Uni-axial and multi-axial creep behaviour of P91-type steel under constant load

Microstructure and creep characteristics of dissimilar T91/TP316H martensitic/austenitic welded joint with Ni-based weld metal

“…In addition, the recent study of Blagoeva et al [28] on the small punch creep testing of P91 welds also confirmed the highest degradation of creep resistance within their fine-grained ICHAZ regions. It is noticeable that the n values of T91 steel weldment obtained in present work as well as in the study of Gaffard et al [27] are significantly lower than the n values reported for P/T91 base steels [29][30][31][32][33]. This observation can be related to the thermal degradation of microstructure within the HAZ regions of P/T91 steel weldments compared to the base materials.…”

The relationship between the Uniaxial Creep Test and the Small Punch Creep Test of the AZ31 magnesium alloy

“…Another important difference with the UCT is that the stress distribution in SPCT changes throughout the test because of a redistribution of the stresses in the specimen [26]. Moreover, in the SPCT specimens, initial plastic deformations appear at the moment when the load is applied, and it causes a large number of dislocations [27,28] compared to the Uniaxial Creep Test. This effect can be also observed in the creep curves, where it can be observed that the primary creep in SPCT's is larger than in UCT's.…”

Influence of pipe hangers on creep damage of Main-Steam Pipe Containing Defects

“…Generally considered, the creep process include the hardening and creep damage mechanism [7][8][9][10], i.e. A is the material constant, n is the stress exponent, and m is the time-hardening exponent.…”