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Search for "deformation mechanisms" in Full Text gives 12 result(s) in Beilstein Journal of Nanotechnology.
Graphynes: an alternative lightweight solution for shock protection
Beilstein J. Nanotechnol. 2019, 10, 1588–1595, doi:10.3762/bjnano.10.154
- Laboratory of Explosion Science and Technology, Beijing Institute of Technology, Beijing 100081, China 10.3762/bjnano.10.154 Abstract The excellent mechanical properties of graphyne (GY) have made it an appealing candidate in the field of impact protection. We assessed the deformation mechanisms of
- the different energy absorption capability, the GYs exhibit different deformation mechanisms. For β-GY, the out-of-plane deformation is about 30.78 Å before crack initiation. Instead of the hexagonal deformation pattern observed in α-GY (left panel in Figure 3a), β-GY shows a clearly round kinetic
Pull-off and friction forces of micropatterned elastomers on soft substrates: the effects of pattern length scale and stiffness
Beilstein J. Nanotechnol. 2019, 10, 79–94, doi:10.3762/bjnano.10.8
- of deformation mechanisms of the substrate in the pull-off and sliding of our adhesives could be further investigated by varying the pull-off or sliding speed, since the strain rates of both substrate and adhesives are time dependent. Conclusion We used a facile, out-of-the-cleanroom method to
Hydrogen-induced plasticity in nanoporous palladium
Beilstein J. Nanotechnol. 2018, 9, 3013–3024, doi:10.3762/bjnano.9.280
- studies up to this point. This work focuses on the strain response of npPd upon hydrogenation and aims to shed light on the active deformation mechanisms. Results Electrochemical characterisation A typical strain response of npPd was measured using an in situ dilatometer setup during a cyclic voltammogram
- introduced above, accounting for the ascending part of the sawtooth, could be a possible explanation for the serrations in the strain curve. Summary In this work we investigated the deformation mechanisms in npPd by using an in situ dilatometric technique in an electrochemical environment. Different hydrogen
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
- both the scientific understanding and practical design of nanostructured materials. Previously, triple junctions have been reported to play a critical role in other deformation mechanisms in nanostructured materials, like grain rotation [16] and grain boundary sliding [17]. Additionally, earlier
The self-similarity theory of high pressure torsion
Beilstein J. Nanotechnol. 2016, 7, 1267–1277, doi:10.3762/bjnano.7.117
- -similarity. Outside these ranges, the plasticity problem still has to be solved for each value of β. The results obtained have important practical implications for the proper design and analysis of HPT experiments. Keywords: deformation mechanisms; high pressure torsion; nanocrystalline metals; self
Advanced atomic force microscopy techniques III
Beilstein J. Nanotechnol. 2016, 7, 1052–1054, doi:10.3762/bjnano.7.98
- indentation in UHV to quantitatively determine the hardness and deformation mechanisms by Arnaud Caron and Roland Bennewitz [22]. Santiago Solares and Enrique A. López-Guerra presented different approaches to model such viscoelastic properties within AFM simulations [23]. Sliding contact properties like
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
- rupture of the film. In conclusion, conventional deformation mechanisms are still active in nanocrystalline metals but with different weighting as compared with conventional materials with coarser grains. Keywords: ACOM-STEM; deformation mechanisms; in situ straining; nanocrystalline metals; orientation
- ]. Modified or even unexpected deformation mechanisms are ascribed to the increasing influence of grain boundaries (GBs) on mechanical properties [3][4][6][7][8][9][10][11][12][13][14][15][16][17][18][19][20]. GB-mediated deformation mechanisms, such as GB sliding and migration, grain growth and rotation [21
- dislocation-driven grain rotation can still be attributed to dislocation formation, propagation and adsorption [13][22]. The understanding of the active deformation mechanisms is essential to support the application of NC metals, for example, in microelectrical mechanical systems (MEMS) [23], hydrogen storage
Lower nanometer-scale size limit for the deformation of a metallic glass by shear transformations revealed by quantitative AFM indentation
Beilstein J. Nanotechnol. 2015, 6, 1721–1732, doi:10.3762/bjnano.6.176
- Abstract We combine non-contact atomic force microscopy (AFM) imaging and AFM indentation in ultra-high vacuum to quantitatively and reproducibly determine the hardness and deformation mechanisms of Pt(111) and a Pt57.5Cu14.7Ni5.3P22.5 metallic glass with unprecedented spatial resolution. Our results on
- plastic deformation mechanisms of crystalline Pt(111) are consistent with the discrete mechanisms established for larger scales: Plasticity is mediated by dislocation gliding and no rate dependence is observed. For the metallic glass we have discovered that plastic deformation at the nanometer scale is
- shape throughout our experimental study allows us to compare the nanometer-scale plastic flow of Pt(111) and Pt57.5Cu14.7Ni5.3P22.5 metallic glass. Our AFM indentation results reveal fundamentally different deformation mechanisms. For the crystalline Pt(111) the plastic deformation is accommodated over
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
- allowing for lateral contraction. The atomic scale deformation mechanisms were analyzed by visualizing the local atomic shear strain [23], calculated with the OVITO analysis and visualization software [24]. A quantitative interpretation of strain localization has been realized by using the strain
- plastic behavior of NGs was investigated by using two alloy compositions: a Zr-rich NG (Cu36Zr64) and the Cu-rich NG (Cu64Zr36) studied also in [12]. Both types of NGs have an average grain size of 10 nm. The operating deformation mechanisms in these NGs and the corresponding BMGs (≈106 atoms) was
- previous studies [12] it is worth to investigate how thermal annealing affects the structure of glass–glass interfaces and the plastic deformation mechanisms in the Zr-rich NG in comparison to the Cu-rich NG. The NGs were annealed at 800 K (≈0.85 Tg of the bulk glass) for 2 ns. After annealing, the NGs
Scale effects of nanomechanical properties and deformation behavior of Au nanoparticle and thin film using depth sensing nanoindentation
Beilstein J. Nanotechnol. 2014, 5, 822–836, doi:10.3762/bjnano.5.94
- tribological applications on the macro- to nanoscale and applications requiring controlled manipulation and targeting [25]. In these environments the nanoparticles can be deformed locally or the entire nanoparticle can be compressed. Knowledge of the mechanical properties and deformation mechanisms involved
Deformation-induced grain growth and twinning in nanocrystalline palladium thin films
Beilstein J. Nanotechnol. 2013, 4, 554–566, doi:10.3762/bjnano.4.64
- ductility and suffer from rapid strain localization [2]. Understanding the underlying deformation mechanisms operating in these structures is important, for example to guarantee the reliability of nc materials in next-generation micro- and nano-scale devices. In nc metals, with grain sizes well below 100 nm
- , the conventional deformation mechanisms based on dislocation motion and multiplication, which govern deformation in coarse-grained metals, are increasingly limited by grain boundaries with decreasing grain size. It is believed that their low ductility is associated with this [3]. Although nc metals
- are under investigation for a number of years, there still is an ongoing debate on the deformation mechanisms active in these materials. Discussed are grain boundary sliding, grain rotation, emission and annihilation of dislocations at grain boundaries, intragranular dislocation glide resulting in
Plasticity of nanocrystalline alloys with chemical order: on the strength and ductility of nanocrystalline Ni–Fe
Beilstein J. Nanotechnol. 2013, 4, 542–553, doi:10.3762/bjnano.4.63
- distribution and the degree of order on the interplay of intergranular and intragranular deformation mechanisms. Methodology We employ a hybrid simulation method [17] that has been used for describing miscible random alloys [18] as well as segregating systems [19]. The atomic interaction is modeled by an
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