The influence of WS2 layer thickness on microstructures and mechanical behavior of (AlCrTiZrNb)N/WS2 nanomultilayered films

2022 ◽  
pp. 128091
Author(s):  
Panpan Cui ◽  
Wei Li ◽  
Ping Liu ◽  
Jingjing Wang ◽  
Xun Ma ◽  
...  
Keyword(s):  
Mechanical Behavior ◽  
Layer Thickness

Evaluation of the printing strategies design on the mechanical and tribological response of acrylonitrile styrene acrylate (ASA) additive manufacturing parts

2021 ◽  
Vol ahead-of-print (ahead-of-print) ◽  
Author(s):  
Juan Manuel Vázquez Martínez ◽  
David Piñero Vega ◽  
Jorge Salguero ◽  
Moises Batista
Keyword(s):  
Additive Manufacturing ◽  
Friction Coefficient ◽  
Wear Rate ◽  
Mechanical Behavior ◽  
Layer Thickness ◽  
Fused Filament Fabrication ◽  
Friction Forces ◽  
Content Type ◽  
Printing Parameters ◽  
Manufacturing Parameters

Purpose The evaluation of novel materials such as the acrylonitrile styrene acrylate (ASA) for tribological and mechanical conditions can provide a structural protection against the environmental and wear effects that results in the long-term integrity of the 3 D printed parts. Results of the experimental stage are intended to identify the influence of the printing conditions on the functional characteristics of ASA parts that results in variations of the friction coefficient, wear rate and tensile response. In addition, this study aims to highlight the relevance of printing parameters to avoid the use of chemical post-processing stages, increasing the performance and sustainability of the process. Design/methodology/approach In this research, an evaluation of the influence of printing parameters of layer thickness and temperature on the mechanical and tribological response have been carried out for ASA specimens manufactured by fused filament fabrication technology. For this purpose, a range of three different values of thickness of fused layer and three different printing temperatures were combined in the manufacturing process of tests samples. Mechanical behavior of the printed parts was evaluated by standard tensile tests, and friction forces were measured by pin-on-disk tribological tests against steel spheres. Findings Higher layer thickness of the printed parts shows lower resistance to tribological wear effects; in terms of friction coefficient and wear rate, this type of parts also presents lower tensile strength. It has been detected that mechanical and tribological behavior is highly related to the micro-geometrical characteristics of the printed surfaces, which can be controlled by the manufacturing parameters. Under this consideration, a reduction in the coefficient of friction near to 65% in the average value was obtained through the variation of the layer thickness of printed surfaces. Originality/value This research aims to fill a gap in the scientific literature about the use of specific additive manufacturing materials under dynamic contact. This paper is mainly focused on the influence of the manufacturing parameters on the tribological and mechanical behavior of a weather resistant polymer (ASA).

Mechanical Behavior of a Ni/TiC Microlaminate Under Static and Fatigue Loading

1996 ◽  
Vol 434 ◽  
Author(s):  
Y. C. Her ◽  
P. C. Wang ◽  
J.-M. Yang ◽  
R. F. Bunshah
Keyword(s):  
Tensile Strength ◽  
Ultimate Tensile Strength ◽  
Mechanical Behavior ◽  
Layer Thickness ◽  
Room Temperature ◽  
Fatigue Behavior ◽  
Fatigue Loading ◽  
Stiffness Reduction ◽  
Static And Cyclic Loading ◽  
The Relationship

AbstractThe mechanical behavior and damage mechanisms of the Ni/TiC microlaminate composites under static and cyclic loading were investigated. The relationship between the ultimate tensile strength and the layer thickness at both room temperature and 600°C was studied. The fatigue life and the evolution of the stiffness reduction under various maximum applied stress levels were determined. The results revealed that the ultimate tensile strength linearly increased as the laminate layer thickness decreased. Also, the microlaminate exhibited a non-progressive fatigue behavior.

scholarly journals Mechanical behavior of SiNC layers on PDMS: effects of layer thickness, PDMS modulus, and SiNC surface functionality

RSC Advances ◽  
2020 ◽  
Vol 10 (64) ◽  
pp. 39087-39091 ◽  
Author(s):  
Alborz Izadi ◽  
Mayank Sinha ◽  
Cameron Papson ◽  
Sara Roccabianca ◽  
Rebecca Anthony
Keyword(s):  
Mechanical Behavior ◽  
Layer Thickness ◽  
Surface Functionality

Experimental/theoretical estimations of the neo-Hookean coefficients of SiNC layers on PDMS show a dependence on layer thickness as well as on the modulus of the PDMS, but not on the surface functionality of the SiNCs.

