Effect of Oxygen and of Water Vapor on the Fatigue Life of Nickel at 300 C

2009 ◽  
pp. 217-217-17 ◽  
Author(s):  
HH Smith ◽  
P Shahinian
Keyword(s):  
Water Vapor ◽  
Fatigue Life ◽  
Effect Of Oxygen

Effect of Oxygen and Water in the CO Photocatalytic Oxidation with TiO2

2011 ◽  
Vol 324 ◽  
pp. 149-152
Author(s):  
Carlos Youssef ◽  
Eric Puzenat ◽  
Samir Najm ◽  
Nicole Jaffrezic-Renault ◽  
Chantal Guillard
Keyword(s):  
Water Vapor ◽  
Active Sites ◽  
Photocatalytic Oxidation ◽  
Low Oxygen ◽  
High Concentration ◽  
Co Concentration ◽  
Langmuir Hinshelwood Mechanism ◽  
Effect Of Oxygen ◽  
Two Parameters ◽  
Low Oxygen Concentration

TiO2P25 catalyst was used to study the photocatalytic oxidation of CO to CO2at 288K. Two parameters, O2and H2O were used to study its effect on the photocatalytic process. The dependency of the reaction rate on the CO concentration and water vapor was explained in terms of Langmuir-Hinshelwood mechanism. The presence of a high concentration of water vapor inhibits the CO photocatalytic oxidation at low oxygen concentration. We have noted an adsorption competition between CO and H2O on the TiO2active sites.

Corrosion Prevention Compound on the Fatigue Life of 2024-T3 Aluminum Alloy

Materials ◽  
2005 ◽  
Author(s):  
M. A. Wahab ◽  
J. H. Park ◽  
S. S. Pang
Keyword(s):  
Aluminum Alloy ◽  
Water Vapor ◽  
Fatigue Life ◽  
Crack Growth ◽  
Fatigue Loading ◽  
Corrosive Environment ◽  
Constant Amplitude ◽  
Corrosion Prevention ◽  
Electron Microscopic ◽  
Stress Ratios

Corrosion-Prevention-Compounds (CPC) are commonly used to prevent corrosion in the aircraft industry. The presence of corrosive environment on aircraft structures has detrimental effects on the aircraft components which reduces the fatigue life and may also accelerate the crack growth rate in the structures. This is an experimental study on 2024-T3 aluminum alloy to investigate the effect of fatigue crack growth (life from threshold crack growth to final failure) using CPC on fatigue life. The corrosion fatigue with the presence of water-vapor reduces the total fatigue life. The fatigue life with the CPC treatment is shown to increase the fatigue life due to the protection from the corrosive environment containing water-vapor. Test results are obtained for various stress ratios and frequencies with and without the CPC treatment under constant amplitude fatigue loading in water vapor. The second aspect of this work is to investigate the effect of periodic overloads and the limitation in their spacing cycles on the fatigue life under constant amplitude fatigue loading. The results confirm the earlier work that the fatigue life increases due to the periodic overloads in 2024-T3 aluminum alloy. The interactions between overloads that are controlled by the spacing cycles between overloads are also examined. From scanning electron microscopic work the transition from the ductile to brittle mode is observed clearly in this experimental work.

Influence of oxidation on fatigue life of a carbon/silicon carbide composite in water vapor containing environments

2009 ◽  
Vol 35 (4) ◽  
pp. 1397-1402 ◽  
Author(s):  
Chidong Liu ◽  
Laifei Cheng ◽  
Hui Mei ◽  
Xingang Luan
Keyword(s):  
Silicon Carbide ◽  
Water Vapor ◽  
Fatigue Life ◽  
Carbide Composite

The effect of oxygen and water vapor partial pressures on the total conductivity of BaCe0.7Zr0.1Y0.2O3–δ

Ionics ◽  
2017 ◽  
Vol 23 (3) ◽  
pp. 795-801 ◽  
Author(s):  
N. Danilov ◽  
J. Lyagaeva ◽  
A. Kasyanova ◽  
G. Vdovin ◽  
D. Medvedev ◽  
...  
Keyword(s):  
Water Vapor ◽  
Total Conductivity ◽  
Partial Pressures ◽  
Effect Of Oxygen

Effect of oxygen and water vapor on the removal of styrene and ammonia from nitrogen by non-pulse corona-discharge at elevated temperatures

2004 ◽  
Vol 97 (2-3) ◽  
pp. 213-223 ◽  
Author(s):  
Wiwut Tanthapanichakoon ◽  
Tawatchai Charinpanitkul ◽  
Sahat Chaiyo ◽  
Nantamas Dhattavorn ◽  
Jintawat Chaichanawong ◽  
...  
Keyword(s):  
Water Vapor ◽  
Corona Discharge ◽  
Elevated Temperatures ◽  
Pulse Corona ◽  
Pulse Corona Discharge ◽  
Effect Of Oxygen

scholarly journals ANALYSIS OF REDUCING THE GROWTH RATE OF FATIGUE CRACKS FROM OVERLOADS OF VARIOUS VALUE AND CHARACTER IN ALUMINUM ALLOY 2024-T3

2021 ◽  
pp. 54-59
Author(s):  
A. N. Savkin ◽  
D. S. Denisevich ◽  
A. A. Sedov ◽  
K. A. Badikov ◽  
A. N. Baryshnikov
Keyword(s):  
Fatigue Life ◽  
Crack Growth ◽  
Prediction Models ◽  
Fatigue Cracks ◽  
Growth Curves ◽  
Weight Fraction ◽  
Active Particles ◽  
Aluminum Alloy 2024 ◽  
Effect Of Oxygen ◽  
Crack Growth Rates

This work highlights the results of tests with overloads and underloads on aluminum samples in the region of near-threshold crack growth rates. Crack growth curves and fatigue life values were obtained that the classical fatigue life prediction models of Elber, Barsom, Wheeler and Willenborg could not explain. Fractographic analysis verified the correctness of the fatigue fracture curves. The chemical analysis of the oxygen content on the fractured surfaces of the sample by the method of energy dispersive X-ray spectroscopy showed the possibility of a relationship between the weight fraction of active particles and residual stresses in the material and confirmed some of the provisions of the theory of brittle microfracture on the effect of oxygen and hydrogen on fatigue crack propagation.

Sign in / Sign up

Export Citation Format

Share Document