iosr-JMCE   Volume-16 ~ Issue-5 ~ Sep-Oct 2019

Abstract: In the present work, the optimization of welding parameters (Welding Current, Welding Voltage, and Electrode feed Rate) for SS 304 is investigated. Taguchi method is used to formulate the experimental design. A total number of 9 experimental runs have been designed using L9 orthogonal array. Stainless steel of thickness 3mm was selected as work piece material for the present experiments. The gases used during this welding process were mixture of Argon (25%) and helium (75%). 18 plates of 3mm thickness were taken and then coalescence is produced by using GMAW to form 9 butt welded plates. The required dimension welding samples for mechanical testing is............

Key words: SS 304, Taguchi method, Coalescence, ANOVA, Tensile strength, Brinell hardness, GMAW

[1]. Tarng Y. S., Juang S. C. & Chang C. H., (2002) "The Use of Grey-Based Taguchi Methods to Determine Submerged Arc Welding Process Parameters in Hard-Facing", Journal of Material Processing Technology, vol.128, pp. 1-6.
[2]. Mai, T. A., & Spowage, A. C. (2004) "Characterisation of Dissimilar Joints in Laser Welding of Steel–Kovar, Copper–Steel and Copper– Aluminium", Materials Science and Engineering, vol.374, pp. 224–233.
[3]. James M. N, G. Mills, (2008) "Residual stress and strain in MIG butt welds in 5083-H321 aluminium As-welded and fatigue cycled" International Journal of Fatigue, 31volume, pp. 28-31.
[4]. Datta S, Bandyopadhyay A, Kumar P. P., (2008) "Grey-based Taguchi method for optimization of bead geometry in submerged arc bead-on-plate welding" Internatonal Journal of Advanced Manufacturing & Technology, vol. 39 pp 1136–1143
[5]. Rai R, Palmer T. A, Elmer J. W & Debroy T, (2009) "Heat Transfer and Fluid Flow during Electron Beam Welding of 304L Stainless Steel Alloy", Welding Journal, vol.88, pp. 1-19..

Abstract: In the present work, the joining of dissimilar AA5086 and H32-AA6061 aluminium plates of 5mm thickness was carried out by friction stir welding technique. The present work shows that dissimilar alloy materials have highest effect on mechanical properties of the welded specimen taken from welded zone. They were tested for mechanical properties such as tensile strength. Effect of tool pin profile, feed rate and spindle speed on tensile strength of welded joints were investigated. The experimental results were analysed with analysis of variance (ANOVA), which is used to investigate the influence of parameters consider for the study..

Key words: Friction stir welding, tensile strength, ANOVA technique

[1]. Khany. S. E., Mehdi. S. N., Ahmed. G. M. S. (2015) "An Analytical Study of Dissimilar Materials Joint Using Friction Welding and its Application", International Journal of Scientific and Research Publications, Volume 5, Issue 2, PP: 12-20.
[2]. Raktate Omesh, Dhananjay Dolas (2016), "Optimization of Process Parameters of Friction Stir Welding– Critical Review", International Advanced Research Journal in Science, Engineering and Technology, Vol. 3, Issue 1, PP: 235-242.
[3]. Bhate. S. K (2016) "A Literature Review of Research on Rotary Friction Welding", International Journal of Innovative Technology and Research, Volume No.4, Issue No.1, PP: 2601-2612.

[4]. Tuncel. O., Aydin. H., Tutar. M & Bayram. A. (2016) "Mechanical performance of friction stir spot welded AA6082-T6 sheets", International Journal of Mechanical and Production Engineering, Vol 4, Issue 1, PP114–118
[5]. Verma. G., Kumar. S., Bundel. B. R. (2016), "A Research Paper on the Comparison of Weld Strength of Friction Welding of Different Materials At Two Different RPM", International Journal of Mechanical Engineering and Technology, Volume 7, Issue 6, PP:123–127..

Abstract: The recurrent premature failures of public infrastructure which render most constructed facilities structurally deficient and functionally obsolete require urgent attention and the degree of uncertainty or dispersion in the size geometry of local and imported bars is very fundamental to the development of reliable standard of practice for building and civil engineering industry. From findings, the degree of uncertainty in the geometric size of local bars was six times higher than the imported bars, while the degree of uncertainty in bar sizes was smaller in Lagos than that of Ibadan. Also, weekly durability assessment of the rebar specimens were evaluated to determine the mass loss and the mechanical properties when fully immersed in distilled water and 5% solution of H2SO4, HCl, NaOH, Na2SO4 in soluble water over a period of six weeks. The severity of aqueous solutions on rebar strength was in the order HCl> H2SO4 >NaOH> H2O > Na2SO4 and HCl> H2SO4>NaOH> Na2SO4> H2O for imported and local respectively.

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