Comparing small scale plasticity of copper-chromium nanolayered and alloyed thin films at elevated temperatures

Raghavan, R.; Harzer, Tristan Philipp; Chawla, Vikas; Djaziri, Soundès; Phillipi, B.; Wehrs, Juri; Wheeler, Jeffrey M.; Michler, Johann; Dehm, Gerhard

doi:10.1016/j.actamat.2015.04.008

Cited by 27 publications

(8 citation statements)

References 57 publications

(63 reference statements)

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“…There is a larger number of studies focused on the correlation between structure and mechanical properties of cubic systems (bcc/fcc [16,24,37,38], fcc/fcc [23,[39][40][41] and bcc/bcc [23,42]). Only recently, cubic/hcp systems started to attract some attention among the scientific community.…”

mentioning

confidence: 99%

Combined size and texture-dependent deformation and strengthening mechanisms in Zr/Nb nano-multilayers

Callisti

Polcar

2017

Acta Materialia

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A combination of transmission electron microscopy analyses and nanomechanical measurements was performed in this study to reveal deformation and strengthening mechanisms occurring in sputtered Zr/Nb nanoscale metallic multilayers (NMMs) with a periodicity (L) in the range 6 -167 nm. Electron diffraction analyses revealed a change in the crystallographic orientation of α-Zr when L ≤ 27 nm, while Nb structure retained the same orientations regardless of L. For L > 60 nm, the strengthening mechanism is well described by the Hall-Petch model, while for 27 < L < 60 nm the refined CLS model comes into picture. A decrease in strength is found for L < 27 nm, which could not be simply explained by considering only misfit and Koehler stresses. For L ≤ 27 nm, plastic strain measured across compressed NMMs revealed a change in the plastic behaviour of α-Zr, which experienced a hard-to-soft transition. At these length scales, the combination of two structural factors were found to affect the strength. These relate to the formation of weaker interfaces which extend the effective distance between strong barriers against dislocation transmission, thus producing a softening effect. 1The second effect relates to the crystallographic orientation change exhibited by α-Zr for L < 27 nm with a consequent change of the dominant slip system. The actual strength at these smaller length scales was effectively quantified by taking these structural aspects into account in the interface barrier strength model.

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confidence: 99%

Combined size and texture-dependent deformation and strengthening mechanisms in Zr/Nb nano-multilayers

Callisti

Polcar

2017

Acta Materialia

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“…On the other hand, viscous flow is not the only deformation mechanism for materials under high pressure. A deformation via plastic yield is widely reported in many deformation experiments on polymers, alloys, and metallic glass . The atomistic origin for the plastic yield criterion for metallic glass under pressure is discussed by Schuh & Lund, which generally supports the plastic yield behavior in amorphous materials.…”

Section: Introductionmentioning

confidence: 81%

“…To account for the temperature influence on the yield stress, Raghavan et al used the Arrhenius model,…”

Section: Discussionmentioning

confidence: 99%

Plastic yielding of glass in high‐pressure torsion apparatus

Ding

Kerber

Kunisch

et al. 2018

Int J of Appl Glass Sci

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Hardness measurements performed at room temperature have demonstrated that glass can flow under elevated pressure, whereas the effect of high pressure on glass rheology remains poorly quantitated. Here, we applied a high‐pressure torsion apparatus to deform SCHOTT SF6® glass and attempted to quantitate the effect of pressure and temperature on the shear deformation of glass subjected to pressures from 0.3 to 7 GPa and temperatures from 25 to 496°C. Results show that the plastic yield deformation was occurring during the HPT experiments on the SF6 glass at elevated temperature from 350 to 496°C. The yield stress of SF6 glass decreases with increasing temperature and decreasing pressure. An extended Arrhenius model with one set of parameters, namely infinite yield stress Y0 = 0.17 ± 0.1 GPa, activation energy Ea = 4.8 ± 0.5 kJ/mol and activation volume Va = 1.4 ± 0.2 cm3/mol, can explain the experimental results well.

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“…Immiscible alloy is characterized by the miscibility gap in the phase diagram, which generally experiences liquid-liquid phase separation (LLPS) in this zone [1], as shown in Figure 1. Many of them have a wide range of applications, such as superconducting, electrical contact, and self-lubricating materials [2][3][4][5][6][7]. In particular, immiscible alloy with a regular core-shell structure has huge application potential in electronic packaging solders [8,9].…”

Section: Introductionmentioning

confidence: 99%

Solidification of Immiscible Alloys under High Magnetic Field: A Review

Chen

Wang

et al. 2021

Metals

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Immiscible alloy is a kind of functional metal material with broad application prospects in industry and electronic fields, which has aroused extensive attention in recent decades. In the solidification process of metallic material processing, various attractive phenomena can be realized by applying a high magnetic field (HMF), including the nucleation and growth of alloys and microstructure evolution, etc. The selectivity provided by Lorentz force, thermoelectric magnetic force, and magnetic force or a combination of magnetic field effects can effectively control the solidification process of the melt. Recent advances in the understanding of the development of immiscible alloys in the solidification microstructure induced by HMF are reviewed. In this review, the immiscible alloy systems are introduced and inspected, with the main focus on the relationship between the migration behavior of the phase and evolution of the solidification microstructure under HMF. Special attention is paid to the mechanism of microstructure evolution caused by the magnetic field and its influence on performance. The ability of HMF to overcome microstructural heterogeneity in the solidification process provides freedom to design and modify new functional immiscible materials with desired physical properties. This review aims to offer an overview of the latest progress in HMF processing of immiscible alloys.

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Comparing small scale plasticity of copper-chromium nanolayered and alloyed thin films at elevated temperatures

Cited by 27 publications

References 57 publications

Combined size and texture-dependent deformation and strengthening mechanisms in Zr/Nb nano-multilayers

Combined size and texture-dependent deformation and strengthening mechanisms in Zr/Nb nano-multilayers

Plastic yielding of glass in high‐pressure torsion apparatus

Solidification of Immiscible Alloys under High Magnetic Field: A Review

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