Detection of grain-boundary resistance to slip transfer using nanoindentation

Soer, W.A.; Hosson, J.Th.M. De

doi:10.1016/j.matlet.2005.03.075

Cited by 92 publications

(66 citation statements)

References 12 publications

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“…Moreover, GB pop-ins were not observed in interstitial-free steel or in fcc copper, but were observed in commercial steel with interstitials. Soer et al 62,67 studied grain boundaries in Fe-14%Si and Mo bicrystals and reported consistent GB pop-ins in Fe-14%Si, but not in Mo. Aifantis et al 65 also reported GB pop-ins in Fe-2.2%Si bicrystals.…”

Section: Grain/phase Boundaries In Metalsmentioning

confidence: 98%

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Mechanical Characterization of Mesoscale Interfaces Using Indentation Techniques

Kalidindi

Mohan

Rossi

2016

JOM

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Mesoscale interfaces and interphases play a central role in controlling the many macroscale mechanical properties and performance characteristics of structural materials. Modern instrumented indenters present an unprecedented opportunity to measure, reliably and consistently, the local mechanical responses at a multitude of length scales ranging from tens of nanometers to hundreds of microns. When these high-fidelity measurements are combined with rigorous data analyses protocols, it is possible to systematically study the mechanical role of individual mesoscale interfaces and quantify their contributions to the overall mechanical response of the material system. The advantages of these new measurement and analyses protocols as well as the potential for development and implementation of novel high-throughput assays is discussed.

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Section: Grain/phase Boundaries In Metalsmentioning

confidence: 98%

“…3b are referred as grain boundary (GB) pop-ins. 61,62,[64][65][66][67] These are attributed to slip transfer events at the grain boundary. These occur at significantly higher load levels (after the sample has experienced a significant amount of plasticity in the indentation zone).…”

Section: Grain/phase Boundaries In Metalsmentioning

confidence: 99%

Mechanical Characterization of Mesoscale Interfaces Using Indentation Techniques

Kalidindi

Mohan

Rossi

2016

JOM

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“…This refinement considers metals with multiple types of slip systems. The purely geometric criterion (3) is applied in [47], while in [96], it is both applied and combined with investigations regarding the RBV criterion and incompatibility stresses. The importance of considering the RBV in the slip transmission prediction is emphasized in [97], as well.…”

Section: Criteria That Account For Slip System Orientations and Grainmentioning

confidence: 99%

“…In [46], it was concluded that the criteria are applicable for hexagonal close-packed (HCP) materials, too. For body-centered cubic (BCC) materials, the existing work is still not exhaustive up to date, e.g., [13,14,47,48]. In the latter two experimental works, the minimization of the RBV was confirmed for BCC.…”

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confidence: 99%

Review on slip transmission criteria in experiments and crystal plasticity models

et al. 2015

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A comprehensive overview is given of the literature on slip transmission criteria for grain boundaries in metals, with a focus on slip system and grain boundary orientation. Much of this extensive literature has been informed by experimental investigations. The use of geometric criteria in continuum crystal plasticity models is discussed. The theoretical framework of Gurtin (2008, J. Mech. Phys. Solids 56, p. 640) is reviewed for the single slip case. This highlights the connections to slip transmission criteria from the literature that are not discussed in the work itself. Different geometric criteria are compared for the single slip case with regard to their prediction of slip transmission. Perspectives on additional criteria, investigated in experiments and used in computational simulations, are given.

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“…12b), variation is observed between regions of similar grain size. This can be caused by differences in grain orientation [42,43] and dislocation slip transmission between grains [44,45]. The plastic zone from a hardness indentation is hemispheric, extending 1.0-1.9 times the contact radius with the highest plastic strain (>20 %) located directly underneath the indenter contact region [46].…”

Section: Diskusijamentioning

confidence: 99%

Characterisation of local grain size variation of welded structural steel

Lehto¹,

Romanoff²,

Remes³

et al. 2016

Zavarivanje i zavarene konstrukcije

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Previously, it has been shown that the grain size distribution plays an important role in the mechanical properties of welded steel. In the previous investigation, the volume-weighted average grain size has been shown to capture the influence of grain size distribution, resulting in a better fitting Hall-Petch relationship between grain size and hardness. However, the previous studies exclude the effects arising from local variation in grain size. In this paper, the grain size measurement methods are extended for the characterisation of the local grain size variation, which is significant for welded joints and can have an adverse effect on mechanical properties. The local gradient of grain size variation and its dependency on measurement direction are considered. In addition, examples of grain size and hardness variation are shown for S355 base metal and two weld metals, and characteristic differences are highlighted and discussed. The coarse-grained areas of a heterogeneous microstructure are found to have lower hardness than fine-grained areas. However, the surrounding microstructure, i.e. local grain size gradient, has an influence on the measured hardness values. RezimeRanije je pokazano da distribucija veličine zrna igra važnu ulogu vezanu za mehanička svojstva zavarenog čelika. U prethodnom istraživanju, zapreminski procenjena prosečna veličina zrna je pokazala uticaj distribucije veličine zrna, što je rezultovalo u boljem ispunjenju Hall-Petch-og odnosa između veličine zrna i tvrdoće. Međutim, prethodne studije isključuju učinke koji proizlaze iz lokalnih varijacija u veličini zrna. U ovom radu, metode merenja veličine zrna su proširene na karakterizaciju varijacije lokalne veličine zrna, što je značajno za zavarene spojeve jer mogu imati negativan uticaj na mehanička svojstva. Razmatraju se lokalni gradijent varijacije veličine zrna i njegova zavisnost od smera merenja. Osim toga, primeri veličine zrna i varijacije tvrdoće su prikazani za S355 kao osnovni materijal i dva šava metala, a karakteristične razlike su istaknute i o njima se diskutuje. Za područja krupnozrne heterogene mikrostrukture utvrđeno je da imaju manju tvrdoću od sitnozrnog područja. Međutim, okružujuća mikrostruktura, t.j. gradijent lokalne veličine zrna, ima uticaj na izmerene vrednosti tvrdoće.

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Detection of grain-boundary resistance to slip transfer using nanoindentation

Cited by 92 publications

References 12 publications

Mechanical Characterization of Mesoscale Interfaces Using Indentation Techniques

Mechanical Characterization of Mesoscale Interfaces Using Indentation Techniques

Review on slip transmission criteria in experiments and crystal plasticity models

Characterisation of local grain size variation of welded structural steel

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