scholarly journals Cavitation Erosion and Wear Mechanisms of AlTiN and TiAlN Films Deposited on Stainless Steel Substrate

2019 ◽  
Author(s):  
Mirosław Szala ◽  
Mariusz Walczak ◽  
Kamil Pasierbiewicz ◽  
Mariusz Kamiński
Keyword(s):  
Stainless Steel ◽  
Elastic Modulus ◽  
Wear Mechanisms ◽  
Sliding Wear ◽  
Cavitation Erosion ◽  
Stainless Steel Substrate ◽  
Steel Substrate ◽  
Scratch Test ◽  
Optical Microscope ◽  
Material Transfer

Stainless steel grade AISI 304 is one of the most widespread modern structural material, alas its sliding wear and cavitation wear resistance are limited. Thus, AlTiN and TiAlN coatings can be deposited for increasing the resistance to wear of stainless steel components. The aim of the work was to investigate the cavitation erosion and sliding wear mechanisms of magnetron sputtered AlTiN and TiAlN coatings deposited on SS304 stainless steel. Films surface morphology and structure were examined using a profilometer, light optical microscope (LOM) and scanning electron microscope (SEM). The mechanical properties (hardness, elastic modulus) were tested by nanoindentation tester. The adhesion of deposited coatings was determined by means of the scratch test and Rockwell test. Cavitation erosion tests were performed according to ASTM G32 (vibratory apparatus) with stationary specimen procedure. Sliding wear tests were conducted using a nano-tribo testes i.e. ball-on-disc apparatus. Wear mechanisms are strongly contingent upon the structure and morphology of the tested materials. In relation to stainless steel substrate, the PVD films present a superior resistance to sliding wear and cavitation erosion. Higher resistance was noticed for AlTiN than for TiAlN film, mainly due to its superior hardness and elastic modulus. Cavitation erosion mechanism of both, AlTiN and AlTiN coatings is prone to embrittlement, imputable to fatigue processes that result in coating rupture and spallation that consist in coating fragmentation, formation of pits and finally detachment from the substrate. Additionally, films nanoindentation results measured before and after cavitation testing indicate changes in coatings structure, that acknowledged wear mechanism that starts with coating internal delamination in flake spallation mode. In contrary to PVD coatings, steel substrate is characterized by developed cavitation erosion wear with roughened surface and plastically deformed, semi-brittle, eroded surface. Sliding wear of thin films is based on micro-ploughing mechanism. For stainless steel adhesive sliding wear mode and plastic deformation with smearing, material transfer and grooving were observed. It was confirmed that various fluid machinery components made from austenitic stainless steel that undergo cavitation erosion, can be prevented by deposition of AlTiN and TiAlN films.

scholarly journals Cavitation Erosion and Sliding Wear Mechanisms of AlTiN and TiAlN Films Deposited on Stainless Steel Substrate

Coatings ◽  
2019 ◽  
Vol 9 (5) ◽  
pp. 340 ◽  
Author(s):  
Mirosław Szala ◽  
Mariusz Walczak ◽  
Kamil Pasierbiewicz ◽  
Mariusz Kamiński
Keyword(s):  
Stainless Steel ◽  
Wear Mechanisms ◽  
Sliding Wear ◽  
Cavitation Erosion ◽  
Chemical Elements ◽  
Steel Substrate ◽  
Reference Sample ◽  
Scratch Test ◽  
Film Rupture ◽  
Columnar Grain