The effects of decreasing layer thickness on the high temperature mechanical behavior of Cu/Nb nanoscale multilayers

2007 ◽  
Vol 515 (6) ◽  
pp. 3241-3245 ◽  
Author(s):  
N.A. Mara ◽  
T. Tamayo ◽  
A.V. Sergueeva ◽  
X. Zhang ◽  
A. Misra ◽  
...  
Keyword(s):  
High Temperature ◽  
Mechanical Behavior ◽  
Layer Thickness

The microstructure and mechanical behavior of Mg/Ti multilayers as a function of individual layer thickness

2014 ◽  
Vol 63 ◽  
pp. 216-231 ◽  
Author(s):  
Y.Y. Lu ◽  
R. Kotoka ◽  
J.P. Ligda ◽  
B.B. Cao ◽  
S.N. Yarmolenko ◽  
...  
Keyword(s):  
Mechanical Behavior ◽  
Layer Thickness ◽  
Individual Layer ◽  
Individual Layer Thickness

scholarly journals Effect of Layer Thickness and Orientation on Mechanical Behavior of Binder Jet Stainless Steel 420 + Bronze Parts

2015 ◽  
Vol 1 ◽  
pp. 251-262 ◽  
Author(s):  
Michael Doyle ◽  
Kuldeep Agarwal ◽  
Winston Sealy ◽  
Kevin Schull
Keyword(s):  
Stainless Steel ◽  
Mechanical Behavior ◽  
Layer Thickness

Application of TEM to Deformation, Wear, and Fracture of Ceramics

1974 ◽  
Vol 32 ◽  
pp. 472-473
Author(s):  
B. J. Hockey
Keyword(s):  
Wear Resistance ◽  
High Temperature ◽  
Mechanical Behavior ◽  
Brittle Materials ◽  
High Temperature Strength ◽  
Wide Range ◽  
Corrosive Environments ◽  
Further Development

Ceramics, such as Al2O3 and SiC have numerous current and potential uses in applications where high temperature strength, hardness, and wear resistance are required often in corrosive environments. These materials are, however, highly anisotropic and brittle, so that their mechanical behavior is often unpredictable. The further development of these materials will require a better understanding of the basic mechanisms controlling deformation, wear, and fracture.The purpose of this talk is to describe applications of TEM to the study of the deformation, wear, and fracture of Al2O3. Similar studies are currently being conducted on SiC and the techniques involved should be applicable to a wide range of hard, brittle materials.

Structure and Orientation of As Precipitates in LT-MBE Grown GaAs

1991 ◽  
Vol 49 ◽  
pp. 900-901 ◽  
Author(s):  
Alain Claverie ◽  
Zuzanna Liliental-Weber
Keyword(s):  
Transport Properties ◽  
Layer Thickness ◽  
Growth Temperature ◽  
Low Temperatures ◽  
Lattice Parameter ◽  
Crystalline Quality ◽  
Insulating Properties ◽  
Lt Gaas

GaAs layers grown by MBE at low temperatures (in the 200°C range, LT-GaAs) have been reported to have very interesting electronic and transport properties. Previous studies have shown that, before annealing, the crystalline quality of the layers is related to the growth temperature. Lowering the temperature or increasing the layer thickness generally results in some columnar polycrystalline growth. For the best “temperature-thickness” combinations, the layers may be very As rich (up to 1.25%) resulting in an up to 0.15% increase of the lattice parameter, consistent with the excess As. Only after annealing are the technologically important semi-insulating properties of these layers observed. When annealed in As atmosphere at about 600°C a decrease of the lattice parameter to the substrate value is observed. TEM studies show formation of precipitates which are supposed to be As related since the average As concentration remains almost unchanged upon annealing.

The stabilization of B.C.C. Cu in Cu/Nb nanolayered composites

1996 ◽  
Vol 54 ◽  
pp. 228-229
Author(s):  
H. Kung ◽  
A.J. Griffin ◽  
Y.C. Lu ◽  
K.E. Sickafus ◽  
T.E. Mitchell ◽  
...  
Keyword(s):  
Electrical Resistivity ◽  
Layer Thickness ◽  
Volume Fraction ◽  
Ion Beam ◽  
High Strength ◽  
Cross Sectional ◽  
Metastable Structure ◽  
High Resolution Tem ◽  
Potential Improvement ◽  
Two Phases

Materials with compositionally modulated structures have gained much attention recently due to potential improvement in electrical, magnetic and mechanical properties. Specifically, Cu-Nb laminate systems have been extensively studied mainly due to the combination of high strength, and superior thermal and electrical conductivity that can be obtained and optimized for the different applications. The effect of layer thickness on the hardness, residual stress and electrical resistivity has been investigated. In general, increases in hardness and electrical resistivity have been observed with decreasing layer thickness. In addition, reduction in structural scale has caused the formation of a metastable structure which exhibits uniquely different properties. In this study, we report the formation of b.c.c. Cu in highly textured Cu/Nb nanolayers. A series of Cu/Nb nanolayered films, with alternating Cu and Nb layers, were prepared by dc magnetron sputtering onto Si {100} wafers. The nominal total thickness of each layered film was 1 μm. The layer thickness was varied between 1 nm and 500 nm with the volume fraction of the two phases kept constant at 50%. The deposition rates and film densities were determined through a combination of profilometry and ion beam analysis techniques. Cross-sectional transmission electron microscopy (XTEM) was used to examine the structure, phase and grain size distribution of the as-sputtered films. A JEOL 3000F high resolution TEM was used to characterize the microstructure.

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