Fretting wear behaviour of 2Cr13 stainless steel before and after laser treatment

This research investigates and analyzes wear properties of 316 stainless steel before and after applying paste boronizing process and to investigate the effect of shot blasting process in enhancing boron dispersion into the steel. In order to enhance the boron dispersion into 316 stainless steel, surface deformation method by shot blasting process was deployed. Boronizing treatment was conducted using paste medium for 8 hours under two different temperatures which were 8500C and 9500C. Wear behaviour was evaluated using pin-on-disc test for abrasion properties. The analysis on microstructure, X-ray Diffraction (XRD) and density were also carried out before and after applying boronizing treatment. Boronizing process that had been carried out on 316 stainless steel increases the wear resistance of the steel compared to the unboronized 316 stainless steel. The effect of boronizing treatment together with the shot blasting process give a greater impact in increasing the wear resistance of 316 stainless steel. This is mainly because shot blasted samples initiated surface deformation that helped more boron dispersion due to dislocation of atom on the deformed surface. Increasing the boronizing temperature also increases the wear resistance of 316 stainless steel. In industrial application, the usage of the components that have been fabricated using the improved 316 stainless steel can be maximized because repair and replacement of the components can be reduced as a result of improved wear resistance of the 316 stainless steel.

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Paper 22: Control of Fretting Wear of Sintered Aluminium Powder

Proceedings of the Institution of Mechanical Engineers Conference Proceedings ◽

10.1243/pime_conf_1966_181_297_02 ◽

1966 ◽

Vol 181 (15) ◽

pp. 41-47

Author(s):

C. P. L. Commissaris ◽

A. W. J. de Gee

Keyword(s):

Stainless Steel ◽

Nuclear Reactor ◽

Construction Materials ◽

Fretting Wear ◽

Wear Behaviour ◽

Research Attention ◽

Aluminium Powder ◽

Bearing Materials ◽

Plasma Sprayed ◽

Fretting Damage

For the development of a new type of nuclear reactor to be built with light metals (Al, Zr, Be, Mg) as the main construction materials, equipment was designed for the study of wear under fretting conditions. With this equipment experiments can be performed in various gaseous and liquid environments, including the organic coolant terphenyl at temperatures up to 450°C. Two different vibrational motions can be applied: a torsional vibration in the plane of contact (pure fretting), and a vibration normal to the plane of contact (hammering motion). In the first phase of research attention was focused primarily on the wear behaviour of sintered aluminium powder (SAP). It was found that the wear of SAP against SAP, SAP against stainless steel, SAP against zirconium, and SAP against beryllium, strongly exceeds that of stainless steel against stainless steel, zirconium against zirconium, and beryllium against beryllium. Nevertheless, it was found possible to protect the SAP completely against fretting damage by using carbon-based bearing materials as mating components, or by coating the contacting surface with a plasma sprayed layer of antimony-tellurium alloy. After 400 h vibrating at 50 c/s in terphenyl of 400°C against a relevant layer, the SAP specimens proved to be virtually unattacked. Quantitative data on the wear of the sprayed layer itself are also presented. The wear rate of this layer is so small that application in practice can be seriously considered.

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Novel Electro Polymerization Method to Synthesized Anti-corrosion Coated Layer on Stainless Steel Surface from (N-Benzothiazolyl Maleamic Acid) and Study its Biological Activity

International Journal of Pharmaceutical Quality Assurance ◽

10.25258/ijpqa.v9i3.13656 ◽

2018 ◽

Vol 9 (3) ◽

Author(s):

Muna I Khalaf ◽

Khulood A Saleh ◽

Khalil S Khalil

Keyword(s):