The resistance to cavitation erosion and sliding wear of stainless steel grade AISI 304 can be improved by using physical vapor deposited (PVD) coatings. The aim of this study was to investigate the cavitation erosion and sliding wear mechanisms of magnetron-sputtered AlTiN and TiAlN films deposited with different contents of chemical elements onto a stainless steel SS304 substrate. The surface morphology and structure of samples were examined by optical profilometry, light optical microscopy (LOM) and scanning electron microscopy (SEM-EDS). Mechanical properties (hardness, elastic modulus) were tested using a nanoindentation tester. Adhesion of the deposited coatings was determined by the scratch test and Rockwell adhesion tests. Cavitation erosion tests were performed according to ASTM G32 (vibratory apparatus) in compliance with the stationary specimen procedure. Sliding wear tests were conducted with the use of a nano-tribo tester, i.e., ball-on-disc apparatus. Results demonstrate that the cavitation erosion mechanism of the TiAlN and AlTiN coatings rely on embrittlement, which can be attributed to fatigue processes causing film rupture and internal decohesion in flake spallation, and thus leading to coating detachment and substrate exposition. At moderate loads, the sliding wear of thin films takes the form of grooving, micro-scratching, micro-ploughing and smearing of the columnar grain top hills. Compared to the SS reference sample, the PVD films exhibit superior resistance to sliding wear and cavitation erosion.

scholarly journals Cavitation erosion and sliding wear mechanisms of AlTiN and TiAlN films deposited on stainless steel substrate

2019 ◽  
Author(s):  
Mirosław Szala ◽  
Mariusz Walczak ◽  
Kamil Pasierbiewicz ◽  
Mariusz Kamiński
Keyword(s):  
Stainless Steel ◽  
Wear Mechanisms ◽  
Sliding Wear ◽  
Cavitation Erosion ◽  
Stainless Steel Substrate ◽  
Steel Substrate

scholarly journals Cavitation erosion and sliding wear resistance of HVOF coatings

2018 ◽  
Vol 90 (10) ◽  
Author(s):  
Mirosław Szala ◽  
Mariusz Walczak
Keyword(s):  
Stainless Steel ◽  
Wear Resistance ◽  
Sliding Wear ◽  
Cavitation Erosion ◽  
Steel Substrate ◽  
Reference Sample ◽  
Aisi 304 ◽  
Hvof Coatings ◽  
Cavitation Erosion Resistance ◽  
Sprayed Coatings

The aim of the work was to investigate the resistance to cavitation erosion and sliding wear of sprayed HVOF coatings. M(Ni,Co)CrAlY and Cr3C2-NiCr based coatings were deposited using HVOF method onto stainless steel substrate grade AISI 304. As-sprayed coatings’ surface morphology was examined by SEM-EDS and profilometer methods. Cavitationerosion tests were conducted in distilled water with the use of vibratory rig and stationary specimen method. Cavitation erosion curves were plotted as well as cavitational wear mechanism was observed with the use of SEM microscope. Sliding wear tests were performed using the ball-on-disc tribotester with counter-specimen (ball) made of steel 100Cr6. Wearrates and coefficient of friction were computed. Normalized wear resistance with referenceto stainless steel reference sample AISI 304 was calculated. In addition, comparable analysis of wear resistance results was conducted. M(Ni,Co)CrAlY coating presented the highest cavitation erosion resistance, therefore Cr3C2-NiCr coating represented the highest sliding wear resistance of all tested materials.

scholarly journals Cavitation Resistance of Elastomeric Coatings Deposited by Different Methods

2019 ◽  
Vol 56 (4) ◽  
pp. 875-881
Author(s):  
Costel-Relu Ciubotariu ◽  
Doina Frunzaverde
Keyword(s):  
Stainless Steel ◽  
Cavitation Erosion ◽  
Martensitic Stainless Steel ◽  
Stainless Steel Substrate ◽  
Steel Substrate ◽  
Cavitation Resistance ◽  
Deposition Method ◽  
Material Loss ◽  
Testing Period ◽  
Erosion Material

In this study a fluid elastomer was applied by two different methods on a martensitic stainless steel substrate, in order to obtain coatings for protection against cavitation. The investigations regarding the resistance to cavitation erosion of the elastomeric coatings were carried out by the indirect vibratory method using the values of the cumulative erosion (material loss) developed during a testing period of 600 minutes with a 20 kHz ultrasonic vibrator at a peak-to-peak amplitude of 50 μm. The experimental results obtained in the laboratory have been processed statistically. They clearly pointed out that the deposition method significantly influences the cavitation resistance of the elastomer.

