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A Review on Critical Aspects of 316ln Austenitic Stainless Steel Weldability.
Harish Kumar D,
A. Somireddy,
K. Gururaj Gururaj
Issue:
Volume 1, Issue 1, December 2012
Pages:
1-7
Published:
30 December 2012
Abstract: Austenitic stainless steels are widely used for different applications in chemical, petrochemical, fertilizer, food processing and nuclear industries. These steels posses good weldability but suffer from the problems like sensitization leading to inter-granular corrosion, hot cracking or micro fissuring and stress corrosion cracking. Nitrogen alloyed austenitic stainless steels designated as 316LN contain low carbon due to which the risk of sensitization can be reduced. These steels are alloyed with nitrogen to compensate for the loss of strength due to decreased carbon content. Welding process like Tungsten Arc welding (TIG), Activated Tungsten Arc welding (A-TIG) and Multi Pass Tungsten Arc welding (MP-TIG) have been used for the fabrication of industrial components. This paper addresses the laser welding aspects, which may be of considerable interest because it offers several advantages over other welding processes.
Abstract: Austenitic stainless steels are widely used for different applications in chemical, petrochemical, fertilizer, food processing and nuclear industries. These steels posses good weldability but suffer from the problems like sensitization leading to inter-granular corrosion, hot cracking or micro fissuring and stress corrosion cracking. Nitrogen allo...
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Soil Modelling Techniques
Issue:
Volume 1, Issue 1, December 2012
Pages:
8-13
Published:
30 December 2012
Abstract: The main objective of grounding electrical systems is to provide a suitably low resistance connection to the substation above it the low resistance is needed to limit the potential rise of the substation from the potential of the surrounding earth. This potential rise must be limited so that there is no danger to anyone standing on ground but touching, for example, the substation fence. In order to ensure that the ground potential rise, and touch and step voltages, an accurate soil model are needed to perform calculations that ensures that the resistance of the grounding grid through the earth is sufficiently low. This soil model comes from the tested soil structure at the proposed grid location. This paper provides a literature survey of the various soil testing methods and soil modeling. The paper is divided into 2 parts: Part 1 describes the current soil measurement techniques; Part 2 examines the model construction of the uniform and two layer soil structures, and the short comings of the current modeling techniques.
Abstract: The main objective of grounding electrical systems is to provide a suitably low resistance connection to the substation above it the low resistance is needed to limit the potential rise of the substation from the potential of the surrounding earth. This potential rise must be limited so that there is no danger to anyone standing on ground but touch...
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Iron-doped BaTiO3: Influence of iron on physical properties
Ashutosh Mishra,
Niyati Mishra
Issue:
Volume 1, Issue 1, December 2012
Pages:
14-22
Published:
30 December 2012
Abstract: Barium Titanate BaTiO3 is known for both its electric and magnetic properties. The synthesis and characterization of iron doped barium titanate; BaTi1-xFexO3 (x= 0.005, 0.01, 0.015) was investigated with a view to understand its structural, magnetic and electrical properties. A finest possible sample of Iron doped micro particles of BaTiO3 (BTO) with possible tetragonal structure via a solid-state route was prepared. Prepared samples of BaTi1-xFexO3 (Fe-BTO) were structural characterized by X-ray diffraction (XRD) then XRD data fitted by Rietveld refinement. Fourier Transform Infrared Spectroscopy were use to determine the Ti-O bond length position according to increment in Iron on Titanium site. The dielectric constant measurements of the samples were carried out at 1 MHz. Vibrating Sample Magnetometer (VSM) measurements revealed the magnetic nature of Iron doped BaTiO3. Magnetic Moment verses Temperature plot took at 1Tesla and Magnetic Moment verses Magnetic field plot took at low temperature (10K). Ferroelectric hysteresis loop traced at the electric field in-between -8 to +8 (KV/cm). Details of the preparation technique, experimental results, data analysis, and the interpretation will be presented.
Abstract: Barium Titanate BaTiO3 is known for both its electric and magnetic properties. The synthesis and characterization of iron doped barium titanate; BaTi1-xFexO3 (x= 0.005, 0.01, 0.015) was investigated with a view to understand its structural, magnetic and electrical properties. A finest possible sample of Iron doped micro particles of BaTiO3 (BTO) wi...
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