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CREEP RUPTURE LIFE OF PRE-STRAINED SUPERALLOY N07080

Journal: International Journal of Advanced Research (Vol.9, No. 10)

Publication Date:

Authors : ;

Page : 1167-1176

Keywords : Creep Pre-Strained Superalloy Warm Rolling Partial Recrystallization Necklace Structure;

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Abstract

The creep of the pre-strained superalloy N07080 is described in this work. The pre-strain was achieved by warm rolling at 1050 oC.-The warm rolling was performed due to additional strengthening, i.e increasing of the superalloy hardness.-The pre-strain drastically reduces the creep rupture life of the superalloy compared to the creep rupture life of the standard heat treated superalloy.-The drastic reductionof the creep rupture life is result of rapid creep cavity nucleation on stress concentration sites along primary grain boundaries of the pre-strained superalloy.-Recrystallization eliminates potential sites for rapid cavity nucleation and prolongates the creep rupture life.

Last modified: 2021-12-03 18:46:55