Analysis and modeling of surface characteristics in electrophoretic deposition–assisted internal polishing of AISI 304 steel

2019 ◽  
Vol 104 (5-8) ◽  
pp. 3083-3094
Author(s):  
Nikhil V. Khatekar ◽  
Raju S. Pawade
Keyword(s):  
Electrophoretic Deposition ◽  
Surface Characteristics ◽  
Aisi 304 ◽  
Aisi 304 Steel

scholarly journals Surface Texture after Turning for Various Workpiece Rigidities

Machines ◽  
2021 ◽  
Vol 9 (1) ◽  
pp. 9
Author(s):  
Michal Dobrzynski ◽  
Karolina Mietka
Keyword(s):  
Surface Texture ◽  
Surface Characteristics ◽  
304 Stainless Steel ◽  
Aisi 304 ◽  
Aisi 304 Steel ◽  
Surface Irregularities ◽  
Surface Microgeometry ◽  
Surface Profiles ◽  
Turned Parts ◽  
Positive Effect

In the paper, we present an analysis of the surface texture of turned parts with L/D (length/diameter) ratios of 6 and 12 and various rigidity values. The studies were carried out on samples made of S355JR steel and AISI 304 stainless steel. A detailed analysis of 2D surface profiles was carried out by using a large number of parameters that allowed us to distinguish significant differences in the surface microgeometry, which confirmed that determining surface characteristics from one height parameter (Ra—arithmetical mean height) is far from sufficient. The obtained results indicate significantly better roughness and waviness values of the AISI 304 steel surfaces in terms of its size, periodicity, and regularity. Therefore, the turning process of AISI 304 shafts with low rigidity allows one to be able to achieve better quality texture and have a positive effect on the general properties of a workpiece. In all tested samples, surface irregularities decreased along with the distance from the tailstock. The shafts with an L/D ratio of 12 had worse surfaces in the first two sections due to lower rigidity. The results received close to the three-jaw chuck, regardless of the L/D ratio and material type, demonstrated similar waviness and roughness parameters and profiles.

Optimization of Cutting Parameters Considering Surface Roughness When Milling AISI 304 Steel Using Coated Wc-Co and Tialn / Wc-Co Coated

2019 ◽  
Author(s):  
Murilo Pereira Lopes ◽  
Jose Rubens Gonçalves Carneiro ◽  
Gilmar Cordeiro da Silva ◽  
Carlos Eduardo Santos ◽  
Ítalo Bruno dos Santos
Keyword(s):  
Surface Roughness ◽  
Cutting Parameters ◽  
Aisi 304 ◽  
Aisi 304 Steel ◽  
Optimization Of Cutting Parameters

scholarly journals Biofilm inhibition and bactericidal activity of NiTi alloy coated with graphene oxide/silver nanoparticles via electrophoretic deposition

2021 ◽  
Vol 11 (1) ◽  
Author(s):  
Sirapat Pipattanachat ◽  
Jiaqian Qin ◽  
Dinesh Rokaya ◽  
Panida Thanyasrisung ◽  
Viritpon Srimaneepong
Keyword(s):  
Surface Roughness ◽  
Silver Nanoparticles ◽  
Graphene Oxide ◽  
Electrophoretic Deposition ◽  
Biofilm Formation ◽  
Niti Alloy ◽  
Surface Characteristics ◽  
Dependent Manner ◽  
Biofilm Inhibition ◽  
Coating Time

AbstractBiofilm formation on medical devices can induce complications. Graphene oxide/silver nanoparticles (GO/AgNPs) coated nickel-titanium (NiTi) alloy has been successfully produced. Therefore, the aim of this study was to determine the anti-bacterial and anti-biofilm effects of a GO/AgNPs coated NiTi alloy prepared by Electrophoretic deposition (EPD). GO/AgNPs were coated on NiTi alloy using various coating times. The surface characteristics of the coated NiTi alloy substrates were investigated and its anti-biofilm and anti-bacterial effect on Streptococcus mutans biofilm were determined by measuring the biofilm mass and the number of viable cells using a crystal violet assay and colony counting assay, respectively. The results showed that although the surface roughness increased in a coating time-dependent manner, there was no positive correlation between the surface roughness and the total biofilm mass. However, increased GO/AgNPs deposition produced by the increased coating time significantly reduced the number of viable bacteria in the biofilm (p < 0.05). Therefore, the GO/AgNPs on NiTi alloy have an antibacterial effect on the S. mutans biofilm. However, the increased surface roughness does not influence total biofilm mass formation (p = 0.993). Modifying the NiTi alloy surface using GO/AgNPs can be a promising coating to reduce the consequences of biofilm formation.

scholarly journals Study on the Influence of the Ball Material on Abrasive Particles’ Dynamics in Ball-Cratering Thin Coatings Wear Tests

Materials ◽  
2021 ◽  
Vol 14 (3) ◽  
pp. 668
Author(s):  
Gustavo Pinto ◽  
Andresa Baptista ◽  
Francisco Silva ◽  
Jacobo Porteiro ◽  
José Míguez ◽  
...  
Keyword(s):  
Aisi 304 ◽  
Thin Coatings ◽  
Iron And Steel ◽  
Test Configuration ◽  
Abrasive Particles ◽  
Aisi 52100 ◽  
Aisi 304 Steel ◽  
Aisi 52100 Steel ◽  
Steel Balls ◽  
Particles Dynamics

