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Sivashankar, V.
- An Investigation of Mechanical Properties of Friction Stir Butt Welding Processes on AA6082 and AA5083 Alloy
Authors
Source
International Journal of Innovative Research and Development, Vol 3, No 5 (2014), Pagination:Abstract
Friction Stir Welding (FSW) is a solid state welding process. In particular, it can be used to join high-strength aerospace aluminum and other metallic alloys that are hard to weld by conventional fusion welding. It was performed on 6 mm thickness AA6082 and AA5083 Aluminum alloys. Aluminum alloy light weight, softer, tendency to bend easily, cost effective in terms of energy requirements so aluminum alloy has selected in this FSW technique. In this welding when two metals are joined with the help of heat generated by rubbing metals against each other. The friction stir welding is mostly used for joining aluminum alloys. The main defects occurring in this welding are holes, material flow rate. These defects are mainly caused due to improper selection of welding parameters.
In this project the mechanical properties of aluminum alloy AA6082 and AA5083 has tested with the help of tensile testing machine, hardness testing machine and non destructive type radiographic testing. In this experimental the testing of mechanical properties based on the input parameters such as rotational speed, tool speed and axial force with proper welding parameters. Finally, the experimental results will be compared and analyzed.
Keywords
FSWFull Text
- Structural, Optical and Dielectric Characterization of Guanidine Acrylate (GuAcr) NLO Single Crystals
Authors
1 Department of Physics, St. Xavier’s College, Tirunelveli - 627002, Tamil Nadu, IN
2 Department of Chemistry, TDMNS College, T. Kallikulam, Tirunelveli - 627113, Tamil Nadu, IN
Source
Journal of Surface Science and Technology, Vol 34, No 3-4 (2018), Pagination: 98-103Abstract
Organic single crystal of Guanidine Acrylate (GuAcr) was grown by simple inexpensive slow evaporation technique. The grown crystal was subjected into various characterizations like single crystal XRD, UV-Vis, FTIR studies, electrical, mechanical properties and SHG technique. The XRD data shows that the crystal belongs to orthorhombic structure. The UV-Vis spectral studies observed that the cutoff wavelength of the grown crystal is 320nm. Optical band gap of the grown crystal was also calculated, and it was found to be 3.99 eV. Vibrational frequencies of GuAcr crystal were confirmed by FTIR spectra. Electrical properties of the GuAcr single crystals were studied using impedance spectroscopy. Decreasing impedance with increasing temperature is indicated that the negative temperature co-efficient of resistance behavior like an insulator. Dielectric response of the crystal with varying frequencies was also studied. Second harmonic generation of the title compound was studied using Kurtz Perry- powder SHG technique. It reveals that as grown crystal is suitable for Nonlinear Optical (NLO) device fabrications.Keywords
Dielectric, Guanidine Acrylate (GuAcr), Impedance Analysis, Optical Properties, Slow Evaporation.
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