scholarly journals Fractographic analysis of the destruction composite coatings after bending tests

2019 ◽  
pp. 15-19
Author(s):  
T.A. Krylova ◽  
◽  
Y.A. Chumakov ◽  
E.V. Domarov ◽  
A.I. Korchagin ◽  
...  
Keyword(s):  
Composite Coatings ◽  
Fractographic Analysis ◽  
Bending Tests

Mechanical Behavior for some Cobalt Alloys

2015 ◽  
Vol 1114 ◽  
pp. 9-12
Author(s):  
Alexandru Ghiban ◽  
Brandusa Ghiban ◽  
Cristina Maria Borţun ◽  
Nicolae Serban ◽  
Mihai Buzatu
Keyword(s):  
Tensile Strength ◽  
Chemical Composition ◽  
Mechanical Behavior ◽  
Mechanical Characteristics ◽  
Fractographic Analysis ◽  
Cobalt Alloys ◽  
Dental Alloys ◽  
Bending Tests ◽  
Longitudinal Modulus

Four compositions of some usually commercial dental alloys were investigated in order to determine the mechanical characteristics and fractographic analysis of tensile and bending tests surfaces. A correlation between chemical composition (either molybdenum or molybdenum and chromium contents) and mechanical characteristics (longitudinal modulus, tensile strength and elongation) were finally done.

scholarly journals The Spread of Corrosion in Cast Iron and its Effect on the Life Cycle of Transportation Vehicles

2017 ◽  
Vol 65 (2) ◽  
pp. 383-389 ◽  
Author(s):  
Tomáš Binar ◽  
Jiří Švarc ◽  
Petr Dostál ◽  
Michal Šustr ◽  
Jan Tippner
Keyword(s):  
Impact Strength ◽  
Fractographic Analysis ◽  
Bending Test ◽  
Material Surface ◽  
Bending Tests ◽  
Corrosion Tests ◽  
Fracture Surfaces ◽  
Impact Bending ◽  
Notch Impact Strength ◽  
The Impact

This article deals with the spread of corrosion in material at different exposure times, and its effect on the measured brittle fracture and notch impact strength under different temperature conditions. To assess the degradational effect of corrosion on the material characteristics represented by the measured impact strength, we conducted a fractographic analysis of fracture surfaces, the aim of which was to evaluate the spread of corrosion in the material. In the first part of the experiment, two corrosion tests are simulated with a duration time of 432 and 648 hours, to compare the degradation effect of corrosion on the notch impact strength, depending on the duration of the corrosion tests. The following part shows the results of the impact bending test, where the experiment was conducted in an area of reduced and increased temperatures. The final part summarizes the results of the fractographic analysis of sample fracture surfaces from the impact bending tests. Based on the measured the length of the corrosion cracks, we analyzed the sample at the notch and from the material surface after the impact bending test.

Fractographic Study of Destruction of Composite Coatings After Bending Tests

2020 ◽  
Vol 62 (9) ◽  
pp. 1552-1557 ◽  
Author(s):  
T. A. Krylova ◽  
Yu. A. Chumakov ◽  
E. V. Domarov ◽  
A. I. Korchagin
Keyword(s):  
Composite Coatings ◽  
Bending Tests ◽  
Fractographic Study

Flexible epoxy composite coatings modified by reactive rubber with improvements in water and corrosive resistances

2019 ◽  
Vol 40 (1) ◽  
pp. 57-66
Author(s):  
Jinwei Wang ◽  
Xiangming Guo ◽  
Di Wu
Keyword(s):  
Cross Section ◽  
Slow Rate ◽  
Electrochemical Impedance ◽  
Epoxy Composite ◽  
Composite Coatings ◽  
Negative Effects ◽  
Good Resistance ◽  
Corrosive Media ◽  
Phase Separations ◽  
Bending Tests

Abstract Epoxy composites were modified by reactive polybutadiene, and their resistance to T-bend and liquid permeation was evaluated to develop flexible epoxy composite coatings with good resistance to corrosive media. The composites’ resistance to bending on galvanic sheets was improved with the addition of up to around 15 wt.% amino liquid polybutadiene (ALPB) as reflected by the cross-section images after bending tests and bending times at break. The initial impedance increased with the addition of up to 15 wt.% ALPB in the composites, whereas the resistance reduced in a much slow rate with immersion time for the sample containing ALPB at around 10 wt.%. This result suggested that their resisting ability depended on the amount and dispersion of ALPB. The Rc and Cc parameters from the electrochemical impedance spectroscopy measurements revealed that the improvement in resistance to electrolyte resulted from the compactness increment at certain range of ALPB additions, which was also supported by their water uptake trends. Moreover, the addition of ALPB above 20% resulted in severe aggregations and phase separations. The resulting reduced compactness reflects the fact that the excessive reactive rubber addition leads to the negative effects on their resisting ability upon both T-bend and liquid permeation.

