Effect of Temperature and Time on Nickel Aluminide Coating Deposition

Chandio, Ali Dad; Abro, Shahid Hussain

doi:10.22581/muet1982.1804.04

Cited by 5 publications

(3 citation statements)

References 12 publications

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“…This rig covers with a Lead shell to avoid radiations leakage. These radiations are injurious and harmful to the living organism, exposed material and apparatus has to be dumped soon after the testing and use [4][5][6].…”

Section: Accelerated Ageingmentioning

confidence: 99%

Ageing Analysis of Power Cable used in Nuclear Power Plant

Abro

Aqeel

Alaboodi³

et al. 2020

Mehran Univ. res. j. eng. technol.

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The aim of nuclear power plant ageing management and assessment is to maintain an adequate safety level throughout the life time of the plant and helps in determining the useful operation. Various factors involved in the insulation of polymeric cables such as continuous heat, radiation and atmosphere result in the alteration of chemical and physical properties as well as lowers the service life of material. PVC (Poly Vinyl Chloride) is the most commonly used insulation material in NPP (Nuclear Power Plant). Purpose of this work is to predict the service life of PVC insulation cable for which extrapolation ageing has been performed. Ageing mechanism proceeds in laboratory scale rig to provide temperature and radiation sources. The variation in temperature is regulated and monitored through thermocouple. At higher temperature, semi crystalline free radical may escape out resulting in the degradation of polymer. Different tests have been carried out like shore hardness testing, tensile testing, Differential Scanning Calorimeter and Thermo gravimetric Analysis before and after ageing to analyze the Ageing effect. The impact of ageing days upon yield strength of single stress ageing has been carried out in this research work and it is found that aging has significant effect on service life of cables used in power plants.

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Section: Accelerated Ageingmentioning

confidence: 99%

Ageing Analysis of Power Cable used in Nuclear Power Plant

Abro

Aqeel

Alaboodi³

et al. 2020

Mehran Univ. res. j. eng. technol.

Self Cite

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“…This is a common and widely used technique adopted for increasing the strength of steel. It was found that it is the most cheap and easy method of grain refinement, but during the last twenty years there was not paid attention to the fact that the nucleation sites for forming these nitride particles are more valuable regarding their effect on limiting the grain boundary movement [11][12][13][14].…”

Section: Introductionmentioning

confidence: 99%

Understanding the Effect of Aluminum Addition on the Forming of Second Phase Particles on Grain Growth of Micro-Alloyed Steel

Abro

Moria

Chandio

et al. 2020

Eng. Technol. Appl. Sci. Res.

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The formation of second phase particles in the steel matrix during melting and casting plays an important role in controlling the grain size of steel. An attempt is made in the present work to find the role of nitrogen on forming nitride particles either with aluminum or titanium. Two steel samples with the same titanium and aluminum weight percent in their chemical composition were collected after the hot rolling process. Solution heat treatment at 1350°C for 60min holding time was used to dissolve the particles and then the steel samples were reheated at 800°C for 60min, water quenched and their microstructure was revealed by usual grinding and polishing process using 2% Nital. A transmission electron microscope connected with EDS was used to reveal the morphology of the second phase particles. The samples for TEM analysis were prepared by the replica extraction method in 5% Nital solution. The samples were then caught in 3mm copper grid for TEM analysis. TEM micrographs revealed the second phase particles in the matrix of steel. EDS peaks were studied and titanium peaks were found in both samples and surprisingly there was not any peak found for aluminum.

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“…No one has given the attention that aluminum nitride particles can be useful for grain refinement technique, but it also affects the austenite formation kinetics limiting the grain boundary movement. [3,14,16,17] these riddle and unrevealed features of AlN particles have been studied in the present research work. [3, [18][19][20][21][22][23].…”

Section: Introductionmentioning

confidence: 99%

Nano Particles Effect on Transformation Behavior and Mechanical Properties on Commercial Steel Used for Automobile Parts

2020

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A scientific study has been performed in this research work on the basis of experimental results and ramification to divulge the advancement of second phase particles and its influence on ferrite and austenite phase transformation in less carbon-manganese added steel. Two steels have been engaged in this competition with and without aluminum addition along with nitrogen. To fade out the already present particles, as received steel under investigation was solution heat treated at 1200°C and then both the steel samples were heat treated at 750°C and 810°C for 15, 20, 35, and 70 sec incubation time in the cyanide added liquid bath furnace and were rapidly cooled from elevated temperature at room temperature in ordinary water. Metallography was performed after etching technique in two etchant solutions microstructural features with advanced Olympus optical microscope with polarized light. To further enlarge the important microstructure SEM was used to capture the micrographs. It was concluded that aluminum combine with nitrogen stimulate the fine aluminum nitride (AlN) particles and these particles were the major source to hinder the grain boundary mobility and consequently phase transformation was interrupted in aluminum added steel and it lowers the critical temperatures. Surprisingly there was no such attitude was observed in without aluminum added steel.

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Effect of Temperature and Time on Nickel Aluminide Coating Deposition

Cited by 5 publications

References 12 publications

Ageing Analysis of Power Cable used in Nuclear Power Plant

Ageing Analysis of Power Cable used in Nuclear Power Plant

Understanding the Effect of Aluminum Addition on the Forming of Second Phase Particles on Grain Growth of Micro-Alloyed Steel

Nano Particles Effect on Transformation Behavior and Mechanical Properties on Commercial Steel Used for Automobile Parts

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