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Modeling the Effect of Plate Thickness on Dilution and Bead Height in SAW Process
Objectives: Dilution and bead height model generation for submerged arc welding and variable plate thickness Methods/Statistical Analysis: Central composite design (rotatable) technique used with Design Expert® software. 32 beads on plate specimen welded with submerged arc welding process. Current, voltage, plate thickness, travel speed and nozzle to plate distance taken as variable to identify the direct and interaction effects of these parameters on dilution and bead height. All weld samples cut from the specimen, polished and etched with 2% Nital solution to observe bead profile on high resolution microscope with 10 X image enhancement for quality measurement of bead parameters. Findings: Plate thickness along with other welding parameters affects the bead profile due to change in heat flow conditions. Variable plate thickness model for bead parameters help us to understand that how the changed heat flow conditions affects bead profile when plate thickness changes. Bead height increase with current and reduce with travel speed. The maximum bead height has been observed with 14 mm plate where bead height is observed 2.94 mm at 325 amperes current and 21.25 m/hr of travel speed while minimum is 1.79 mm for 12 mm plate at 250 Ampere current and 22.50 m/hr travel speed. Higher bead height is observed with thicker plate due heat sinking effect in thickness direction. Percentage dilution is affected by plate thickness along with other parameters, especially when we work with faster travel speed. Application/Improvements: Variable plate thickness model for bead height and dilution for Submerged arc welding represented which can be helpful to identify bead characteristics over a wide range of thicknesses for SAW welded carbon steels.
Bead Height, Central Composite Design, Dilution, Plate Thickness, Submerged Arc Welding.
- Kou S. New Jersey: John Willy and Sons, Inc.: Welding Metallurgy, 2nd edition. 2003.
- Lancaster JF. Metallurgy of Welding. Proceedings of the 13th conference on Titanium. 2013; 53.
- Cary HB. Prentice Hall: Modern Arc Welding Technology, 4th edition. 1998. Figure 16. 3D surface graph for percentage dilution at 25 volts for 12 mm thick plate. Design-Expert® Software% Dilution 54.2837.06X1 A: Current (Amp)C: Travel Speed (m/hr)Actual FactorsB: Plate thickness (mm) = 12.00D: Voltage (volts) = 25.00E: NPD (mm) = 20.00 275.00 287.50 300.00 312.50 325.0021.25 21.88 22.50 23.13 23.75 40 44 48 51 55 % Dilution A: Current (Amp) C: Travel Speed (m/hr)
- Gunaraj V, Murugan N. Prediction and comparison of the area of the heat-affected zone for the bead-on-plate and bead-on-joint in submerged arc welding of pipes. Journal of Mater Process Technology. 1999; 95(1-3):246-61. https://doi.org/10.1016/S0924-0136(99)00296-4
- Murugan N, Gunaraj V. Prediction and control of weld bead geometry and shape relationships in submerged arc welding of pipes. Journal of Mater Process Technology. 2005; 168(3):478-87. https://doi.org/10.1016/j.jmatprotec.2005.03.001
- Reeta W, Pandey S. Mathematical models for prediction of weld bead geometry in GMAW of aluminium alloy 7005. Atlanta, Georgia, USA: ASME Early Career Technical Conference ASME ECTC. 2010; p. 80-6.
- Shen S, Oguocha IN a. NA, Yannacopoulos S. Effect of heat input on weld bead geometry of submerged arc welded ASTM A709 Grade 50 steel joints. Journal of Mater Process Technology. 2012; 212(1):286-94. https://doi.org/10.1016/j.jmatprotec.2011.09.013
- OM H, Pandey S. Effect of heat input on dilution and heat affected zone in submerged arc welding process. Sadhana. 2013 Dec; 38:1369-91. https://doi.org/10.1007/s12046-013-0182-9
- Tamang S, Singh NK. Optimisation of output parameter of submerged arc welding by response. New Delhi: 17th ISME Conference IIT Delhi. 2016; p. 1-6.
- Adak DK, Mukherjee M, Pal TK. Development of a Direct Correlation of Bead Geometry, Grain Size and HAZ Width with the GMAW Process Parameters on Bead-on-plate Welds of Mild Steel. Transaction of the Indian Institute of Metals. 2015; 68(5):839-49. https://doi.org/10.1007/s12666-015-0518-8
- Sharma A, Arora N, Mishra BK. Mathematical model of bead profile in high deposition welds. Journal of Mater Process Technology. 2015; 220:65-75. https://doi.org/10.1016/j.jmatprotec.2015.01.009
- Rosenthal D. Mathematical theory of heat distribution during welding and cutting. Weld Journal. 1941; 20(5):220-25.
- Poorhaydari K, Patchett BM, Ivey DG, Poorhaydari. Estimation of Cooling Rate in the Welding of Plates with Intermediate Thickness. Weld Journal. 2005 Oct; p. 149-55.
- Pimenta G, Bastian F. Influence of Plate Thickness on the Mechanical Properties of Welded Joints Subjected to Long-Term Postweld Heat Treatments. Journal of Mater Engineering Perform. 2002 Apr; 11:130-37. https://doi.org/10.1361/105994902770344187
- Montgomery DC. Wiley: Design and Analysis of Experiments. 2008.
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