Electrodeposition and Characterization of Cr-Fe-ZrO2 Composite Coating from Trivalent Chromium Chloride Electrolyte

2011 ◽  
Vol 239-242 ◽  
pp. 3056-3061 ◽  
Author(s):  
Xiang Zhu He ◽  
Xin Li Zhou ◽  
Lin Yuan Huang
Keyword(s):  
Composite Coating ◽  
Composite Coatings ◽  
Trivalent Chromium ◽  
Complexing Agent ◽  
Bending Tests ◽  
Chromium Chloride ◽  
Chloride Electrolyte ◽  
Appearance Quality ◽  
Nano Size

Cr-Fe-ZrO2composite coatings were electrodeposited in trivalent chromium chloride electrolyte containing glycine as complexing agent. The effects of electrodeposition parameters such as current density and electroplating time on appearance, surface morphology and composition of the Cr-Fe-ZrO2composite coatings were investigated mainly. The obtained Cr-Fe-ZrO2composite coatings were characterized by means of scanning electron microscope (SEM) and energy disperse spectroscopy (EDS) techniques; the appearance quality was evaluated by range estimation; and the bonding force was analyzed by bending tests. The SEM results showed that the nano-size ZrO2powder were fairly distributed through out in the composite coating, and the composite coating contained only few fine cracks. The EDS results indicated that the composite coating contained chromium, iron, zirconium, oxygen, carbon and chlorine. The deposited coating was glossy and the results of bending tests showed that the bonding between the composite coating and the substrate was good

Microwave Absorbing Properties of Carbon Fibers Modified with BN/SiC Composite Coatings

2014 ◽  
Vol 29 (10) ◽  
pp. 1093 ◽  
Author(s):  
ZHOU Wei ◽  
XIAO Peng ◽  
LI Yang ◽  
LUO Heng ◽  
HONG Wen
Keyword(s):  
Carbon Fibers ◽  
Composite Coatings ◽  
Microwave Absorbing Properties ◽  
Microwave Absorbing

Full-Scale Torsion, Shear, and Bending Tests of Prestressed I-Girders

PCI Journal ◽  
1978 ◽  
Vol 23 (2) ◽  
pp. 22-41 ◽  
Author(s):  
Alan H. Mattock ◽  
A. N. Wyss
Keyword(s):  
Full Scale ◽  
Bending Tests

Laser cladding Ni-base composite coatings reinforced by in-situ synthesized multiple carbide particles

2008 ◽  
Author(s):  
Ruiquan Kang ◽  
Mingxing Ma ◽  
Wenjin Liu ◽  
Minlin Zhong ◽  
Yide Kan ◽  
...  
Keyword(s):  
Laser Cladding ◽  
Composite Coatings ◽  
Base Composite ◽  
Carbide Particles

Determination of Concrete Cube Strength from Used Samples / Určení Krychelné Pevnosti Betonu U Použitých Zkušebních Trámců

2012 ◽  
Vol 12 (2) ◽  
pp. 186-194 ◽  
Author(s):  
Oldřich Sucharda ◽  
David Mikolášek ◽  
Jiří Brožovský
Keyword(s):  
Compressive Strength ◽  
Concrete Beams ◽  
Linear Analysis ◽  
Bending Tests ◽  
Cube Strength ◽  
Non Linear ◽  
Compressive Strength Of Concrete ◽  
Concrete Cube

Abstract This paper deals with the determination of compressive strength of concrete. Cubes, cylinders and re-used test beams were tested. The concrete beams were first subjected to three-point or fourpoint bending tests and then used for determination of the compressive strength of concrete. Some concrete beams were reinforced, while others had no reinforcement. Accuracy of the experiments and calculations was verified in a non-linear analysis.

Bending Tests of Panel Shear Walls

2001 ◽  
Vol 85 (6) ◽  
pp. 43-48
Author(s):  
Peter Dobrila ◽  
Miroslav Premrov
Keyword(s):  
Shear Walls ◽  
Bending Tests ◽  
Panel Shear
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