Experimental nanoindentation of BCC metals

Voyiadjis, George Z.; Almasri, Amin H.; Park, Taehyo

doi:10.1016/j.mechrescom.2010.02.001

Cited by 56 publications

(37 citation statements)

References 46 publications

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“…The interaction between the effects of grain size with indentation size effects have been addressed both theoretically and experimentally [100][101][102][103][104][105][106][107][108]. Here, the experimental and theoretical studies conducted by Voyiadjis and his coworkers [103][104][105][106][107][108] are discussed in more detail.…”

Section: Interaction Of Size Effects During Nanoindentation and Grainmentioning

confidence: 99%

“…Here, the experimental and theoretical studies conducted by Voyiadjis and his coworkers [103][104][105][106][107][108] are discussed in more detail. Figure 8 compares the response of single crystalline and polycrystalline Al during nanoindentation.…”

Section: Interaction Of Size Effects During Nanoindentation and Grainmentioning

confidence: 99%

“…In the case of polycrystalline Al, however, a local hardening can be observed, which is due to the effect of the grain boundary (GB). In order to capture the effect of GB, the theoretical model has been proposed by Voyiadjis and his coworkers [103][104][105][106][107][108] based on the concept of GNDs and the methodology developed by Nix and Gao [13]. Figure 9 depicts the effect of GB on the dislocation movement pattern during nanoindentation.…”

Section: Interaction Of Size Effects During Nanoindentation and Grainmentioning

confidence: 99%

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Review of Nanoindentation Size Effect: Experiments and Atomistic Simulation

2017

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Nanoindentation is a well-stablished experiment to study the mechanical properties of materials at the small length scales of micro and nano. Unlike the conventional indentation experiments, the nanoindentation response of the material depends on the corresponding length scales, such as indentation depth, which is commonly termed the size effect. In the current work, first, the conventional experimental observations and theoretical models of the size effect during nanoindentation are reviewed in the case of crystalline metals, which are the focus of the current work. Next, the recent advancements in the visualization of the dislocation structure during the nanoindentation experiment is discussed, and the observed underlying mechanisms of the size effect are addressed. Finally, the recent computer simulations using molecular dynamics are reviewed as a powerful tool to investigate the nanoindentation experiment and its governing mechanisms of the size effect.

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Section: Interaction Of Size Effects During Nanoindentation and Grainmentioning

confidence: 99%

Section: Interaction Of Size Effects During Nanoindentation and Grainmentioning

confidence: 99%

Section: Interaction Of Size Effects During Nanoindentation and Grainmentioning

confidence: 99%

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Review of Nanoindentation Size Effect: Experiments and Atomistic Simulation

2017

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“…In the work reported here the Poisson's ratio of hot-pressed B 4 C, whose structure is similar to that of B 6 O, was used as an estimate of B 6 O's Poisson's ratio. The assumption being that a rough estimation of Poisson's ratio for does not significantly affect the obtained results [28]. At least twelve separate indents were performed at different positions on the sample surface.…”

Section: Nanoindentation Measurementsmentioning

confidence: 99%

Nanoindentation hardness of hot-pressed boron suboxide

Machaka¹,

Derry²,

Sigalas³

2011

Materials Science and Engineering: A

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“…Размерный эффект в твердости исследовался и для моно-и поликристаллов ОЦК-металлов [51]. Твердость монокристалла вольфрама зависела не только от вели-чины приложенной нагрузки, но и от ориентации моно-кристалла и ориентации индентора относительно осей кристалла [52].…”

Section: юи головин вв коренков сс разливаловаunclassified

Влияние Малоамплитудных Осцилляций Нагрузки На Наноконтактные Характеристики Материалов В Процессе Наноиндентирования

Головин¹,

Коренков²,

Razlivalova³

2017

Физика Твердого Тела

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Критически проанализирован метод непрерывного измерения контактной жесткости, позволяющий непрерывно определять физико-механические свойства исследуемых материалов в процессе внедрения индентора под действием медленно растущей нагрузки при наноиндентировании. Границы применимости этого подхода к характеризации определяются условиями тестирования, при которых дополнительное наложение малоамплитудных осцилляций не влияет на механизмы, кинетику и величину пластической деформации материала под индентором. На примере материалов с аморфной структурой, ГЦК- и ОЦК-решетками показано, что различные методы определения наноконтактных характеристик материалов обладают разной чувствительностью к малоамплитудным осцилляциям нагрузки. Определены значения амплитуд осцилляций и диапазон глубин отпечатка, для которых влиянием осцилляций можно пренебречь. Выявлены закономерности влияния осцилляций на поведение контактных (локальных) характеристик исследованных материалов в закритических режимах. Работа выполнена при поддержке Российского научного фонда (грант N 15-19-00181). DOI: 10.21883/FTT.2017.06.44483.398

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Experimental nanoindentation of BCC metals

Cited by 56 publications

References 46 publications

Review of Nanoindentation Size Effect: Experiments and Atomistic Simulation

Review of Nanoindentation Size Effect: Experiments and Atomistic Simulation

Nanoindentation hardness of hot-pressed boron suboxide

Влияние Малоамплитудных Осцилляций Нагрузки На Наноконтактные Характеристики Материалов В Процессе Наноиндентирования

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