Stainless Steel ◽

Chemical Structure ◽

Inhibition Efficiency ◽

Steel Plate ◽

Polymeric Coating ◽

Stainless Steel Surface ◽

Plate Electrode ◽

Before And After ◽

Maleamic Acid ◽

Polymerization Method

Electro polymerization of N-benzothiazolyl maleamic acid (NBM) was carried out on stainless steel plate electrode in a protic medium of monomer aqueous solution using electrochemical oxidation procedure in electrochemical cell.Spectroscopic characterization techniques were investigated to obtain information about the chemical structure of polymer. The anti-corrosion action of polymer was investigated on stainless steel by electrochemical polarization method. In addition, the effect of adding nanomaterial (TiO2, ZnO (bulk-nano)) to monomer solution on the corrosion behavior of stainless steel was investigated. The results obtained showed that the corrosion rate of S-steel increased with temperature increase from 293K to 323K and the values of inhibition efficiency by coating polymer increase with nanomaterial addition. Apparent energies of activation have been calculated for the corrosion process of S-steel in acidic medium before and after polymeric coating. Furthermore were studied the effect of the preparing polymer on some strain of bacteria.

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Laser-treatment-induced morphology and structure modifications of stainless steel: Element segregations and phase evolutions

Materials Chemistry and Physics ◽

10.1016/j.matchemphys.2021.124570 ◽

2021 ◽

pp. 124570

Author(s):

Hongfei Liu ◽

Yuefan Wei ◽

Chee Kiang Ivan Tan ◽

Suo Hon Lim ◽

Lei Zhang

Keyword(s):

Stainless Steel ◽

Laser Treatment ◽

Morphology And Structure

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Wear behaviour of nitrogen implanted stainless steel

Nuclear Instruments and Methods in Physics Research Section B Beam Interactions with Materials and Atoms ◽

10.1016/0168-583x(87)90914-1 ◽

1987 ◽

Vol 21 (1-4) ◽

pp. 591-594 ◽

Cited By ~ 3

Author(s):

Sadhna Shrivastava ◽

Amitabh Jain ◽

A. Sethuramiah ◽

V.D. Vankar ◽

K.L. Chopra

Keyword(s):

Stainless Steel ◽

Wear Behaviour

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Scientific validation of three-dimensional stereophotogrammetry compared to the IGAIS clinical scale for assessing wrinkles and scars after laser treatment

Scientific Reports ◽

10.1038/s41598-021-91922-9 ◽

2021 ◽

Vol 11 (1) ◽

Author(s):

Barbara Helena Barcaro Machado ◽

Ivy Dantas De Melo E. Silva ◽

Walter Marou Pautrat ◽

James Frame ◽

Mohammad Najlah

Keyword(s):

Laser Treatment ◽

Three Dimensional ◽

Skin Surface ◽

Clinical Scale ◽

3D Images ◽

Laser Resurfacing ◽

Before And After ◽

Measuring Outcomes ◽

Skin Scar ◽

Scientific Validation

AbstractMeasuring outcomes from treatments to the skin is either reliant upon patient’s subjective feedback or scale-based peer assessments. Three-Dimensional stereophotogrammetry intend to accurately quantify skin microtopography before and after treatments. The objective of this study is comparing the accuracy of stereophotogrammetry with a scale-based peer evaluation in assessing topographical changes to skin surface following laser treatment. A 3D stereophotogrammetry system photographed skin surface of 48 patients with facial wrinkles or scars before and three months after laser resurfacing, followed immediately by topical application of vitamin C. The software measured changes in skin roughness, wrinkle depth and scar volume. Images were presented to three observers, each independently scoring cutaneous improvement according to Investigator Global Aesthetic Improvement Scale (IGAIS). As for the results, a trend reflecting skin/scar improvement was reported by 3D SPM measurements and raters. The percentage of topographical change given by the raters matched 3D SPM findings. Agreement was highest when observers analysed 3D images. However, observers overestimated skin improvement in a nontreatment control whilst 3D SPM was precise in detecting absence of intervention. This study confirmed a direct correlation between the IGAIS clinical scale and 3D SPM and confirmed the efficacy and accuracy of the latter when assessing cutaneous microtopography alterations as a response to laser treatment.

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