An Archaeological Analogue for a Composite Material of Carbon Steel, Copper and Magnetite

2009 ◽  
Vol 46 (8) ◽  
pp. 377-393
Author(s):  
Jorge Chamón ◽  
Christian Dietz ◽  
Laura García ◽  
Raquel Arévalo ◽  
Esther Bravo ◽  
...  
2017 ◽  
Vol 7 ◽  
pp. 529-534 ◽  
Author(s):  
Wenning Shen ◽  
Lajun Feng ◽  
Hui Feng ◽  
Ying Cao ◽  
Lei Liu ◽  
...  

2020 ◽  
Vol 861 ◽  
pp. 202-212
Author(s):  
Ariel Verzosa Melendres ◽  
Mel Bryan L. Espenilla ◽  
Araceli M. Monsada ◽  
Rolan Pepito Vera Cruz

The property of superabsorbent polymer (SAP) was investigated as component of composite material for corrosion control application. The composite material is a multilayer coating consisting of SAP particles, epoxy and hardener. The absorption property of SAP at different concentrations of sodium chloride was measured. It included 3% NaCl concentration, which represent the concentration of salt in sea water, an environment which is corrosive to carbon steel. Results showed decreasing absorbency of SAP at increasing concentration of sodium chloride. Predetermined amount of SAP and epoxy were mixed to obtain a homogenous mixture after which the hardener was added and mixed homogenously to form the composite material’s main component. The composite material was studied for absorption properties in an HDPLE substrate and then later applied onto a carbon steel specimen of size 40 mm x 100 cm and thickness of 0.70 mm using paint brush forming a film on the carbon steel surface. After curing, the film was scratched with a definite length using a sharp knife. Immediately, the samples were exposed to cyclic immersion in 3% sodium chloride solution and subsequent drying to run the corrosion test. Results showed that the composite material was able to control corrosion on the surface of the carbon steel which could be attributed to its self-healing property.


Author(s):  
A. Trudov ◽  
V. Arisova ◽  
L. Gurevich ◽  
A. Birshbaeva

The results of studies of structural changes in a two-layer explosion-welded composite material are presented: carbon steel 20 + alloyed stainless steel 50Cr15Мo2V after normalization at temperatures of 800 - 1100 С and holding time 1 hour. It was found that at 800 ° C there is a “reverse” diffusion of carbon - from its lower to higher concentrations and the formation of a decarburized layer in steel 20, and with increasing temperature, carbon diffuses back into steel 20 together with chromium, changing the structure of the heat-affected zone: with an increase in the amount of perlite , the formation of the structure of Widmannstätt and carbide colonies in steel 20 and the formation of martensite in steel 50Cr15Мo2V. The features of structural changes in the alloys that were formed after explosion welding are considered.


Author(s):  
A. F. Trudov ◽  
V. N. Arisova ◽  
L. M. Gurevich ◽  
A. E. Birshbaeva ◽  
V. O. Kharlamov

The results of studying the diffusion of alloying elements of stainless steel 50Cr15Мo2V of a two-layer composite material at the interface with carbon steel 20 after explosion welding and subsequent heat treatment are presented. The absence of significant diffusion of chromium from alloyed to low-carbon steel has been established.


Author(s):  
E. I. Marukovich ◽  
S. M. Usherenko ◽  
Javad Yazdani-Cherati ◽  
Yu. S. Usherenko

Experimental estimates of the strength properties of a composite material based on carbon steel 45, created by piercing matrix steel in the mode of superdeep penetration by streams of powder particles, have been performed. Pulsed dynamic action by streams of powder particles and subsequent heat treatment converts steel into a fiber composite material.


For an IC Engine, Crankshaft is one of the most important component. It basically converts the reciprocating motion of the piston into rotating motion with the aid of connecting rod which connect piston to crankshaft. Crankshaft is mounted on number of main bearings and a flywheel at one end, which is further connected to clutch and transmission. Current automotive IC engine crankshafts are made of carbon steel alloys, contains of iron and small percentage of carbon (0.25%-0.45%) along with combination of several alloying elements. In this project, a composite material called Kevlar epoxy is suggested for crankshaft. Crankshaft is designed using standard design procedure and modeling is done using SOLIDWORKS. Analysis is performed on the crankshaft made of carbon steel and composite material using analysis software called ANSYS WORKBENCH. Comparison of deformation, stresses and strains is done between crankshaft made of carbon steel and composite material, Kevlar epoxy. Considering the optimum results, crankshaft is fabricated.The aspect of this project is to optimize the weight of the crankshaft. The objective of improving engine performance, reducing initial loads and fuel economy can be achieved by reducing the weight of the crankshaft by using composite material, Kevlar epoxy. It is logical that during its large volume production, reduction of weight of crankshaft will result in large savings.


Author(s):  
Y. L. Chen ◽  
J. R. Bradley

Considerable effort has been directed toward an improved understanding of the production of the strong and stiff ∼ 1-20 μm diameter pyrolytic carbon fibers of the type reported by Koyama and, more recently, by Tibbetts. These macroscopic fibers are produced when pyrolytic carbon filaments (∼ 0.1 μm or less in diameter) are thickened by deposition of carbon during thermal decomposition of hydrocarbon gases. Each such precursor filament normally lengthens in association with an attached catalyst particle. The subject of filamentous carbon formation and much of the work on characterization of the catalyst particles have been reviewed thoroughly by Baker and Harris. However, identification of the catalyst particles remains a problem of continuing interest. The purpose of this work was to characterize the microstructure of the pyrolytic carbon filaments and the catalyst particles formed inside stainless steel and plain carbon steel tubes. For the present study, natural gas (∼; 97 % methane) was passed through type 304 stainless steel and SAE 1020 plain carbon steel tubes at 1240°K.


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