Influence of prior cyclic plasticity on creep deformation using crystal plasticity modelling

The effect of cyclic-loading generated intergranular strains on the creep deformation of a polycrystalline material

“…A mechanistic modelling approach incorporating the underlying mechanisms of plasticity-creep interaction is therefore needed to quantify the creep response changes caused by prior deformation [6]. Several continuum and microstructure based creep models [7][8][9] have been developed which attempt to capture such understanding, however, traditional continuum approaches are limited in their ability to account for the influence of local variations at the inter and intra granular scales [10]. A common approach adopted in analytical [11][12][13] and finite element (FE) models [11,14] for estimating the creep deformation rate of materials under cyclic loading conditions is to use a concept termed "back-stress" to adjust the applied stress.…”

Evaluation of the effect of various prior creep-fatigue interaction damages on subsequent tensile and creep properties of 9%Cr steel

“…Therefore, it is significant to evaluate the effect of prior fatigue loading on remnant tensile and creep properties to ensure the safety of high temperature components. Previous works have revealed that the material tensile and creep properties could be altered by prior LCF loading [8][9][10][11][12][13][14][15][16][17][18][19][20][21][22][23][24][25][26]. However, the studies about the influence of prior C-F loading on subsequent tensile and creep properties are still limited.…”

On the microstructural evolution and room‐temperature creep behaviour of 9%Cr steel weld joint under prior creep–fatigue interaction

“…Many researchers reported that the prior fatigue loading would accelerate the creep rate and reduce the serviced life of Cr-Mo steel. [2][3][4][5] Zhang et al investigated the remnant tension strength and creep flow of prior CF-tested P92 steel and pointed out that the growth of martensitic lath plays a dominated role in the reduction of remnant creep resistance. 6 However, there are still limited studies for creep behaviour of CF-damaged welded joint due to two obstacles.…”