Experimental examination of displacement and strain fields in an edge dislocation core

X-ray micro-beam characterization of lattice rotations and distortions due to an individual dislocation

“…3a-c) agree with our predictions. This stands as one of few direct experimental verifications of elasticity solutions for individual dislocations [40][41][42] . In the o IĪ0 profile (Fig.…”

Experimental examination of strain field within GP zone in an Al–Zn–Mg–Cu alloy

“…So far, the GPA has successfully been applied to a wide variety of systems, such as quantum dots [5], nanowires [6], Si/Ge heterostructures [7] and low-angle grain boundaries [8]. Furthermore, the GPA technology has also been applied to quantitative measurements of the displacement field of the edge dislocation in metal aluminum and gold [1,9]. And it has been confirmed that the GPA technique is a suitable and reasonable method for quantitative measuring of the displacements and the strain fields in the nano-scale regions.…”

“…So, quantitative experimental study about the displacements and the strain fields of the lattice planes within the GP zone in the Al alloys has been seldom reported elsewhere. Recently, highresolution transmission electron microscopy (HRTEM) has become a powerful tool for mapping the displacements and the strain fields at the nano-scale level because of the development of quantitative image analysis methods [1,2], and especially, the geometric phase analysis (GPA) technique, whose accuracy has demonstrated that it could be measured to 0.003 nm, is one of such techniques [3,4]. So far, the GPA has successfully been applied to a wide variety of systems, such as quantum dots [5], nanowires [6], Si/Ge heterostructures [7] and low-angle grain boundaries [8].…”

Geometric phase analysis based on the windowed Fourier transform for the deformation field measurement

“…Recently, combining with the advanced fabrication techniques of high-frequency gratings [8][9][10], GPA has been widely used in the deformation measurement at micro-and nano-scale [11][12][13][14][15][16][17]. The traditional GPA method, referred to as FT-GPA in this paper, is based on the relationship between the displacement and the phase difference.…”