li, C., Yu, L. M., & Li, H. J. (2016). Effect of cold rolling and first precipitates on the coarsening behavior of �����-phases in Inconel 718 alloy. International Journal of Minerals, Metallurgy and Materials, 23(9), 1087-1096. doi:10.1007/s12613-016-1326-9

Scopus Eid


  • 2-s2.0-84984876982

Start Page


  • 1087

End Page


  • 1096

Volume


  • 23

Issue


  • 9

Place Of Publication