Dislocation Structures in Plastically Deformed, Disordered Ni3Fe

Karnthaler, H. P.; Schügerl, B.

doi:10.1016/b978-1-4832-8412-5.50042-4

Cited by 17 publications

(4 citation statements)

References 7 publications

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“…The lattice friction stress increased sharply in the carbon-doped HEAs, along with the reduction of SFE; producing the transition from wavy slip in the undoped HEA to planar slip in the carbon-doped HEA. With a reduction of SFE, cross slip is inhibited so that the Shockley partial dislocations are more separated on the slip plane [49], although planar slip has been observed in some solid solutions with high SFEs [50,51]. Carbon in f.c.c.…”

Section: Effect Of Carbon On Yield Strengthmentioning

confidence: 99%

The effect of interstitial carbon on the mechanical properties and dislocation substructure evolution in Fe40.4Ni11.3Mn34.8Al7.5Cr6 high entropy alloys

et al. 2016

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A systematic study of the effects of up to 1.1 at. % carbon on the mechanical properties and evolution of the dislocation substructure in a series of a high entropy alloys (HEA) based on Fe 40.4 Ni 11.3 Mn 34.8 Al 7.5 Cr 6 is presented. Transmission electron microscopy (TEM), synchrotron X-ray diffraction (XRD) and atom probe tomography (APT) were used to show that all the alloys are single-phase f.c.c. random solid solutions. The lattice constant, determined from synchrotron XRD measurements, increases linearly with increasing carbon concentration, which leads to a linear relationship between the yield strength and the carbon concentration. The dislocation substructures, as determined by a TEM, show a transition from wavy slip to planar slip and, at higher strains, and from cellforming structure (dislocations cells, cell blocks and dense dislocation walls) to non-cell forming structure (Taylor lattice, microbands and domain boundaries) with the addition of carbon, features related to the increase in lattice friction stress. The stacking fault energy (measured via weak-beam imaging of the separation of dislocation partials) decreases with increasing carbon content, which also contributes to the transition from wavy slip to planar slip. The formation of non-cell forming structure induced by carbon 3 leads to a high degree of strain hardening and a substantial increase in the ultimate tensile strength. The consequent postponement of necking due to the high strain hardening, along with the plasticity accommodation arising from the formation of microbands and domain boundaries, result in an increase of ductility due to the carbon addition.

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Section: Effect Of Carbon On Yield Strengthmentioning

confidence: 99%

The effect of interstitial carbon on the mechanical properties and dislocation substructure evolution in Fe40.4Ni11.3Mn34.8Al7.5Cr6 high entropy alloys

et al. 2016

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“…Therefore, an open question is raised: how can the work-hardening capacity of FCC alloys with high SFEs be improved? Actually, research findings reported by some investigators [20][21][22] have brought us a favorable inspiration. In these studies, it was pointed out that the pronounced planar slip was also observed in Ni 3 Fe and Cu-Mn alloys despite the fact that these alloys have quite high SFEs.…”

mentioning

confidence: 94%

Impact of Short-Range Clustering on the Multistage Work-Hardening Behavior in Cu–Ni Alloys

Han

Jin-xian

Guan

et al. 2019

Metals

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The work-hardening behavior of Cu–Ni alloys with high stacking-fault energies (SFEs) is experimentally investigated under uniaxial compression. It is found that, with the increase of Ni content (or short-range clustering, SRC), the flow stress of Cu–Ni alloys is significantly increased, which is mainly attributed to an enhanced contribution of work-hardening. An unexpected multistage (including Stages A, B, and C) work-hardening process was found in this alloy, and such a work-hardening behavior is essentially related to the existence of SRC structures in alloys. Specifically, during deformation in Stage B (within the strain range of 0.04–0.07), the forming tendency to planar-slip dislocation structures becomes enhanced with an increase of SRC content (namely, increase of Ni content), leading to the occurrence of work-hardening rate recovery in the Cu–20at.% Ni alloy. In short, increasing SRC in the Cu–Ni alloy can trigger an unexpected multistage work-hardening process, and thus improve its work-hardening capacity.

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“…So since 50 th -60 th of the XX century the researchers have actively studied the dislocation structure of the deformed materials using the transmission electron microscopy method. (TEM) [1][2][3][4][5][6][7][8]. Much attention was paid to fcc monocrystals, first of all to Cu, Al and Ni.…”

Section: Introductionmentioning

confidence: 99%

“…The fcc solid solution monocrystals were also studied though the range of such investigated materials has not been large yet. In this connection one should note the electron microscopy investigations of the monocrystals of Cu-Al, Ni-Fe solid solutions [5][6][7][8].…”

Section: Introductionmentioning

confidence: 99%

Influence of Crystal Orientation on Ni<sub>3</sub>Fe Dislocation Structure Evolution

Teplyakova

Kunitsyna

Конева

2014

AMR

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The dislocation structure and mechanical properties of Ni3Fe single crystals with the short range order were investigated. The laws of the dislocation structure evolution of single crystals at different deformation axis orientations were analysed. Correlation of the dislocation structure evolution with the deformation stages for the single crystals with the deformation axis orientations [001], [11], [011] and [1.8.12] was established. The role of the slipping plane numbers in the substructure evolution was revealed.

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Dislocation Structures in Plastically Deformed, Disordered Ni3Fe

Cited by 17 publications

References 7 publications

The effect of interstitial carbon on the mechanical properties and dislocation substructure evolution in Fe40.4Ni11.3Mn34.8Al7.5Cr6 high entropy alloys

The effect of interstitial carbon on the mechanical properties and dislocation substructure evolution in Fe40.4Ni11.3Mn34.8Al7.5Cr6 high entropy alloys

Impact of Short-Range Clustering on the Multistage Work-Hardening Behavior in Cu–Ni Alloys

Influence of Crystal Orientation on Ni<sub>3</sub>Fe Dislocation Structure Evolution

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