Experimental investigations and numerical prediction on the effect of shielding area and post flow time in the GTAW of CP Ti sheets
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In this study, bead on plate (BoP) trials are conducted on 2-mm thick commercially pure titanium (CP Ti) sheets by gas tungsten arc welding (GTAW) process. Welding current (75–105 A) and joining speed (250–300 mm/min) are taken as the variables. In the weld samples’ appearance of the surface, colorizations are noticed for understanding the role of shielding gas. BoP trials are subjected to metallographic examination to measure weld profiles. These measured values are fed as input for the Goldak double ellipsoidal model to performing the GTAW process. For BoP trials, temperature profile and Iso-surface contours along the moving heat source direction are taken at various time intervals. From the temperature history, shielding area and post flow time are identified. A shielding arrangement is fabricated and implemented based on these bead profile and temperature profile history. After the successful fabrication of shielding arrangement, experimental butt joints are made by GTAW process to verify the efficiency of shielding arrangement. Bead profile of experimentally fabricated 1.6-mm and 2-mm butt joints are compared and verified against the finite element model results. Moreover, cupping test is conducted to analyze the ductility of the joints. The maximum elongation of 96.10% is measured for 1.6-mm face out joints from cupping test.
KeywordsGTAW process Weld profile Welding simulation Shielding arrangements Erichsen cupping test
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- 4.Devendranath Ramkumar K, Mishra D, Ganesh Raj B, Vignesh MK, Thiruvengatam G, Sudharshan SP, Arivazhagan N, Sivashanmugam N, Rabel AM (2015) Effect of optimal weld parameters in the microstructure and mechanical properties of autogeneous gas tungsten arc weldments of super-duplex stainless steel UNS S32750. Mater Des 66:356–365. https://doi.org/10.1016/j.matdes.2014.10.084. CrossRefGoogle Scholar
- 9.Hashemzadeh M, Chen BQ, Guedes Soares C (2014) Comparison between different heat source types in thin-plate welding simulation. In: Guedes Soares C, Lopez Pena F (eds) Developments in maritime transportation and exploitation of sea resources. Taylor & Francis Group, London, pp 329–336Google Scholar
- 12.Perzyński K, Rauch Ł, Szeliga D, Rońda J, Pietrzyk M (2010) The computer system for design of the TIG welding operation. J Mach Eng 10:61–67Google Scholar
- 17.Jegadeesan K, Elsen R (2016) Empirical and finite element prediction and validation of weld bead profile generated during TIG welding process. Global Journal of Pure and Applied Mathematics (GJPAM) 12(4):15–20Google Scholar
- 21.Danielson P, Wilson R, Alman D (2004) Microstructure of titanium welds. Adv Mater Process 161(2):39–42Google Scholar
- 23.Stenbacka N, Choquet I, Hurtig K (2012) Review of arc efficiency values for gas tungsten arc welding. In: IIW Commission IV-XII-SG212, Intermediate Meeting. BAM, Berlin, pp 1–21Google Scholar
- 26.Aleksander APL (2012) Laser welding of titanium alloy Ti6Al4V using a disk laser. MTM J 7:53–56Google Scholar