Cracking Resistance and Impact Wear of Thin and Thick Hard Coatings Under Cyclic Loading

2012 ◽  
pp. 574-589
Author(s):  
Priit Kulu ◽  
Mart Saarna ◽  
Fjodor Sergejev ◽  
Andrei Surženkov ◽  
Alina Sivitski
Keyword(s):  
Cyclic Loading ◽  
Hard Coatings ◽  
Impact Wear ◽  
Cracking Resistance

Cracking Resistance and Impact Wear of Thin and Thick Hard Coatings Under Cyclic Loading

2012 ◽  
pp. 574-589
Author(s):  
Priit Kulu ◽  
Mart Saarna ◽  
Fjodor Sergejev ◽  
Andrei Surženkov ◽  
Alina Sivitski
Keyword(s):  
Cyclic Loading ◽  
Hard Coatings ◽  
Impact Wear ◽  
Cracking Resistance

Cracking Resistance and Impact Wear of Thin and Thick Hard Coatings Under Cyclic Loading

2012 ◽  
Vol 9 (2) ◽  
pp. 104108
Author(s):  
S. W. Dean ◽  
Priit Kulu ◽  
Mart Saarna ◽  
Fjodor Sergejev ◽  
Andrei Surženkov ◽  
...  
Keyword(s):  
Cyclic Loading ◽  
Hard Coatings ◽  
Impact Wear ◽  
Cracking Resistance

Impact Wear Performance of Thin Hard Coatings on TiC Cermets

2011 ◽  
pp. 404-419
Author(s):  
Renno Veinthal ◽  
Fjodor Sergejev ◽  
Can Emrah Yaldiz ◽  
Valdek Mikli
Keyword(s):  
Hard Coatings ◽  
Impact Wear ◽  
Wear Performance

Impact Wear Performance of Thin Hard Coatings on TiC Cermets

2011 ◽  
pp. 404-419
Author(s):  
Renno Veinthal ◽  
Fjodor Sergejev ◽  
Can Emrah Yaldiz ◽  
Valdek Mikli
Keyword(s):  
Hard Coatings ◽  
Impact Wear ◽  
Wear Performance

Application of the indentation method for cracking resistance evaluation of hard coatings on tool steels

2009 ◽  
Vol 15 (4) ◽  
pp. 309 ◽  
Author(s):  
A Sivitski ◽  
A Gregor ◽  
M Saarna ◽  
P Kulu ◽  
F Sergejev
Keyword(s):  
Hard Coatings ◽  
Tool Steels ◽  
Cracking Resistance ◽  
Indentation Method ◽  
Resistance Evaluation

Cracking resistance of thin hard coatings estimated by four-point bending

1997 ◽  
Vol 91 (1-2) ◽  
pp. 57-63 ◽  
Author(s):  
Urban Wiklund ◽  
Michael Bromark ◽  
Mats Larsson ◽  
Per Hedenqvist ◽  
Sture Hogmark
Keyword(s):  
Hard Coatings ◽  
Cracking Resistance ◽  
Four Point Bending

Impact Wear Performance of Thin Hard Coatings on TiC Cermets

2011 ◽  
Vol 8 (7) ◽  
pp. 103272 ◽  
Author(s):  
Renno Veinthal ◽  
Fjodor Sergejev ◽  
Can Emrah Yaldiz ◽  
Valdek Mikli ◽  
L. Canale ◽  
...  
Keyword(s):  
Hard Coatings ◽  
Impact Wear ◽  
Wear Performance

Microstructural characterization of sol-gel coating on PET films

1994 ◽  
Vol 52 ◽  
pp. 886-887
Author(s):  
R. T. Chen ◽  
R.A. Norwood
Keyword(s):  
Ion Beam ◽  
Sol Gel ◽  
Industrial Applications ◽  
Hard Coatings ◽  
Nanometer Scale ◽  
Ion Beam Sputtering ◽  
Process Technology ◽  
Refractive Index Measurement ◽  
Organically Modified ◽  
Pet Films

Sol-gel processing has been used to control the structure of a material on a nanometer scale in preparing advanced ceramics and glasses. Film coating using the sol-gel process was also found to be a viable process technology in applications such as optical, porous, antireflection and hard coatings. In this study, organically modified silicate (Ormosil) coatings are applied to PET films for various industrial applications. Sol-gel materials are known to exhibit nanometer scale structures which havepreviously been characterized by small-angle X-ray scattering (SAXS), neutron scattering and light scattering. Imaging of the ultrafine sol-gel structures has also been performed using an ultrahigh resolution replica/TEM technique. The objective of this study was to evaluate the ultrafine structures inthe sol gel coatings using a direct imaging technique: atomic force microscopy (AFM). In addition, correlation of microstructures with processing parameters, coating density and other physical properties will be discussed.The materials evaluated are organically modified silicate coatings on PET film substrates. Refractive index measurement by the prism coupling method was used to assess density of the sol-gel coating.AFM imaging was performed on a Nanoscope III AFM (by Digital Instruments) using constant force mode. Solgel coating samples coated with a thin layer of Ft (by ion beam sputtering) were also examined by STM in order to confirm the structures observed in the contact type AFM. In addition, to compare the previous results, sol-gel powder samples were also prepared by ultrasonication followed by Pt/Au shadowing and examined using a JEOL 100CX TEM.

Comparative study of the effective parameters on residual stress relaxation in welded aluminum plates under cyclic loading

2020 ◽  
Vol 21 (5) ◽  
pp. 505
Author(s):  
Yousef Ghaderi Dehkordi ◽  
Ali Pourkamali Anaraki ◽  
Amir Reza Shahani
Keyword(s):  
Residual Stress ◽  
Cyclic Loading ◽  
Stress Relaxation ◽  
Stress Amplitude ◽  
Cyclic Plasticity ◽  
Mean Stress ◽  
Effective Parameters ◽  
Perfect Plasticity ◽  
Residual Stress Relaxation ◽  
Aluminum Plates

The prediction of residual stress relaxation is essential to assess the safety of welded components. This paper aims to study the influence of various effective parameters on residual stress relaxation under cyclic loading. In this regard, a 3D finite element modeling is performed to determine the residual stress in welded aluminum plates. The accuracy of this analysis is verified through experiment. To study the plasticity effect on stress relaxation, two plasticity models are implemented: perfect plasticity and combined isotropic-kinematic hardening. Hence, cyclic plasticity characterization of the material is specified by low cycle fatigue tests. It is found that the perfect plasticity leads to greater stress relaxation. In order to propose an accurate model to compute the residual stress relaxation, the Taguchi L18 array with four 3-level factors and one 6-level is employed. Using statistical analysis, the order of factors based on their effect on stress relaxation is determined as mean stress, stress amplitude, initial residual stress, and number of cycles. In addition, the stress relaxation increases with an increase in mean stress and stress amplitude.

Sign in / Sign up

Export Citation Format

Share Document