The ultra-small strongest grain size in nanocrystalline Ni nanowires

Cao, Ronggen; Deng, Chuang

doi:10.1016/j.scriptamat.2014.09.002

Cited by 15 publications

(7 citation statements)

References 26 publications

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“…Molecular dynamics (MD) simulation is very suitable for studying mechanical deformation and physical properties, providing atomic-resolution details on deformation processes that cannot be obtained experimentally. Many nanosystems have been analyzed using MD, such as nanoscratching [12,13], nanoimprinting [14,15], nanowelding [16], and nanowires [17,18].…”

Section: Introductionmentioning

confidence: 99%

Grain size effect on indentation of nanocrystalline copper

Huang

Chiang

Fang

2015

Applied Surface Science

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Section: Introductionmentioning

confidence: 99%

Grain size effect on indentation of nanocrystalline copper

Huang

Chiang

Fang

2015

Applied Surface Science

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“…GBs can be heavily involved in the plastic deformation processes of materials and their contribution to the plastic deformation depends on grain size. Previous investigations of polycrystalline FCC metals show that the competition between GB-mediated plasticity and dislocation-mediated plasticity determines the transition from a Hall-Petch relationship to an inverse Hall-Petch relationship [22][23][24][25]. This transition also exists in BCC metals [90][91][92][93][94].…”

Section: Gb-mediated Plasticity In Bcc Metalsmentioning

confidence: 82%

“…The change of material dimensions from bulk to micron or nano influences the volume fraction of internal microstructural defects and the surface effects on materials' mechanical behavior. Extensive experiments and computational simulations have revealed significant size effects on the plastic deformation mechanisms of materials [19,[22][23][24][25][26]. For single crystalline materials, a "smaller is stronger" phenomenon exists in different crystal systems [27][28][29][30][31][32][33].…”

Section: Introductionmentioning

confidence: 99%

“…The size effects on the elasticity and plasticity of facecentered cubic (FCC) materials, which are the most frequently used materials in micro-and nano-technology, have been extensively investigated [22][23][24][25][26]29,[32][33][34][35][36]40,41] and comprehensively reviewed [3,4,[42][43][44][45]. Recently, body-centered cubic (BCC) metals have triggered increasing interest for their broad applications [46][47][48][49][50][51].…”

Section: Introductionmentioning

confidence: 99%

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Size effect for achieving high mechanical performance body-centered cubic metals and alloys

2018

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Submicron and nanostructured body-centered cubic (BCC) metals exhibit unusual mechanical performance compared to their bulk coarse-grained counterparts, including high yield strength and outstanding ductility. These properties are important for their applications in micro-, nano-and even atomic-scale devices as well as for their usages as components for enhancing the performances of structural materials. One aspect of the unusual mechanical properties of small-sized BCC metals is closely related to their dimensional confinement. Decreasing the dimensions of single crystalline metals or the grain sizes of polycrystalline metals contributes significantly to the strengthening of the small-sized BCC metals. In the last decade, significant progress has been achieved in understanding the plasticity and deformation behaviors of small-sized BCC metals. This paper aims to provide a comprehensive review on the current understanding of size effects on the plasticity and deformation mechanisms of small-sized BCC metals. The techniques used for in situ characterization of the deformation behavior and mechanical properties of small-sized samples are also presented.

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“…In this method, the trajectories of atoms and molecules are determined by solving Newton's equations of motion. This technique is used for fundamental understanding of the deformation mechanisms in metals and alloys [1][2][3][4][5][6][7][8].…”

Section: Introductionmentioning

confidence: 99%

Tensile properties of AlCrCoFeCuNi glassy alloys: A molecular dynamics simulation study

Afkham

Bahramyan

Mousavian

et al. 2017

Materials Science and Engineering: A

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High-entropy alloys (HEAs) are among multi-component alloys with attractive microstructures and mechanical properties. In this study, molecular dynamics simulation was used to determine the tensile behaviour of glassy Al x CrCoFeCuNi HEAs from 300 • K to 1300 • K. For this purpose, this alloy with variations in chemical concentration of aluminum were heated and then cooled at a high cooling rate of 0.211 × 10 12 K/s. Results from radial distribution functions (RDF) and common neighbor analysis (CNA) indicated that no crystalline structures were formed for these glassy alloys. The deformation behaviour and mechanisms of the glassy alloys at room and high temperatures and various strain rates were investigated and reported. The tensile test results showed that the yield stress decreased markedly as temperature was increased for all the alloys. The alloys exhibited superplastic behaviour for all test conditions. More importantly, by increasing the molar ratio of aluminum from 0.5 to 3.0, the yield stress and elastic modulus decreased considerably. Also, the yield stress increased with increasing the strain rate for all samples with different aluminum concentrations. Free volume content of the alloys as well as shear banding were evaluated for these alloys to aid explanation of these results.

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The ultra-small strongest grain size in nanocrystalline Ni nanowires

Cited by 15 publications

References 26 publications

Grain size effect on indentation of nanocrystalline copper

Grain size effect on indentation of nanocrystalline copper

Size effect for achieving high mechanical performance body-centered cubic metals and alloys

Tensile properties of AlCrCoFeCuNi glassy alloys: A molecular dynamics simulation study

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