Investigation of Fracture Performance and Interface Stress Behavior of Zn–Zn-Al Multilayer Coating–304 Stainless Steel Substrate System

2022 ◽  
Vol 34 (3) ◽  
Author(s):  
Hua Zhang ◽  
Si Han Zheng ◽  
Lei Yang ◽  
Chuan Jun Jin ◽  
Luo Yu Pan
Keyword(s):  
Stainless Steel ◽  
Stainless Steel Substrate ◽  
Steel Substrate ◽  
Multilayer Coating ◽  
Interface Stress ◽  
304 Stainless Steel ◽  
Stress Behavior ◽  
Fracture Performance

scholarly journals Effects of WC Particle Types on the Microstructures and Properties of WC-Reinforced Ni60 Composite Coatings Produced by Laser Cladding

Metals ◽  
2019 ◽  
Vol 9 (5) ◽  
pp. 583 ◽  
Author(s):  
Pengxian Zhang ◽  
Yibin Pang ◽  
Mingwei Yu
Keyword(s):  
Stainless Steel ◽  
Uniform Distribution ◽  
Laser Cladding ◽  
Steel Surface ◽  
Stainless Steel Substrate ◽  
Steel Substrate ◽  
Composite Coatings ◽  
304 Stainless Steel ◽  
Stainless Steel Surface ◽  
Different Types

WC-reinforced Ni60 composite coatings with different types of WC particles were prepared on 304 stainless steel surface by laser cladding. The influences of spherical WC, shaped WC, and flocculent WC on the microstructures and properties of composite coatings were investigated. The results showed that three types of WC particles distribute differently in the cladding coatings, with spherical WC particles stacking at the bottom, shaped WC aggregating at middle and lower parts, with flocculent WC particles dispersing homogeneously. The hardnesses, wear resistances, corrosion resistances, and thermal shock resistances of the coatings are significantly improved compared with the stainless steel substrate, regardless of the type of WC that is added, and especially with regard to the microhardness of the cladding coating; the addition of spherical or shaped WC particles can be up to 2000 HV0.05 in some areas. Flocculent WC, shaped WC, and spherical WC demonstrate large to small improvements in that order. From the results mentioned above, the addition of flocculent WC can produce a cladding coating with a uniform distribution of WC that is of higher quality compared with those from spherical WC and shaped WC.

Effect of Electrolytic/Chemical Pretreatment on Adhesion Strength of DLC Coatings on 304 Stainless Steel Substrate

2013 ◽  
Vol 771 ◽  
pp. 35-40 ◽  
Author(s):  
Yi Dong Jin ◽  
Chao Yin Nie ◽  
Chun Hua Ran ◽  
Wen Zhu ◽  
Yang Zhao ◽  
...  
Keyword(s):  
Stainless Steel ◽  
Adhesion Strength ◽  
Stainless Steel Substrate ◽  
Steel Substrate ◽  
304 Stainless Steel ◽  
Etching Time ◽  
Chemical Pretreatment ◽  
Dlc Coatings ◽  
The One ◽  
Better Than

To improve adhesion strength of DLC coatings on 304 stainless steel substrate,we studied substrate pretreatment by electrolytic/chemical etching methods.In this study,The DLC coatings were deposited on two groups of 304 stainless steel which had been electrolytically and chemically etched separately. The morphology of the coatings and substrate were characterized by SEM and metalloscope. The surface roughness of substrate was measured by roughness tester .The result shows that adhesion strength of DLC coatings on 304 stainless steel substrate is improved obviously due to mechanical interlock,surface adsorption and stress release.With prolonging the etching time,the adhesion strength of DLC coatings on the chemically etched substrate increase firstly and then decrease. The adhesion strength of DLC coatings on electrolytically etched substrate continuously increase. DLC coatings on electrolytically etched substrate perform better than the one on chemically etched substrate in adhesion.This is caused by the different surface morphology.

Stress corrosion and mechanical properties of zinc coating on 304 stainless steel

2021 ◽  
Vol 63 (3) ◽  
pp. 209-218
Author(s):  
Hua Zhang ◽  
Sihan Zheng ◽  
Yue Wang ◽  
QiLiang Li ◽  
Jie Tao ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Fracture Toughness ◽  
Stainless Steel ◽  
Stress Corrosion ◽  
Stainless Steel Substrate ◽  
Steel Substrate ◽  
Zinc Coating ◽  
304 Stainless Steel ◽  
Three Point Bending ◽  
Indentation Tests

Abstract The effect of stress corrosion on the mechanical properties of the coating in the zinc coating/304 stainless steel substrate system was investigated by three-point bending, slow strain rate tensile (SSRT) and nano-indentation tests. Studies have shown that fracture toughness was improved when the coating was thick but weakened when the coating was thin. At varied coating thicknesses (80 μm, 160 μm, 240 μm, 320 μm, 400 μm), the decline rates of the fracture toughness were 77.48 %, 71.82 %, 66.67 %, 55.48 % and 51.52 %, respectively, and those for the critical strain of crack initiation were 94.97 %, 91.88 %, 88.42 %, 76.19 % and 74.33 %, respectively. In addition, simulations were made to analyze the crack propagation of zinc coating in coating/substrate system under tensile loading by ABAQUS, which proved the accuracy of the experiment.

Photocatalytic and Antibacterial Properties of TiO2 Composite Thin Films Coated on 304 Stainless Steel Substrate Synthesized at Low Temperature

2011 ◽  
Vol 214 ◽  
pp. 444-449
Author(s):  
Natthapong Muangtrairat ◽  
Vishnu Rachpech ◽  
Lek Sikong
Keyword(s):  
Thin Films ◽  
Stainless Steel ◽  
Low Temperature ◽  
Uv Irradiation ◽  
Stainless Steel Substrate ◽  
Steel Substrate ◽  
Antibacterial Properties ◽  
304 Stainless Steel ◽  
Photocatalytic Reaction ◽  
Composite Thin Films

This paper describes the photoactive and antibacterial properties of TiO2, Fe3+/TiO2 and N/TiO2 thin films on 304 stainless steel substrate that prepared by a sol-gel and dip coating methods. Anatase phase crystalline together with an amorphous phase was formed after refluxed at 100W for 2h using a domestic microwave oven followed by oven heating in low temperature range 100-250°C for 1 h. The adhesion between thin film and stainless steel substrate is strong and films thickness observed by SEM were about 700~1000 nm. FT-IR spectra of as-prepared TiO2 powders reveal hydroxyl radical on TiO2 surfaces, leading to promotion of photocatalytic reaction of the films. Photocatalytic activity was determined by means of degradation of methylene blue solution under UV irradiation and antibacterial efficiency was evaluated by inactivation of E.coli. The photocatalytic reaction rate can be expressed as an exponential equation. TiO2 and TiO2 composite thin films exhibited high photoactive and antibacterial properties under UV irradiation comparing to control. E.coli was killed about 80% and 95% during treatment with UV for 1 and 3 h, respectively.

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