The aluminum''s high stacking fault energy (SFE) enhances the ability of cross-slip assisted dislocation motion, resulting in the formation of subgrains or
Read MoreTailoring stacking fault energy (SFE) is an effective way for enhancing mechanical properties of certain high entropy alloys (HEAs) such as the prototype Cantor
Read MoreFCC and HCP metals with low stacking fault energy (SFE) or nanoscale grain size tend to form SFs during plastic deformation. However, it is difficult to
Read MoreIn this study, the total stacking fault energy (SFE) of GH3536 superalloy was divided into three fundamental terms (chemical, magnetic and strain terms) for investigating the dependence of temperature via ab initio calculations.The present results imply that the incremental trend of SFE value is responsible for the increasing
Read MoreUnderstanding the relationship between the stacking-fault energy (SFE), deformation mechanisms, and strain-hardening behavior is important for alloying
Read MoreAs a responsible criteria for the deformation schemes among slip, twinning, and phase transformation, stacking fault energy (SFE) is necessary to be determined. Note that the SFE was analyzed by the relationship between the mean-square strain ( ε 2 50 111) and stacking fault probability (P sf) in Eq. (1). Fig. 7 (a) shows the P
Read MoreDependence of tensile deformation behavior of TWIP steels on stacking fault energy, temperature and strain rate Acta Mater., 58 ( 2010 ), pp. 5129 - 5141, 10.1016/j.actamat.2010.05.049 View PDF View article View in Scopus Google Scholar
Read MoreIn the present model, both of the dislocation evolution terms (Eqs. (5) and (6)) and the key coefficient K 0 in Eq. (2) are directly related to material parameters (such as SFE, self-diffusion activation energy, etc.) and deformation parameters (temperature and strain). Thus, the model is truly predictive, as these material parameters and
Read MoreThe temperature takes a minor effect on stacking fault energy in high-purity Ti, which stays around 310 mJ/m 2. However, it takes a noticeable effect on Ti-Al
Read MoreThe intrinsic stacking fault energy shows considerable temperature dependence, thus the deformation processes can be controlled by changing the
Read MoreThe stacking fault energy (SFE) plays a key role in the plastic deformation mechanism of metals and alloys. The mechanical properties of Cu– x Ge alloys ( x =0–9.0 at%) that were prepared by forging at liquid nitrogen temperature could be significantly enhanced via manipulation of the SFE.
Read MoreNew values of the stacking-fault energy of Ag and Al are used as calibration points for the method of determination of Dillamore et al. (1964) and their values of γAu, γPt, γTh, γPd, γNi and
Read MoreOne crucial parameter influencing the deformation behaviour and mechanical properties of materials is the stacking fault energy (SFE). The SFE plays a pivotal role in determining the likelihood of cross slip and affects the propensity of forming deformation twins and undergoing strain-induced phase transformations.
Read MoreWe find that a network of stacking faults is formed by uniformly extended dislocations at ambient temperatures with low stacking-fault energy, whereas at lower temperatures, uneven dissociation of
Read More1. Introduction. The stacking-fault energy (SFE) is a composition and temperature-dependent characteristic of crystalline materials and plays an important role for the austenitic steel deformation [1], [2]. The response to plastic deformation can in the case of austenitic stainless steels give rise to the microstructural changes: slip,
Read MoreThe effect of stacking fault energy on the plastic deformation of polycrystalline Ni-Co alloys. Acta Metall., 21 (1973), pp. 1343-1352. View PDF View article View in Scopus Google Scholar Relationship between stacking-fault energy and x-ray measurements of stacking-fault probability and microstrain. J. Appl. Phys., 45 (1974),
Read MoreTo determine right thermodynamic parameters in calculating the stacking fault energy (SFE) in Fe–Mn–Si–C high manganese steels, deformation mechanisms of several Fe–Mn–Si–C high
Read MoreAlternatively, segregation of Si atoms (see Fig. 6h) near the hetero-phase interface could have reduced the local stacking fault energy (SFE), leading to an enhancement of the twinning ability of
Read MoreThe SFE is calculated as the excess free energy per unit area related to an intrinsic stacking fault forming in a fault-free fcc lattice via ab initio calculations [41].The geometry optimization was performed to determine a 0 for fcc structures by using SQS supercells. The SQS method was used to mimic the random distribution of solute atoms
Read MoreStacking Fault Energy. The stacking-fault energy (SFE) determines how easy it is for dislocations to cross-slip, that is, to move from one glide plane to another glide plane, which also contains the dislocation''s Burgers vector. to conclude that there was a parabolic relationship between the stress required to initiate deformation twinning
Read MoreSignificance of stacking fault energy in bulk nanostructured materials: Insights from Cu and its binary alloys as model systems it is necessary to understand the competitive relationship between dislocation slip and deformation twinning. 2.1. a few stacking faults and deformation twins are occasionally observed in several grains
Read MoreThe stacking fault energy (SFE) is a physical parameter governing the deformation mechanisms of FCC metals and alloys, having direct influence on their mechanical properties, and describes the tendency to introduce local planar defects known as stacking-faults (SF) by mechanical deformation [1, 2].The materials where SFE is a
Read MoreThe stacking fault energy plays an important role in the transition of deformation microstructure. This energy is strongly dependent on the concentration of alloying elements and the temperature under which the alloy is exposed. Extensive literature review has been carried out and investigated that there are inconsistencies in findings on
Read MoreAccording to the results, plastic deformation through shear bands is the dominant mechanism in materials with lower stacking fault energy (CuCrZr) treated under cryogenic conditions. View Show
Read MoreHigh stacking fault energy leads to increased perfect dislocation density and less effective hetero-deformation. • Grain boundary relaxation under tensile loading and its strain rate effect are analyzed. • A deformation mechanism map is illustrated from grain size and stacking fault energy variation.