Micro-abrasion remains a test configuration hugely used, mainly for thin coatings. Several studies have been carried out investigating the parameters around this configuration. Recently, a new study was launched studying the behavior of different ball materials in abrasive particles’ dynamics in the contact area. This study intends to extend that study, investigating new ball materials never used so far in this test configuration. Thus, commercial balls of American Iron and Steel Institute (AISI) 52100 steel, Stainless Steel (SS) (AISI) 304 steel and Polytetrafluoroethylene (PTFE) were used under different test conditions and abrasive particles, using always the same coating for reference. Craters generated on the coated samples’ surface and tracks on the balls’ surface were carefully observed by Scanning Electron Microscopy (SEM) and 3D microscopy in order to understand the abrasive particles’ dynamics. As a softer material, more abrasive particles were entrapped on the PTFE ball’s surface, generating grooving wear on the samples. SS AISI 304 balls, being softer than the abrasive particles (diamond), also allowed particle entrapment, originating from grooving wear. AISI 52100 steel balls presented particle dynamics that are already known. Thus, this study extends the knowledge already existing, allowing to better select the ball material to be used in ball-cratering tests.

scholarly journals Influence of Polyurea Composite Coating on Selected Mechanical Properties of AISI 304 Steel

Materials ◽  
2019 ◽  
Vol 12 (19) ◽  
pp. 3137 ◽  
Author(s):  
Monika Duda ◽  
Joanna Pach ◽  
Grzegorz Lesiuk
Keyword(s):  
Mechanical Properties ◽  
Epoxy Resin ◽  
Composite Coating ◽  
Composite Coatings ◽  
Glass Fabric ◽  
Coated Sample ◽  
Hemp Fiber ◽  
Aisi 304 ◽  
Aisi 304 Steel ◽  
The Impact

This paper contains experimental results of mechanical testing of the AISI 304 steel with composite coatings. The main goal was to investigate the impact of the applied polyurea composite coating on selected mechanical properties: Adhesion, impact resistance, static behavior, and, finally, fatigue lifetime of notched specimens. In the paper the following configurations of coatings were tested: EP (epoxy resin), EP_GF (epoxy resin + glass fabric), EP_GF_HF (epoxy resin + glass fabric hemp fiber), EP_PUA (epoxy resin + polyurea) resin, EP_GF_PUA (epoxy resin + glass fabric + polyurea) resin, and EP_GF_HF_PUA (epoxy resin + glass fabric + hemp fiber + polyurea) resin. The highest value of force required to break adhesive bonds was observed for the EP_PUA coating, the smallest for the single EP coating. A tendency of polyurea to increase the adhesion of the coating to the base was noticed. The largest area of delamination during the impact test was observed for the EP_GF_HF coating and the smallest for the EP-coated sample. In all tested samples, observed delamination damage during the pull-off test was located between the coating and the metallic base of the sample.

scholarly journals TECHNOLOGINIŲ PARAMETRŲ ĮTAKOS VIRINTINĖS JUNGTIES SAVYBĖMS TYRIMAI, SUVIRINANT AISI 304 PLIENĄ / RESEARCH OF THE TECHNOLOGICAL PARAMETERS INFLUENCE ON THE WELD PROPERTIES OF WELDED STEEL AISI 304

2019 ◽  
Vol 11 (0) ◽  
pp. 1-4
Author(s):  
Mantvydas Sereika ◽  
Valentinas Varnauskas ◽  
Irmantas Gedzevičius
Keyword(s):  
Finite Element ◽  
Welded Joints ◽  
Visual Inspection ◽  
Hardness Testing ◽  
Technological Parameters ◽  
Welded Steel ◽  
Aisi 304 ◽  
Aisi 304 Steel ◽  
Weld Properties ◽  
Steel Aisi

The article analyzes the influence of technological parameters on the properties of welded joints by welding AISI 304 steel. In order to get the results was carried out computer modeling with the finite element modeling program ANSYS, welded samples performed visual inspection, hardness testing to make a seam. Results of the study are presented in tabular and graphic representation, the conclusions.

Finishing and Hardening of a Flat Surface Ring Area of a Workpiece by Rotary Burnishing

2017 ◽  
Vol 743 ◽  
pp. 245-247
Author(s):  
Victor P. Kuznetsov ◽  
Vladimir V. Voropaev ◽  
Andrei S. Skorobogatov
Keyword(s):  
Surface Layer ◽  
Feed Rate ◽  
Steel Surface ◽  
Flat Surface ◽  
Elementary Volume ◽  
Aisi 304 ◽  
Layer Material ◽  
Hardening Process ◽  
Aisi 304 Steel ◽  
Smoothing Process

This work researches a smoothing process of original micro-profile and hardening process of AISI 304 steel surface layer material while performing rotary burnishing of the flat surface ring area. The paper establishes the interrelation between the number of indenter impacts and elementary volume of the material with a roughness and microhardness of the surface layer. The minimum roughness Ra=30 … 45 nanometers and the maximum microhardness of 425 … 475 HV0.25 is reached with the feed rate of 0.05 mm/rev and impact multiplicity of 70 … 100.

Sign in / Sign up

Export Citation Format

Share Document