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Manjunath, A.
- Interpulse Tig Welding of Titanium Alloy (TI-6Al-4V)
Abstract Views :678 |
PDF Views:9
Authors
Affiliations
1 CMR Technical Campus, JNTU, Hyderabad, Telangana, IN
2 Gas Turbine Research Establishment, DRDO, Bangalore-93, IN
1 CMR Technical Campus, JNTU, Hyderabad, Telangana, IN
2 Gas Turbine Research Establishment, DRDO, Bangalore-93, IN
Source
Indian Welding Journal, Vol 50, No 4 (2017), Pagination: 56-71Abstract
The unique properties of Titanium alloy (Ti-6Al-4V) like high strength to weight ratio, low density has made the alloy very useful material in the manufacturing of compressor blades, casings and other structural components of the gas turbine engines. The TIG welding is an arc welding process widely used in the fabrication of gas turbine engine components and its assembly. The Interpulse technique is the modified version of TIG welding process. Due to magnetic constriction and high frequency modulation of current in the interpulse technique, the arc is getting constricted which further minimizes the net heat input. In this experiment response surface optimization technique has been adopted to evaluate the effects of the input variables (main current, delta current, travel speed), on output responses (weld bead width, reinforcement height and area, penetration height and area and HAZ area). The outcome shall be beneficial in selecting suitable parameters to obtain the required shape and quality of the weld bead geometry.Keywords
Interpulse TIG Welding, Titanium Alloy, Ti-6Al-4V, Weld Bead Width.
References
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- Leary RK, Merson E and Birmingham K (2010); Microstructural and microtextural analysis of interpulse GTCAW welds in Cp-Ti and Ti-6Al-4V, Materials Science and Engineering A, 527, pp.7934-7705.
- Experimental Investigation of TIG Welding Ti-6Al-4V by using different supply mixture ratio of Ar-He Shielding Gas
Abstract Views :271 |
PDF Views:3
Authors
Affiliations
1 GTRE, Defence Research and Development Organisation, Bangalore - 560 093, IN
2 Production Engineering Department, NITT, Tiruchirappalli - 620 015, IN
1 GTRE, Defence Research and Development Organisation, Bangalore - 560 093, IN
2 Production Engineering Department, NITT, Tiruchirappalli - 620 015, IN
Source
Indian Welding Journal, Vol 55, No 1 (2022), Pagination: 42-47Abstract
Ti-6Al-4V is a material that is extensively used in the gas turbine application. The fabrication of the assemblies of the gas turbine made up of Ti-6Al-4V involves Tungsten Inert Gas (TIG) welding. It is preferred to have a minimal bead width for minimal distortion with full penetration welds meeting the required weld quality as per aerospace weld standards. The primary purging gas which is usually employed during TIG welding is inert argon gas. In this present study argon and helium gas mixture was adopted as shielding gas. Taguchi design of experiment has been employed involving L9 orthogonal array with 3 parameters and 3 levels. The aim of the study was to understand the effect of the weld parameters and Ar-He gas mix ratio on the bead width of the welds. The obtained results were analyzed using ANOVA and found the welding current having significant effect on bead width followed by welding speed and Ar-He gas mix. A linear regression mathematical model is generated of the response variable. In order to ascertain the optimized parameters confirmation tests are conducted and obtained results are correlated. Macroscopic images do not show any crack or porosity and thereby confirm that defect free welds can be produced within the range of process parameters.Keywords
TIG welding; Ti-6Al-4V; Ar-He gas mix; Weld bead; Taguchi; orthogonal array.References
- Veiga C, Davim JP and Loureiro AJR (2012); Properties and Applications of Titanium Alloys: A Brief Properties and Applications of Titanium Alloys, Advanced Material Science, 32, pp. 133-148.
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- Caiazzo F, Alfieri V, Astarita A, Squillace A and Barbieri G (2017); Investigation on laser welding of Ti-6Al-4V plates in corner joint, Advances in Mechanical Engineering, 9(1), pp. 1-9.
- Mishra D (2017); Response Surface Optimization of Interpulse TIG welding for the Optimum Weld bead of Ti-6Al-4V, International Journal for research in Applied Science & Engineering Technology, 5(IX).
- Devendranath R K, Varma V, Prasad M, Rajan ND and Shanmugam NS (2018); Effect of activated flux on penetration depth, microstructure and mechanical properties of Ti-6Al-4V TIG welds, Journal of Materials Processing Tech, 261, pp. 233-241.