Characterization of Diamond-Like Carbon Coating on 16Cr-1C Martensitic Stainless Steels

2009 ◽  
Vol 79-82 ◽  
pp. 627-630
Author(s):  
Hong Jen Lai ◽  
An Chun Liu ◽  
Yu Li Lin
Keyword(s):  
Stainless Steel ◽  
Elastic Modulus ◽  
Field Emission ◽  
Transition Layer ◽  
Layer Structure ◽  
Steel Substrate ◽  
Optical Microscope ◽  
Nanoindentation Test ◽  
Micro Hardness ◽  
Dlc Coating

The 16Cr-1C martensitic stainless steel can provide the higher hardness and better wear resistance for 440C steel. The microstructure of DLC coatings were observed by optical microscope and field-emission scanning electron microscope (FE-SEM). The compositional depth profile of DLC films were measured by field-emission Auger electron spectroscopy (Fe-AES). In addition, the micro-hardness and elastic modulus of DLC films were measured by nano-indentation tests. Experimental results show that the total thickness of coating was in the range of 600nm~1100nm. This coating was included of Ti/TiC transition layer and DLC layer. The Ti/TiC transition layer was grown on the 440C stainless steel substrate, and the upper layer was DLC layer. This layer structure was confirmed by the FE-AES analysis. The micro-hardness of DLC coating was measured in the range of 24.2GPa~26.0GPa, and the elastic modulus was measured in the range of 264GPa~313GPa in the nanoindentation test. The nanoscratch results show that DLC films have lower friction coefficients than 440C substrate.

Microstructure and Cavitation-Erosion Mechanism of Laser Cladding NiCrSiB Coating on CrNiMo Stainless Steel

2010 ◽  
Vol 154-155 ◽  
pp. 1788-1791 ◽  
Author(s):  
Xiao Bin Zhang ◽  
Xia Chang ◽  
Tao Wei ◽  
Chang Sheng Liu
Keyword(s):  
Stainless Steel ◽  
Laser Cladding ◽  
Cavitation Erosion ◽  
Stainless Steel Substrate ◽  
Steel Substrate ◽  
Strengthening Effect ◽  
Cladding Layer ◽  
Dense Microstructure ◽  
Micro Cracks ◽  
Precipitated Phases

A Ni-based alloy NiCrSiB laser cladding layer was made on the surface of CrNiMo stainless steel specimens using NiCrSiB powder. Cavitation erosion behavior of the laser cladding layer and the CrNiMo stainless steel was investigated by ultrasonic vibration cavitation erosion equipment The results shown that laser cladding layer has dense microstructure and has metallurgical combination with CrNiMo stainless steel substrate. Because of impact effect of cavities collapse, micro-cracks caused material broke off from samples. NiCrSiB laser cladding layer have better micro-crack propagate resistance property than CrNiMo stainless steel.Laser cladding layer has better cavitation resistance properties because of strengthening effect by precipitated phases such as M23[CB]6、CrB、CrSi、Fe2B、B4C and work hardening effect during cavitation erosion process.

Vibration based Energy Harvester Employing ZnO Film on the Stainless Steel Substrate

2013 ◽  
Vol 133 (4) ◽  
pp. 126-127 ◽  
Author(s):  
Shota Hosokawa ◽  
Motoaki Hara ◽  
Hiroyuki Oguchi ◽  
Hiroki Kuwano
Keyword(s):  
Stainless Steel ◽  
Energy Harvester ◽  
Stainless Steel Substrate ◽  
Steel Substrate ◽  
Zno Film

Wear behavior of laser cladded WC-FeAl coating on 321 stainless steel substrate

2020 ◽  
Vol 32 (4) ◽  
pp. 042015
Author(s):  
Alireza Mostajeran ◽  
Reza Shoja-Razavi ◽  
Morteza Hadi ◽  
Mohammad Erfanmanesh ◽  
Hadi Karimi
Keyword(s):  
Stainless Steel ◽  
Stainless Steel Substrate ◽  
Wear Behavior ◽  
Steel Substrate
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