CREEP RUPTURE LIFE OF PRE-STRAINED SUPERALLOY N07080Journal: International Journal of Advanced Research (Vol.9, No. 10)
Publication Date: 2021-10-13
Authors : Omer Beganovic;
Page : 1167-1176
Keywords : Creep Pre-Strained Superalloy Warm Rolling Partial Recrystallization Necklace Structure;
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.
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