Notch effects on deformation of crystalline and amorphous AlN – A nanoscale study

Zhao, Yinbo; Peng, Xianghe; Huang, Cheng; Fu, Tao; Yang, Bo; Hu, Ning; Yan, Cheng

doi:10.1016/j.ceramint.2018.09.266

Cited by 8 publications

(3 citation statements)

References 33 publications

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“…Systematic simulations are performed with the Large-scale Atomic/Molecular Massively Parallel Simulator (LAMMPS) [30], which is open code and has the functions required for this research. The atomic interactions within the Al-N are modelled with the Vashishta potential [31], which has been widely used to investigate the deformation mechanism of AlN under different kinds of loading conditions [13,29,32,33]. The integration time step of 1 fs is adopted in all the simulations.…”

Section: Methodsmentioning

confidence: 99%

“…Molecular dynamics simulation (MD) can serve as an effective means to gain an insight into the microstructure in NG ceramics and their evolution during deformation. MD simulation has been widely adopted to investigate different kinds of mechanical response of various atomic structures, such as dislocations [25,26], nano-twin boundaries [27,28], and shear bands [13,29], etc. with the Large-scale Atomic/Molecular Massively Parallel Simulator (LAMMPS) algorithm [30].…”

Section: Introductionmentioning

confidence: 99%

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Super Ductility of Nanoglass Aluminium Nitride

et al. 2019

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Ceramics have been widely used in many fields because of their distinctive properties, however, brittle fracture usually limits their application. To solve this problem, nanoglass ceramics were developed. In this article, we numerically investigated the mechanical properties of nanoglass aluminium nitride (ng-AlN) with different glassy grain sizes under tension using molecular dynamics simulations. It was found that ng-AlN exhibits super ductility and tends to deform uniformly without the formation of voids as the glassy grain size decreases to about 1 nm, which was attributed to a large number of uniformly distributed shear transformation zones (STZs). We further investigated the effects of temperature and strain rate on ng-AlNd = 1 nm, which showed that temperature insignificantly influences the elastic modulus, while the dependence of the ultimate strength on temperature follows the T2/3 scaling law. Meanwhile, the ultimate strength of ng-AlNd = 1 nm is positively correlated with the strain rate, following a power function relationship.

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Section: Methodsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Super Ductility of Nanoglass Aluminium Nitride

et al. 2019

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“…Many research works among whom are [12][13][14][15][16][17][18][19][20][21][22] Hence, the objective of this work is to examine the characteristics of the two high strength steels (high carbon steel and stainless steel) under tensile, torsion and impact loading conditions. The behaviour of the materials were examined under V-shaped notch geometry of different notch parameters of angle 30°, 45° and 60° and notch base radius of 0.5 mm and 1.0 mm.…”

Section: Introductionmentioning

confidence: 99%

Characteristics of Notched High Strength Materials Under Tension, Torsion and Impact Loading.

Abdulkareem

Busari

Fashola

et al. 2020

IJEMM

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High carbon steel (AISI 1065) and stainless steel (AISI 304) are high strength materials that are mostly used as wear resistance materials because of there high hardness and toughness. These two materials are widely used for applications in which high strength, hardness and wear resistance are required, these requirement are fund in cutting tools, springs and surgical instruments. Nevertheless, the presence of notch in these materials do affect their service life. This paper reports on the characteristics of notched high carbon steel and stainless steel materials investigated under tensile, torsion and impact loads. The behaviour of the materials were examined under different notch parameters of angle 30°, 45° and 60° and notch base radius of 0.5 mm and 1.0 mm. The tensile, torsion and impact test samples were prepared according to ASTM E8M, ASTM F383-15 and ASTM E23-16b respectively. Examination on the tensile and torsion tests were carried out on Testometric Universal Testing Machine (TUTM), while Avery-Denison Izod impact testing machine was used for impact test. The results obtained for the two materials showed that there is increase in absorption energy and resistance to twisting failure as notch tip radius and notch angle increase.

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Fracture mechanics of methane clathrate hydrates

Liu

et al. 2021

Acta Mech. Sin.

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Notch effects on deformation of crystalline and amorphous AlN – A nanoscale study

Cited by 8 publications

References 33 publications

Super Ductility of Nanoglass Aluminium Nitride

Super Ductility of Nanoglass Aluminium Nitride

Characteristics of Notched High Strength Materials Under Tension, Torsion and Impact Loading.

Fracture mechanics of methane clathrate hydrates

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