Total Life Estimation of a Compressor Blade with Corrosion Pitting, SCC and Fatigue Cracking

Pedram, Omid; Poursaeidi, Esmaeil

doi:10.1007/s11668-018-0417-5

Cited by 14 publications

(2 citation statements)

References 24 publications

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“…To enhance the safety and decrease the cost of industrial systems, characterization of the evolution of the damage is essential 2 . Experimental methods, such as eddy current, electrochemical measurements 3 , optical microscopy, scanning electron microscopy (SEM), x-ray diffraction [4][5][6] , atomic force microscopy (AFM) 7 , and digital holography 8 can provide useful information about pitting corrosion. Here, we are going to examine the sample by dynamic speckle pattern analysis.…”

Section: Introductionmentioning

confidence: 99%

Evaluation of pitting corrosion by dynamic speckle pattern analysis

Pedram

Jamali

Rad

et al. 2022

Preprint

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We use the dynamic speckle pattern method for the investigation of pitting corrosion. Pitting corrosion is a major failure mechanism in metals caused by the depassivation of a small area. The sample is Custom 450 stainless steel in 3.5 wt% NaCl solution and a potential of 350 mV SCE is applied to onset the corrosion. The analysis of the speckle patterns resulting from the laser scattering from the sample results in the quantitate evaluation of pitting during the experiment. The analysis shows that the growth rate of pitting in longer times decreases. This method for corrosion evaluation is low-cost, in situ, and easy to implement, and it is especially useful when the samples are difficult to reach for microscopic studies.

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Section: Introductionmentioning

confidence: 99%

Evaluation of pitting corrosion by dynamic speckle pattern analysis

Pedram

Jamali

Rad

et al. 2022

Preprint

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“…Advanced aero engine compressor blades are mostly made up by high strength titanium alloys [1]. They are generally subjected to harsh environments, leading to serious due to erosion and corrosion damages [2,3]. This significantly limits the service of the aircraft, especially transport aircrafts and helicopters serving in deserts or oceans [4].…”

Section: Introductionmentioning

confidence: 99%

Corrosion Damage Mechanism of TiN/ZrN Nanoscale Multilayer Anti-Erosion Coating

Geng

Sun

et al. 2018

Coatings

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TiN/ZrN multilayers can effectively improve the erosion resistance of metals, particularly titanium alloys employed in aero engines. To explore the corrosion damage mechanism of TiN/ZrN nanoscale multilayers (nanolaminate), a novel [TiN/ZrN]100 nanolaminate coating was deposited on Ti-6Al-4V alloys by multi-arc ion plating method. Salt spray corrosion tests and hot corrosion experiment were carried out to evaluate the corrosion resistance of the coating. The corrosion and damage mechanisms were explored with the help of detailed microstructure, phase composition and element distribution characterizations. The salt spray corrosion tests showed that the [TiN/ZrN]100 nanolaminate coating possessed good corrosion resistance, which protected substrate against the corrosion. The low temperature hot corrosion tests showed that the oxidation occurred on the surface of the coating, which improved the oxidation resistance of the sample. However, the oxidized droplets squeezed the coating, and destroyed the oxidized layers. As a result, the coating was peeled off from the substrate. The research highlights the corrosion resistance of the novel TiN/ZrN nanolaminate coating and offers a support for their application in engine compressor blade.

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