Nanotopography and grain-boundary migration in the vicinity of triple junctions

Finite Element Analysis of Elastic Stress and the Resolved Shear Stress in the Primary Slip System of a Copper Tricrystal

“…The general characteristic of the stress distribution is similar to each other in the two loading conditions. This means that the characteristic of the stresses depending on q is essentially in correspondence with ' ij (q) in equation (1). However, the l values for the stresses on the sample surface varying along L 1 , L 2 and L 3 (seen Fig.…”

“…In addition, there are some uncertainties in the expression of equation (1). For example, there is no clear criterion to determine the l value when a specific tricrystal material is considered.…”

“…The triple junction of grain boundaries is a crystal defect which is currently the least understood [1]. With the reduction of the grain size, the volume fraction of the triple junction becomes higher and plays a more significant role in the deformation and fracture of materials.…”

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“…The values of the rate of change of areaȦ TJ of the half-loop grain and the dynamic triple junction angle β d as a function of the half-loop width w for the triple junction with grain boundary ab misorientation θ = 38.2 Table 2. The tabulated values of the extracted rate of change of area of the half-loop grainȦ b (extracted from bi-crystal simulations [13]), the rate of change of area grain a during the triple junction migrationȦ TJ and the dynamic and statiac triple junction angle β d and β s and the calculated values of sim and an as a function of the grain boundary ab misorientations θ .…”

“…Experimental and theoretical studies by Galina et al [11,12] focussed on determining the conditions under which triple junction mobility affects grain boundary migration. Lazarenko et al [13] examined the grain boundary orientations in the vicinity of triple junction in the early stages of recrystallization of tungsten. Interestingly, they found that in the deformed state, the triple junction angle distribution showed peaks at π/2, 2π/3 and π.…”