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DOI 10.1515/jmsp-2012-0011   J. Manuf. Sci. Prod. 2012; 12(3–4): 181–189 Siva Prasad Kondapalli*, Srinivasa Rao Chalamalasetti, and Nageswara Rao Damera Optimization of Fusion Zone Grain Size, Hardness and Ultimate Tensile Strength of Pulsed Current Micro Plasma Arc Welded Inconel 625 Sheets Using Genetic Algorithm Abstract: Nickel alloys have gathered wide acceptance in the fabrication of components, which require high tem- perature resistance and corrosion resistance, such as metal bellows used in expansion joints in aircraft, aero- space and petroleum

J. Manuf. Sci. Prod., Vol. 12 (2012), pp. 95–103 Copyright © 2012 De Gruyter. DOI 10.1515/jmsp-2012-0006 Study on Effect of Welding Speed on Micro Structure and Mechanical Properties of Pulsed Current Micro Plasma Arc Welded AISI 304L Sheets Kondapalli Siva Prasad,1; Chalamalasetti Srinivasa Rao2 and Damera Nageswara Rao3 1 Assistant Professor, Department of Mechanical Engi- neering, Anil Neerukonda Institute of Technology & Sci- ences, Visakhapatnam, India 2 Associate Professor, Department of Mechanical Engi- neering, AU College of Engineering, Andhra University

DOI 10.1515/jmsp-2012-0031   J. Manuf. Sci. Prod. 2013; 13(1–2): 15 – 23 Kondapalli Siva Prasad*, Chalamalasetti Srinivasa Rao and Damera Nageswara Rao Effect of Welding Parameters on Pitting Corrosion Rate in 3.5N NaCl of Pulsed Current Micro Plasma Arc Welded AISI 304L Sheets Abstract: Austenitic stainless steel sheets have gathered wide acceptance in the fabrication of components, which require high temperature resistance and corrosion resis­ tance, such as metal bellows used in expansion joints in  aircraft, aerospace and petroleum industry. In case of

0026-0576(00)80346-3. http://dx.doi.org/10.1016/S0026-0576(00)80346-3 [6] Paatsch, W. (1990). In J. C. Puippe & F. Leaman (Eds.), Pulseplating. Saulgau: Eugen G. Leuze Verlag. [7] Ramanauskas, R., Gudavičiütč, L., Juškčnas, R., & Ščit, O. (2007). Structural and corrosion characterization of pulse plated nanocrystalline zinc coatings. Electrochimica Acta, 53, 1801–1810. DOI: 10.1016/j.electacta.2007.08.036. http://dx.doi.org/10.1016/j.electacta.2007.08.036 [8] Saber, K., Koch, C. C., & Fedkiw, P. S. (2003). Pulse current electrodeposition of nanocrystalline zinc

J. Manuf. Sci. Prod. 2014; 14(2): 79 – 85 Kondapalli Siva Prasad*, Chalamalasetti Srinivasa Rao and Damera Nageswara Rao Multi-objective Optimization of Weld Bead Geometry Parameters of Pulsed Current Micro Plasma Arc Welded AISI 304L Stainless Steel Sheets Using Enhanced Non-dominated Sorting Genetic Algorithm Abstract: Pulsed Current Plasma Arc Welding (PCPAW) is one of the most widely used welding processes in sheet metal manufacturing industry. In any fusion arc welding process, the weld bead geometry plays an important role in determining the

phosphorus and nickel additions. Lower heat inputs and grain refinement effect produced on weld zone by pulsed current was favourable for plasma arc welding [ 6 ]. Use of filler wire with high manganese, aluminium and titanium contents during laser welding of low carbon sintered steel resulted in good strength weld joint. Also it promoted weld joint quality without porosity, blow holes, fusion zone cracking, etc. [ 7 ]. GTAW, laser beam welding and friction resistance welding were reported to be successfully carried out on sintered steels. Sound weld joint was produced due

J. Manuf. Sci. Prod., Vol. 11 (2011), pp. 39–48 Copyright © 2011 De Gruyter. DOI 10.1515/JMSP.2011.005 Optimizing Pulsed Current Micro Plasma Arc Welding Parameters to Maximize Ultimate Tensile Strength of SS304L Sheets Using Hooke and Jeeves Algorithm Kondapalli Siva Prasad,1; Chalamalasetti Srinivasa Rao,2 Damera Nageswara Rao3 and Yarlagadda Vishnu Srinivasa Murthy4 1 Department of Mechanical Engineering, Anil Neerukonda Institute of Technology & Sciences, Visakhapatnam, India 2 Department of Mechanical Engineering, Andhra Univer- sity, Visakhapatnam, India 3

[ 10 ], microemulsion [ 11 ] and electrochemical techniques [ 12 , 13 ]. However, some of these methods require higher temperature and pressure and require complex process and technology. The shape and size of nanoparticles produced by various methods can vary depending on the conditions and methods of synthesis. in electrosynthesis, the concentration of electrolyte and current density affect the size and morphology of nanoparticles. The current can be applied in pulse mode. The pulsed current decreases the nucleation growth and increases the nucleation rate

and optimized. Ma et al. [ 15 ] prepared Ni-SiC composite thin films via ultrasonic-assisted pulse-current (UAPC) deposition. They found that the average grain diameters of Ni and SiC in the UAPC-deposited thin film were 63.6 and 38.5 nm, respectively. Amadeh et al. [ 16 ] prepared Ni-SiC nanocomposite coatings with various SiC contents by pulse electrodeposition from a modified Watts bath containing SiC nanoparticles. The properties of thin films have been shown to mainly depend on both the matrix phases and the amount and distribution of co-deposited ceramic

. Note also that sham stimulation is used to measure the likelihood of placebo effects, and therefore cannot be used as an overall control for active stimulation. The most common tES technique is transcranial direct current stimulation (tDCS); other techniques are transcranial alternating current stimulation (tACS), transcranial random noise stimulation (tRNS), and transcranial pulsed current stimulation (tPCS). These techniques employ weak current (e.g. 1 mA) to the scalp via saline-soaked sponge electrodes, leading to changes in neuronal excitability ( Nitsche and