FATIGUE RESISTANCE OF A MEDIUM CARBON STEEL WITH A WEAR RESISTANT THERMAL SPRAY COATING

1994 ◽  
Vol 17 (5) ◽  
pp. 563-570 ◽  
Author(s):  
A. A. Rakitsky ◽  
E. R. Rios ◽  
K. J. Miller
Keyword(s):  
Carbon Steel ◽  
Thermal Spray ◽  
Fatigue Resistance ◽  
Spray Coating ◽  
Thermal Spray Coating ◽  
Medium Carbon Steel ◽  
Medium Carbon ◽  
Wear Resistant

scholarly journals Laser Effect on Fatique Resistance of Carbon Steel

2011 ◽  
Vol 8 (1) ◽  
pp. 44-47
Author(s):  
Baghdad Science Journal
Keyword(s):  
Mechanical Properties ◽  
Carbon Steel ◽  
Laser Beam ◽  
Fatigue Resistance ◽  
Wave Length ◽  
Medium Carbon Steel ◽  
Medium Carbon ◽  
Laser Effect ◽  
Neodymium Yag Laser ◽  
Scanning Electron

Laser beam has been widely used to improve the mechanical properties of the metals. It used for cutting, drilling, hardening, welding……etc. The use of Laser beam has many features in accuracy and speeding in work, also in the treatment of metals locally, and in the places that is hard to reach by traditional ways. In this research a surface treatment was done to medium carbon steel (0.4%C) which is common kind of steel that is used in industry. Pulsing Neodymium -YAG Laser has been used and 1.06 micrometer wave length and 5 msec and the distance is about 30 centimeter between the exit area of the Laser beam from the system and the piece that treated . We are going to check the fatigue resistance for samples that is treated by Laser beam and Scanning Electron Microscope (SEM) and also we made check for the microstructure by using the light microscope and the SEM for the breaking samples. The results of checking showed that there is an improvement in the fatigue resistance after the treatment by the Laser beam. The results of microscope checking showed that the beginning of the failure is from the surface area and there is more than one level of the break.

scholarly journals Biofilm Formation Plays a Crucial Rule in the Initial Step of Carbon Steel Corrosion in Air and Water Environments

Materials ◽  
2020 ◽  
Vol 13 (4) ◽  
pp. 923 ◽  
Author(s):  
Akiko Ogawa ◽  
Keito Takakura ◽  
Nobumitsu Hirai ◽  
Hideyuki Kanematsu ◽  
Daisuke Kuroda ◽  
...  
Keyword(s):  
Carbon Steel ◽  
Thermal Spray ◽  
Biofilm Formation ◽  
Zinc Coating ◽  
Electrochemical Corrosion ◽  
Spray Coating ◽  
Steel Corrosion ◽  
Thermal Spray Coating ◽  
Iron Corrosion ◽  
Microbially Influenced Corrosion

In this study, we examined the relationship between the effect of a zinc coating on protecting carbon steel against biofilm formation in both air and water environments. SS400 carbon steel coupons were covered with a zinc thermal spray coating or copper thermal spray coating. Coated coupons were exposed to either air or water conditions. Following exposure, the surface conditions of each coupon were observed using optical microscopy, and quantitatively analyzed using an x-ray fluorescence analyzer. Debris on the surface of the coupons was used for biofilm analysis including crystal violet staining for quantification, Raman spectroscopic analysis for qualification, and microbiome analysis. The results showed that the zinc thermal spray coating significantly inhibited iron corrosion as well as biofilm formation in both air and water environments. The copper thermal spray coating, however, accelerated iron corrosion in both air and water environments, but accelerated biofilm formation only in a water environment. microbially-influenced-corrosion-related bacteria were barely detected on any coupons, whereas biofilms were detected on all coupons. To summarize these results, electrochemical corrosion is dominant in an air environment and microbially influenced corrosion is strongly involved in water corrosion. Additionally, biofilm formation plays a crucial rule in carbon steel corrosion in both air and water, even though microbially-influenced-corrosion-related bacteria are barely involved in this corrosion.

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