Automatic argon welding of titanium shells with electromagnetic mixing of welding flux

Shelenkov, G. M.; Komarovskii, V. F.; Troyanovskii, V. É.

doi:10.1007/bf01146636

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“…During the employment of Ti and its alloys as structural and architecture relevant materials, these alloys of Ti were usually considered to be joinable by the employment of fusion based welding techniques including gas, arc welding etc. At the same time, distortion of the welded Ti alloys by employment of fusion welding methodologies normally occur owing to the low thermal based conductivity of the Ti [2,3]. In addition to this, Ti and its alloys are extremely reactive in their molten condition and the generation of Ti based oxides, porosities, inclusions etc, in the nugget of the weld zone will certainly result in the fabrication of inferior quality Ti joints possessing degraded mechanical properties [4].…”

Section: Introductionmentioning

confidence: 99%

Optimization of parameters and formulation of numerical model employing GRA–PCA and RSM approach for friction stir welded Ti–6Al–4V alloy joints

Babu S D

et al. 2024

Mater. Res. Express

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In this work, an endeavor was made to determine the impact of the tool’s shoulder diameter, pin profile, rotational and traverse speeds on the mechanical properties of the friction stir welded namely Ti–6Al–4V alloy joints. A total of 21 experiments were carried out based on the central composite design (CCD) concept of response surface methodology (RSM). A quadratic regression based numerical model was formulated to ascertain the relationship amidst the parameters of FSW process and the mechanical properties of the fabricated Ti alloy joints. Analysis of variance (ANOVA) was employed to confirm the importance of parameters and their interactive impacts. Optimized process parameter combinations were ascertained by grey relation based analysis (GRA) was coupled together with principal component analysis (PCA), a hybrid based approach. Single score of GRG based response was determined and GRG scores were ranked for all experiments. 1st rank was attained by the experiment no. 20 possessing a GRG score of 2.9989. Optimized values of 25mm shoulder diameter having a taper cylindrical pin geometry employed at a tool traverse speed of 40 mm/min, rotational speed of 1400 rpm resulted in the generation of flaw free Ti alloy joint possessing a largest tensile strength of 809.8 MPa, yield strength of 778.7 MPa and percentage of elongation of 6.9%. SEM based fractography ofTi alloy joint specimens announced that taper cylindrical pin geometry along with 25m shoulder diameter of employed tool have an inevitable part in generating frictional heat in ideal volumes and a perfect stirring action during FSW process.

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Section: Introductionmentioning

confidence: 99%

Optimization of parameters and formulation of numerical model employing GRA–PCA and RSM approach for friction stir welded Ti–6Al–4V alloy joints

Babu S D

et al. 2024

Mater. Res. Express

View full text Add to dashboard Cite

show abstract

Automatic argon welding of titanium shells with electromagnetic mixing of welding flux

Cited by 1 publication

References 0 publications

Optimization of parameters and formulation of numerical model employing GRA–PCA and RSM approach for friction stir welded Ti–6Al–4V alloy joints

Optimization of parameters and formulation of numerical model employing GRA–PCA and RSM approach for friction stir welded Ti–6Al–4V alloy joints

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