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Search for "deformation mechanism" in Full Text gives 12 result(s) in Beilstein Journal of Nanotechnology.
Effects of cutting tool geometry on material removal of a gradient nanograined CoCrNi medium entropy alloy
Beilstein J. Nanotechnol. 2024, 15, 925–940, doi:10.3762/bjnano.15.76
- chip thickness has the lowest average resultant force, consistent with the results of the surface morphology analysis in Figure 2. The subsurface quality of the workpiece significantly affects accuracy and durability in the machining process. To investigate the deformation mechanism of the subsurface
- results show that the deformation mechanism of the chip from a cutting tool with a small cutting-edge radius is preferably shear deformation, and the shear strain is mainly distributed at the contact between the tool and substrate. As the cutting-edge radius increases, the subsurface damage range becomes
- structure evolution results show that the mixed phase of FCC and HCP is maintained in the chip after cutting. The internal crystal structure undergoes a phase transformation from FCC to HCP during cutting. Stacking faults, twins, and grain boundary slips inside the grains affect the plastic deformation
Effects of temperature and repeat layer spacing on mechanical properties of graphene/polycrystalline copper nanolaminated composites under shear loading
Beilstein J. Nanotechnol. 2021, 12, 863–877, doi:10.3762/bjnano.12.65
- boundaries, which leads to the diffusion of atoms and the gliding of the dislocations, as shown in Figure 16a1–a4. Besides, the deformation mechanism also depends on the grain size. In the case of large grains (D = 9.43 nm), the propagation of dislocations and stacking faults mainly occurs inside the grains
Graphynes: an alternative lightweight solution for shock protection
Beilstein J. Nanotechnol. 2019, 10, 1588–1595, doi:10.3762/bjnano.10.154
- morphology will alter the deformation mechanism of GY under impact. Considering the different elastic stress wave propagation velocities, it is crucial to examine how the GYs will performance under different impact velocity amplitudes. For this purpose, we consider the deformation of an α-GY nanosheet under
Nanoscale spatial mapping of mechanical properties through dynamic atomic force microscopy
Beilstein J. Nanotechnol. 2019, 10, 1332–1347, doi:10.3762/bjnano.10.132
- understand the results contained within [24]: the elastic modulus of a step edge is lower than the surrounding terrace. The finding is also consistent with the enhanced deformation mechanism at step edges used to interpret enhanced friction at graphene step edges in [25] and gives the first quantifiable
Hydrogen-induced plasticity in nanoporous palladium
Beilstein J. Nanotechnol. 2018, 9, 3013–3024, doi:10.3762/bjnano.9.280
- are elucidated, taking into account characteristics of structure and deformation mechanism. Keywords: electrochemistry; hydride formation; in situ dilatometry; internal-stress plasticity; nanoporous palladium; Introduction Material properties on the nanoscale can differ substantially from their bulk
- above-mentioned tunable properties in nanoporous metals. The deformation mechanism in such structures has been discussed in detail. Since nanoporous materials exhibit high surface-to-volume ratios, moving dislocations may escape crystals via the surface, which may lead to a scenario of dislocation
- starvation [27]. This dislocation starvation also implies that the work hardening mechanism, which is based on dislocation interactions, is not active. However, current literature suggests that the active deformation mechanism in npAu is dislocation slip [28] and that dislocation starvation is not effective
Molecular dynamics simulations of nanoindentation and scratch in Cu grain boundaries
Beilstein J. Nanotechnol. 2017, 8, 2283–2295, doi:10.3762/bjnano.8.228
- a 20° angle is stronger as compared to other structures. Conclusion The mechanical and grain boundary characteristics of Cu films under nanoindentation and scratch conditions were studied using MD simulations. The conclusions of the analysis and the deformation mechanism of the grain boundary are as
A new approach to grain boundary engineering for nanocrystalline materials
Beilstein J. Nanotechnol. 2016, 7, 1829–1849, doi:10.3762/bjnano.7.176
- in nanocrystalline and submicrometer-grained materials. The Hall–Petch relationship between the hardness and the average grain size fails when the average grain size is much smaller than 30 nm, as shown in Figure 1b. It has been suggested that the dominant deformation mechanism in nanocrystalline
Effect of triple junctions on deformation twinning in a nanostructured Cu–Zn alloy: A statistical study using transmission Kikuchi diffraction
Beilstein J. Nanotechnol. 2016, 7, 1501–1506, doi:10.3762/bjnano.7.143
- –triple junction connections. This relatively high percentage of twin–triple junction connections also implies that triple junctions could be playing a significant role in the nucleation of deformation twins. This is the first time such statistical data is reported. A well-known deformation mechanism in
In situ observation of deformation processes in nanocrystalline face-centered cubic metals
Beilstein J. Nanotechnol. 2016, 7, 572–580, doi:10.3762/bjnano.7.50
- resolution in comparison to ACOM-TEM with far better grain statistics. Both good statistics and temporal resolution are necessary to reveal small differences in the deformation mechanism with the alloy content. With ACOM-TEM, the multiple concurrent mechanisms in all alloy systems are apparent. The twin
Possibilities and limitations of advanced transmission electron microscopy for carbon-based nanomaterials
Beilstein J. Nanotechnol. 2015, 6, 1541–1557, doi:10.3762/bjnano.6.158
- reported that the deformation of Au-contacted CNT walls is more prominent compared to Pd-contacted CNT walls (not shwon), which could be associated to higher wettability of Pd over Au nanoparticles on one hand. On the other hand, a deformation mechanism through elastic strain relaxation is also proposed
Influence of grain size and composition, topology and excess free volume on the deformation behavior of Cu–Zr nanoglasses
Beilstein J. Nanotechnol. 2015, 6, 537–545, doi:10.3762/bjnano.6.56
- multiple shear bands, in contrast to the BMG which exhibits localized deformation in one dominant shear band. In order to study how the deformation mechanism of NGs changes by varying the glassy grain size the local atomic shear strain was calculated for each of these NGs and BMG (Figure 2). Up to a strain
- in the soft interfaces is higher than 70%. Basically the NG structure resemble the one of a soft BMG. Similar, a transition in the deformation mechanism of a BMG form a localized deformation in shear bands to a homogeneous plastic flow was observed when increasing the casting cooling rate [26]. Here
Deformation-induced grain growth and twinning in nanocrystalline palladium thin films
Beilstein J. Nanotechnol. 2013, 4, 554–566, doi:10.3762/bjnano.4.64
- , SXRD) experiments. Keywords: ACOM-TEM; deformation mechanism; nanostructured metals; tensile testing; XRD; Introduction Nanocrystalline (nc) metals and alloys exhibit different mechanical behavior compared to their coarse-grained counterparts [1]. They show extraordinary strength but often lack
- contain about 1–2 twins, with the absolute value depending on minute difference in the sputtering conditions. Grain growth as a result of stress coupled grain boundary motion was identified as one of the deformation mechanism. The grain growth observed within the plane of the film was about a factor of 2
- higher compared to the grain growth along the thickness of the film. Partial dislocation activity leading to twinning/detwinning was identified as a second deformation mechanism. Samples with a high density of growth twins exhibit detwinning with increasing strain, whereas samples with a low density of
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