Numerical Analysis Of Heat Transfer Through Nimonic 80A Alloy

Vol. 2  Issue 2
Year: 2014
Issue:Jul-Sep
Title:Numerical Analysis Of Heat Transfer Through Nimonic 80A Alloy
Author Name:Neeraj Sharma
Synopsis:

Heat transfer is the moment of energy, due to difference in the temperature of a body. There are three modes of heat transfer viz. conduction, convection and radiation. In this, the analysis is to be made through an alloy, so the characteristic equations of conduction are considered. In the numerical analysis, this moment is analyzed with the help of equations. The Finite Element Analysis (FEA) has become an effective way to numerically simulate heat transfer. The objective of the study was to simulate heat transfer process in different orientations of the work-piece. Analysis has been carried out on Nimonic 80A alloy with their basic properties. First time, one end of the rod is kept at room temperature and the other end at 600K. The variation is observed and drawn in the form of a graph. Another time, one surface of the specimen is kept at room temperature and the other surface at 600K temperature. The variation of temperatures in both cases were analyzed and is found that heat flows from higher temperature to lower temperature up to a certain distance and after that, the material is at room temperature. The color codes distinguish the hotness and coldness of the work-piece.

Transport Properties Of Metallic Nanowires On Silicon Substrate

Vol.2  No.1

Year : 2014

Issue : Apr-Jun

Title : Transport Properties Of Metallic Nanowires On Silicon Substrate

Author Name : Jaskiran Kaur, Surinder Singh

Synopsis :

This paper presents the electrical properties of the randomly distributed metallic (Co, Ni and Fe) nano/micro wires on Silicon. Deposition was carried out potentiostatically into the pores of the track-etch polycarbonate membrane spin coated onto the Silicon substrate. Spin coated films were irradiated with 150MeV Ni (+11) ions at a fluence of 8E7 2 ions/cm , followed by UV irradiation and chemically etching in aqueous NaOH (6N, at room temperature). Later morphological, and electrical properties of the so deposited nano-/micro structures were studied.

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Effect Of Compositional Variation Of The Physical Parameters Of Ge-Se-In Glass System

Vol.2  No.1

Year : 2014

Issue : Apr-Jun

Title : Effect Of Compositional Variation Of The Physical Parameters Of Ge-Se-In Glass System

Author Name : Surbhi Sharma, Amit Sarin, Navjeet Sharma

Synopsis :

In this paper an attempt has been made to theoretically find the variation of some important parameters of one of the arsenic fre Ge-Se glass system by the addition of In content. Various parameters like co-ordination number, floppy modes, bond energy, electro negativity, heat of atomization, cohesive energy and glass transition temperature have been calculated for Ge Se In (x=0,1,2,3,4,5,6) glass system. Glass transition temperature (Tg) is calculated by using 16 84-x x two approaches i.e. Tichy-Ticha and Lankhorst approaches. Tg seems to be increasing in theoretical calculations while average single bond energy is decreasing with the increase in the content of In.

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Importance Of Post Curing And Radiation Assisted Post Curing For Fiber Reinforced Polymer Composites – A Review

Vol.2  No.1

Year : 2014

Issue : Apr-Jun

Title : Importance Of Post Curing And Radiation Assisted Post Curing For Fiber Reinforced Polymer Composites – A Review

Author Name : Dr Kiran Kumar .P

Synopsis :

FRP composites have been the part and parcel of many industrial and domestic applications. It is not only limited to aerospace, though the roots are from aerospace there is a paradigm shift in methods and applications. It covers wide range of products from headgear to aircrafts. Post curing leads to improved properties due to better interfacial bonding between matrix and fiber. Maximum amount of time is consumed in post curing of polymer composites. In this paper alternate method particularly radiation post curing is discussed in detail. Comparison between thermal curing with IR and other radiation curing methods is reviewed.

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Mechanical And Metallurgical Characterisation Of Friction Stir Welded Aluminium Alloys Aa5083-O And Aa6061-T4

Vol.2  No.1

Year : 2014

Issue : Apr-Jun

Title : Mechanical And Metallurgical Characterisation Of Friction Stir Welded Aluminium Alloys Aa5083-O And Aa6061-T4

Author Name : Kudzanayi Chiteka, Narayana Yuvaraj

Synopsis :

This research presents the mechanical and metallurgical properties of dissimilar joints of AA5083-O and AA6061-T4 aluminum alloy. Two rotational speeds, 630 and 1600 rpm and three traverse speeds 16, 25, and 40 mm/min were applied to perform the joining process. Macrostructural observations were done to evaluate the weld quality and some semi-circular profiles appeared on the trailing side of the weld and flash were also visible on the retreating side of the joint. Optical microscopy was used to determine the orientation and distribution of the grains in the weld and the adjacent zones. Dynamic recrystallization was evident in the dissimilar joint and the fine grain structure confirmed this. The material in the stir zone contained a mixture of both materials but AA6061-T4 which was fixed on the advancing side dominated the stir zone and thus it influenced the joint performance. Mechanical properties of the joints i.e. ultimate strength, elongation, and microhardness were determined for different weld zones and material combinations. Material combinations included joints made of similar AA5083-O or AA6061-T4 as well as dissimilar joints of AA5083-O and AA6061-T4. The dissimilar joint exhibited intermediate mechanical properties. Hardness values were generally less in the advancing side compared to the retreating side and also they increased from the bottom towards the top of the joint.

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PMMA Based Polymer Gel Electrolyte Containing LiCF3SO3

Vol.2  No.1

Year : 2014

Issue : Apr-Jun

Title : PMMA Based Polymer Gel Electrolyte Containing LiCF3SO3

Author Name : Narinder Arora, Ajay Sharma , Amit Kumar , Rajesh Kumar

Synopsis :

Effect of polymer (PMMA) and salt (LiCF3SO3 ) on the conducting behaviour of polymer gel electrolytes in non-volatile solvent (PC) has been studied. The maximum ionic conductivity ( = 2.92 mS/cm) of polymer gel electrolyte has been observed at room temperature. An anomalous conducting behaviour is observed at small content of PMMA addition in o o gel electrolyte. Small increase in conductivity observed with increasing temperature (range 10 -70o C) is in factor-wise only, which makes these gel electrolytes suitable for many device applications.

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Preparation And Characterisation Of Rare Earth Doped Phosphate Glasses

Vol.2  No.1

Year : 2014

Issue : Apr-Jun

Title : Preparation And Characterisation Of Rare Earth Doped Phosphate Glasses

Author Name : Manpreet Kaur, Mehak Mahajan , Mohini Bhatia , Sarabjit Kaur , Lakhwant Singh

Synopsis :

Phosphate glasses with composition 50P O -30CaO-(20-x) Li O-xCeO with x varying from 0-2.0 mol % were prepared 2 5 2 2 using the conventional melt quench technique. The amorphous nature of prepared glasses was confirmed from the XRD(X-Ray Diffraction) spectra. The density and Molar volume of the glasses was found using the Archimedes principle. 3 The value of the density lies in the range of 3.58-3.71 g/cm . The density of the prepared glasses was found to increase with the concentration of CeO . This was explained as the molecular weight of CeO is more as compared to the 2 2 molecular weight of Li O. The Raman spectra was obtained for the prepared glass samples and it was found that no new 2 peaks are formed with the doping of CeO , and only there is a change in the intensity of peaks and the peaks are red 2 shifted. The bandgap energy is found to decrease with CeO doping due to the formation of more NBOs.

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