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Nirmala, O.
- Design and Fabrication of Asymmetric Multi-Electrodes for Fabrication of Corrugated Steel Panels
Abstract Views :182 |
PDF Views:1
Authors
Affiliations
1 Dept. of Mechanical Engineering, Sri Venkateswara University College of Engineering, Tirupati, Andhra Pradesh, IN
1 Dept. of Mechanical Engineering, Sri Venkateswara University College of Engineering, Tirupati, Andhra Pradesh, IN
Source
Manufacturing Technology Today, Vol 15, No 1 (2016), Pagination: 25-30Abstract
The sandwich composites are multilayered materials made by bonding stiff, high strength skin facings to low density core material. The main benefits of using the sandwich concept in structural components are the high stiffness and low weight ratios. Open core metallic sandwich panels are novel type of structures, enabled by innovative fabrication and topology design tools. Such fabricated open core structures welding by Resistance Spot Welding (RSW). The problems associated with RSW are tendency of alloying with the electrode resulting in increased tool wear, and subsequent deterioration of weld quality. In this present work the experimental studies were conducted under type of spot weld, welding current, welding time, hold time and material combination. The complicated behaviour of this process must be analysed to set the optimum parameters to get good quality weld. Based on orthogonal array the experiments were conducted tensile strength test on universal testing machine find out Tensile strength which indicates shear load as per model, Ultimate Shear Stress (UTS) which indicates Shear stress of the weld joint and maximum displacement. The main objective is to predict the better operation conditions of spot weld and influence of each parameter is evaluated.
Keywords
Sandwich Panels, Corrugated Sheets, Multi-Electrodes, Resistance Spot Welding.
- Synthesis of Hexagonal YMnO3 Nanoparticles by Sol-Gel Route and their Characterization
Abstract Views :330 |
PDF Views:2
Authors
Affiliations
1 Department of Mechanical Engineering, SVU College of Engineering, Tirupati, IN
2 Department of Physics, SV University, Tirupati, IN
1 Department of Mechanical Engineering, SVU College of Engineering, Tirupati, IN
2 Department of Physics, SV University, Tirupati, IN
Source
Manufacturing Technology Today, Vol 17, No 9 (2018), Pagination: 32-37Abstract
Hexagonal yttrium manganese oxide (h-YMnO3) nanoparticles were prepared by a modified citrate sol-gel process at a lower heating temperature (200°C-230°C) followed by grinding and calcination. The structure and morphology of the synthesized nanoparticles were studied using an X-ray diffraction (XRD) technique and scanning electron microscope (SEM). YMnO3 nanoparticles with a uniform micro structure were observed in SEM images. The XRD analysis showed that the prepared precursor powder was well crystallized. The elemental compositional analysis using energy-dispersive X-ray analysis (EDX) confirmed the elemental base composition of pure yttrium, manganese, and oxygen.Keywords
Hexagonal, YMnO3, Nanoparticles, Citrate sol-gel Process, X-ray Diffraction.References
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