Skip to main content
placeholder image

Effects of cold rolling on the precipitation kinetics and the morphology evolution of intermediate phases in Inconel 718 alloy

Journal Article


Abstract


  • Abstract Isochronal DSC measurements of various degrees cold-rolled Inconel 718 alloy samples were implemented to investigate the effect of cold rolling on the precipitation kinetics of intermediate phases in Inconel 718 alloy. The result shows that the values of the onset temperature (Formula presented.), the peak temperature (Formula presented.) and the end temperature (Formula presented.) of �����-phase precipitation decrease as the degree of cold rolling increases. In contrast, all values of the onset temperature (Formula presented.) , the peak temperature (Formula presented.) and the end temperature (Formula presented.) of ��-phase precipitation first increase and then decrease with the degree of cold rolling increasing as a consequence of a combined effect of lack of Nb atoms and recrystallization. Two sets of isothermal aging experiments were also carried out to study the effect of cold rolling on the morphology evolution of �����-phase and ��-phase in Inconel 718 alloy. It is found that cold rolling promotes ����� ��� �� transformation and the morphology of �����-phase turns more globular as the degree of cold rolling increases for the cold-rolled Inconel 718 alloy samples with isothermal aging at 800 ��C for 8 h (procedure A). Moreover, for the cold-rolled Inconel 718 alloy samples with isothermal aging at 950 ��C for 6 h (procedure B), cold rolling facilitates ��-phase precipitation and the ��-phase particles gradually sphericalized with increase in the degree of cold rolling.

Publication Date


  • 2015

Citation


  • Mei, Y., Liu, Y., Liu, C., Li, C., Yu, L., Guo, Q., & Li, H. (2015). Effects of cold rolling on the precipitation kinetics and the morphology evolution of intermediate phases in Inconel 718 alloy. Journal of Alloys and Compounds, 649, 949-960. doi:10.1016/j.jallcom.2015.07.149

Scopus Eid


  • 2-s2.0-84938614144

Start Page


  • 949

End Page


  • 960

Volume


  • 649

Issue


Place Of Publication


Abstract


  • Abstract Isochronal DSC measurements of various degrees cold-rolled Inconel 718 alloy samples were implemented to investigate the effect of cold rolling on the precipitation kinetics of intermediate phases in Inconel 718 alloy. The result shows that the values of the onset temperature (Formula presented.), the peak temperature (Formula presented.) and the end temperature (Formula presented.) of �����-phase precipitation decrease as the degree of cold rolling increases. In contrast, all values of the onset temperature (Formula presented.) , the peak temperature (Formula presented.) and the end temperature (Formula presented.) of ��-phase precipitation first increase and then decrease with the degree of cold rolling increasing as a consequence of a combined effect of lack of Nb atoms and recrystallization. Two sets of isothermal aging experiments were also carried out to study the effect of cold rolling on the morphology evolution of �����-phase and ��-phase in Inconel 718 alloy. It is found that cold rolling promotes ����� ��� �� transformation and the morphology of �����-phase turns more globular as the degree of cold rolling increases for the cold-rolled Inconel 718 alloy samples with isothermal aging at 800 ��C for 8 h (procedure A). Moreover, for the cold-rolled Inconel 718 alloy samples with isothermal aging at 950 ��C for 6 h (procedure B), cold rolling facilitates ��-phase precipitation and the ��-phase particles gradually sphericalized with increase in the degree of cold rolling.

Publication Date


  • 2015

Citation


  • Mei, Y., Liu, Y., Liu, C., Li, C., Yu, L., Guo, Q., & Li, H. (2015). Effects of cold rolling on the precipitation kinetics and the morphology evolution of intermediate phases in Inconel 718 alloy. Journal of Alloys and Compounds, 649, 949-960. doi:10.1016/j.jallcom.2015.07.149

Scopus Eid


  • 2-s2.0-84938614144

Start Page


  • 949

End Page


  • 960

Volume


  • 649

Issue


Place Of Publication