Jul 26, 2021 · The generalized stacking fault energy (GSFE) is a material property that can provide invaluable insights into describing nanoscale plasticity phenomena in crystalline materials. Lattice strains have been suggested to influence such phenomena.
Stacking Faults. Stacking faults are introduced in a crystal by cutting a perfect crystal block along a plane and shifting the upper part with respect to the lower part by a vector f, defining the generalized stacking fault energy surface. Local energy minima on this surface are called stable intrinsic stacking faults.
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Metastable austenitic steels react to plastic deformation with a thermally and/or mechanically induced martensitic phase transformation. The martensitic transformation to α’-martensite can take place directly or indirectly via the intermediate stage of ε-martensite from the single-phase austenite. This effect is influenced by the stacking fault energy (SFE) of austenitic steels. An SFE <
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Stacking faults are in a higher energy state which is quantified by the formation enthalpy per unit area called the stacking-fault energy. Stacking faults can arise during crystal growth or from plastic deformation. In addition, dislocations in low stacking-fault energy materials typically dissociate into an extended dislocation, which is a
May 15, 2015 · The stacking fault energy (SFE) plays a critical role in the deformation properties of face-centered cubic (FCC) metals and alloys. The SFE influences such important phenomena as the formation of partial dislocations, the ability of a dislocation to cross slip, and the formation of twin boundaries, all of which having an effect on yield behavior [1, 2].
Feb 11, 2021 · Alternating current allows the plastic to reach high enough initial temperatures to form graphene and facilitates rapid cooling in between pulses. The rapid cooling step, which is unique to alternating current, prevents the newly-formed graphene from stacking into layers. However, this alternating current generates an initial, low-purity graphene.
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The stacking fault energy, SFE in short, is an important parameter determining the dissociation of a dislocation, which has a significant influence on the plastic deformation behavior. Their values have been determined mostly by transmission electron microscopy from the width of extended dislocations and other configurations of dislocations.
predict plastic deformation and recrystallization [18,19]. Determining stacking fault energy, γ, and ideal shear strength, τ IS, from experiments is not a trivial task. Weak-beam transmission electron microscopy (TEM) images can be used to calculate γ values , and τ IS values may be determined from well-controlled nanoindentation tests .
Mar 09, 2021 · Extensive research has shown that the dislocation-dominated plasticity in face-centered cubic (FCC) metals is strongly influenced by the stacking fault energy [4,5,6,7,8]. For example, at high stacking fault energy (i.e., above 45 mJ. m −2) such as in Al and Ni [9, 10], the plasticity is dominated by full dislocation slip .