Recent developments in assessing microstructure-sensitive early stage fatigue of polycrystals

Failure of metals II: Fatigue

“…Recent advances have exploited coupling of electron backscatter diffraction (EBSD), scanning electron microscopy (SEM), and digital image correlation (DIC) techniques [110][111][112] to characterise fatigue crack formation in relation to grain size, crystallographic orientation, and nearest neighbour grain interactions. The reader is referred to a recent review for more details [113].…”

In Situ Microscopic Investigation to Validate Acoustic Emission Monitoring

“…The challenge, however, is that damage is a multiscale process particularly when the incubation and initiation phases are concerned, as shown for example in recent investigations on crack formation in metals undergoing fatigue loading [1][2][3]. Detailed considerations of the material's actual microstructure are shown to be crucial to their mechanical behavior during loading, as reported recently in steel [4], aluminum [5][6][7][8][9][10][11], magnesium [12][13][14][15][16], and titanium alloys [17,18] among others [2,3,19,20]. These materials span a range of crystalline structures and contain a number of initial defects from material processing [11], some of which include voids, precipitates, dislocations, and microcracks that can propagate and lead to damage at multiple length scales.…”

3D simulation of short fatigue crack propagation by finite element crystal plasticity and remeshing

“…Simulation techniques of microstructurally small cracks have improved steadily through the last 10 years [18] although it is still a very difficult problem from a numerical point of view. The details of the crack growth mechanisms and grain boundary crossing are still under debate.…”