An investigation on the nano-abrasion wear mechanisms of KDP crystals

Yang, Shengyao; Zhang, Liangchi; Wu, Zhonghuai

doi:10.1016/j.wear.2021.203692

Cited by 20 publications

(10 citation statements)

References 45 publications

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“…The MD simulations of the KDP deformation were performed based on the interaction potential function, and the interaction between the indenter and the workpiece was described by the LJ potential . The detailed parameter determination of the potential functions can be found in refs , . OVITO software was used to visualize the simulation results .…”

Section: Methodsmentioning

confidence: 99%

“…Previously, little MD analysis could be done on KDP because a reliable potential function was unavailable. Recently, Yang et al − reported a comprehensive interaction potential function specifically developed for KDP. This makes a reliable MD analysis of KDP deformation possible.…”

Section: Introductionmentioning

confidence: 99%

“…The aim of this paper is to reveal the anisotropic deformation mechanisms of KDP at the atomic scale using MD simulation with the aid of the potential function of Yang et al − To this end, the deformation of KDP under nanoindentation on the (001) and (100) lattice orientation surfaces will be carried out comprehensively. To facilitate the structural characterization of KDP, a machine learning-based method will be developed.…”

Section: Introductionmentioning

confidence: 99%

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Effect of Anisotropy of Potassium Dihydrogen Phosphate Crystals on Its Deformation Mechanisms Subjected to Nanoindentation

Yang

Zhang

2021

ACS Appl. Mater. Interfaces

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Potassium dihydrogen phosphate (KDP) is an important nonlinear material due to its excellent physical and optical properties. However, it is also a difficult-to-machine material due to its complex anisotropic microstructure. To better understand the deformation mechanisms under external stresses, this paper aims to carry out systematic nanoindentation simulations using molecular dynamics (MD). To facilitate the structural characterization of KDP, a machine learning-based method was developed. The results showed that the subsurface damage is obviously anisotropic. On the (001) surface, both tetragonal and monoclinic phases appear simultaneously and part of the monoclinic phase transfers to the tetragonal phase. The generated phases close to the surface undergo amorphization and are squeezed out to form pile-ups. On the (100) surface, however, an orthorhombic phase emerges directly from the original structure rather than transforming through the monoclinic phase. No amorphization happens and no pile-ups appear in this case. The first “pop-in” in the load–displacement curve of nanoindentation signified the emergence of phase transformation under the combined hydrostatic and shear stresses. After unloading, the recovery of the deformed KDP is also anisotropic. The maximum recovery takes place when the indentation is on the (100) surface.

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Section: Methodsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Effect of Anisotropy of Potassium Dihydrogen Phosphate Crystals on Its Deformation Mechanisms Subjected to Nanoindentation

Yang

Zhang

2021

ACS Appl. Mater. Interfaces

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“…The machinability of one material can not only be evaluated by its material properties estimated by nanoindentation tests but also be reflected by the material removal behaviours in nano scratch processes [24][25][26], which are normally employed to simulate the cutting behaviours in actual machining processes [27]. During nano scratch processes, different deformation morphologies arising on the residual scratch grooves provide essential information revealing the various removal behaviours of tested materials.…”

Section: Introductionmentioning

confidence: 99%

On the improvement of the ductile removal ability of brittle KDP crystal via temperature effect

Liu

Chen

Liao

et al. 2021

Ceramics International

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“…Atomistic simulations have been used to reveal the deformation mechanisms of many advanced materials including KDP. [29][30][31][32][33] Mylvaganam et al 34 investigated the symmetry/ phase transformation of KDP under several loading conditions by using ab initio simulations. Yang et al 35 established a criterion for assessing those with the aid of the molecular dynamics (MD) simulations.…”

mentioning

confidence: 99%

Characterization and criteria of phase transformations and lattice slipping in potassium dihydrogen phosphate crystals

Yang

Zhang

2021

J. Am. Ceram. Soc.

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Potassium dihydrogen phosphate (KDP) is an important nonlinear optical material. Since the 1930s, this material has attracted significant attention because of its excellent physical and optical properties. [1][2][3][4] KDP has been widely used in many technological fields, such as laser frequency conversion, high-speed Q-switching, optical communication, and optical signal processing. [5][6][7][8][9] At the present, one can easily obtain a large aperture KDP with the rapid growth technology. 10,11 To use a KDP component in high-energy laser systems [12][13][14][15] ; however, it is required to minimize the surface and subsurface damages which are mostly introduced in a mechanical surface finishing process. An ideal outcome is that the manufactured KDP component is totally damage free. However, KDP is one of the most difficult-to-handle materials due to its fragility, unstable microstructure, and complicated mechanical behavior. 16,17 A low-quality surface or subsurface can easily reduce the laser-damage threshold (LDT) and the service life of a KDP component. 18,19 How to overcome the difficulties and improve the machinability of KDP has been challenging.There are many issues in relation to the damage-free manufacture of a KDP component, among which the most critical is its complicated deformation mechanisms under external loading. At stressing, a KDP crystal can undergo

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An investigation on the nano-abrasion wear mechanisms of KDP crystals

Cited by 20 publications

References 45 publications

Effect of Anisotropy of Potassium Dihydrogen Phosphate Crystals on Its Deformation Mechanisms Subjected to Nanoindentation

Effect of Anisotropy of Potassium Dihydrogen Phosphate Crystals on Its Deformation Mechanisms Subjected to Nanoindentation

On the improvement of the ductile removal ability of brittle KDP crystal via temperature effect

Characterization and criteria of phase transformations and lattice slipping in potassium dihydrogen phosphate crystals

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