Read MoreQuantum mechanical first principles calculations were used to obtain the γ-surface between 300 − 800 K. The main parameters of the γ-surfaces such as the unstable stacking fault energy, intrinsic stacking fault energy and the unstable twinning fault energy are shown on Fig. 1 and summarised in Table 3.. Download : Download high-res
Read MoreDuring the plastic deformation process of austenitic steel, with the increase of stacking fault energy (SFE), the microscopic deformation structures are deformed martensite [15], deformed twins
Read MoreThe stacking fault energy plays an important role in the transition of deformation microstructure. This energy is strongly dependent on the concentration of alloying elements and the temperature under
Read MoreThis is a new approach in the microstructure-stacking fault energy relationship studies. Eleven alloys were obtained, varying the dilution levels from 7.6 to 41.0 pct, producing a manganese composition from 12 to 20 wt pct. S.J. Kim, Correlation between stacking fault energy and deformation microstructure in high-interstitial
Read MoreAdding Al could alter the energy locally in γ-surface, but does not change the minimum energy path and position of stable stacking fault. We further investigate the temperature effect on stacking
Read MoreThe stacking fault energy γ of an alloy has been reported to significantly affect the grain size d and twin nucleation size r c during grain refinement. However, ternary relation among γ, d and r c has not been investigated comprehensively. Here we prepared nanocrystalline (NC) and ultrafine-grained (UFG) 99.99 wt% Cu, Cu-0.86 wt% Al and Cu
Read MoreTemperature effect on stacking fault energy and deformation mechanisms in titanium and titanium-aluminium alloy Sci. Rep., 10 ( 1 ) ( 2020 ), pp. 1 - 6, 10.1038/s41598-020-60013-6 View in Scopus Google Scholar
Read MoreHowever, the effect of Al on reducing stacking-fault energy (SFE) as decreasing temperature is significant. Consequently, the lower SFE in Ti-5at%Al results in ordinary planar dislocation slip
Read MoreThe γ surface for pure Ni is studied first. In the GSFE curve for {1 ¯ 1 ¯ 1}<112> shear deformation, the first energy maximum determines the unstable stacking fault energy (γ USF), which represents the energy barrier for the generation of a stacking fault occurs around b p [112] / 2, where the Burgers vector is b p [112] = (1/6)[112]a 0
Read MoreStacking fault energy (SFE) is related to activating complex high strength and ductility mechanisms such as transformation-induced plasticity and twinning-induced
Read MoreHowever, the intricate relationship between nanoprecipitate characteristics and their interactions with multiple deformation mechanisms remains an open question. Li et al. ( Li et al., 2023 ) found that transformable Cu precipitates facilitated planar slip, microband formation, and strain accommodation at twin boundaries, delaying martensitic
Read MoreThe variation in stacking fault energy (SFE) with the change in temperature has been evaluated experimentally for Fe40Mn40Co10Cr10 high entropy alloy. The distance between
Read MoreUnderstanding the relationship between the stacking-fault energy (SFE), deformation mechanisms, and strain-hardening behavior is important for alloying and design of high-Mn austenitic transformation-and twinning-induced plasticity (TRIP/TWIP) steels.
Read MoreHere we report that a reduction in the stacking fault energy permits the emission of partial dislocations from grain boundaries in ultrafine-grained materials with
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