A crystal plasticity investigation of slip system interaction, GND density and stored energy in non-proportional fatigue in Nickel-based superalloy

Slip band interactions and GND latent hardening in a galling resistant stainless steel

“…Since the key difference between the simulation and the model is the absence of discrete slip activity (as the CPFE model homogenises this effect) the interaction of slip bands is the probable cause of this highly localised behaviour. These slip system interaction effects have been examined in an separate study, applying the same crystal plasticity modelling framework as this work to examine the nickel-base superalloy RR1000 [48]. This investigation in RR1000 demonstrates similar behaviour with slip band interactions resulting in latent hardening and quantifies localised peaks in GND density.…”

A dual-scale modelling approach for creep-fatigue crack initiation life prediction of holed structure in a nickel-based superalloy

“…17b visually shows that the fatigue damage is almost independent of hold time effect, while creep damage significantly increases with increasing hold times. From the perspective of micro-scale, Figure 18a gives the evolutional contour of energy dissipation with the number of cycles for the typical specimen H8, which owns potential capabilities in reflecting damage evolution process as well as identifying crack initiation sites [13,33,75]. The maximum accumulated energy dissipation was located position with a certain distance of several grain lengths from the holed root, which was defined as the hotspot in Fig.…”

Study on Microstructure and In Situ Tensile Deformation Behavior of Fe-25Mn-xAl-8Ni-C Alloy Prepared by Vacuum Arc Melting

“…This indicates that dislocations in austenite grains begin to slip. According to the relevant data, it is determined to be basal slip [27,28]. When the strain increases to 4.0%, the stress increases to 626.2 MPa.…”