A study on laser cleaning and pulsed gas tungsten arc welding of Ti–3Al–2.5V alloy tubes

Kumar, Aniruddha; Sapp, Mark; Vincelli, Jay; Gupta, Mool C.

doi:10.1016/j.jmatprotec.2009.08.017

Cited by 57 publications

(14 citation statements)

References 15 publications

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“…There are many factors that influence welding resulting in imperfections that will affect hygienic performance. Some of the aspects are discussed in the literature (5,17,32,35,(37)(38)(39)42,(44)(45)(46)(47)(48) and include:…”

Section: Welding Imperfection Concerns Affecting Hygienic Performancementioning

confidence: 99%

The impact of pipe geometry variations on hygiene and success of orbital welding of brewing industry equipment

2017

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Brewery industry processing plants are made-up of tanks, heat exchangers and columns, which are factory-built, interconnected by thin-walled pipes and bends, assembled together on-site. However, pipes are inaccessible from inside so onsite welding is more difficult to control, leading to poor or inadequate welded joints that can compromise product quality for correctly designed plants. One factor leading to poor welds is pipe geometry as pipes are manufactured to outer diameter (OD), wall thickness and ovality tolerances that affect the alignment of pipe ends. A mathematical algorithm was developed to assess interconnecting pipes and bends from a brewery fabrication site to achieve a minimum of 80% area overlap around the pipe circumference. The 80% was simply a reference point based on a 90% overlap ±10%. 316 L stainless steel pipes of different OD were tested together with 53 mm OD 90°elbows. It was discovered that well-performing welds were difficult to achieve with random orientation of pipes. Better results were achieved by aligning major axes of pipes as there was an increase from 51 to 91% after major axis alignment on welds for straight pipes. There was an increase from 22 to 59% and from 58 to 85% for manufacturers 1 and 2, respectively, for straight pipes-to-bends welds. The higher chances of success for manufacturer 2 were attributed to better OD, wall thickness and ovality control. Whilst the welder is unable to control manufacturer tolerances, they are able to manage orientation of pipes to achieve better welds.

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Section: Welding Imperfection Concerns Affecting Hygienic Performancementioning

confidence: 99%

The impact of pipe geometry variations on hygiene and success of orbital welding of brewing industry equipment

2017

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“…Aniruth et al, [2] discussed about the study on laser cleaning and pulsed gas tungsten arc welding of Ti-3Al-2.5V alloy tubes, Welding of laser-cleaned samples show excellent weld quality. G.Lothongkum et al [4] discussed the Study on the effects of pulsed TIG welding parameters on delta-ferrite content, shape factor and bead quality in orbital welding of AISI 316L stainless steel plate, because of the high nitrogen content of the cover gas and lowest pulse currents compared to all other welding positions.…”

Section: Literature Surveymentioning

confidence: 99%

Parametric Optimisation of Pulsed – Tig Welding Process in Butt Joining of 304l Austenitic Stainless Steel Sheets

.¹

2014

IJRET

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“…Also, manual cleaning methods tend to be less consistent than automated solutions. To overcome the problems with existing cleaning methods, the use of laser irradiation to clean the material has been explored by many researchers [2][3][4][5][6][7]. Laser cleaning processes have been found to offer advantages including process automation, remote control, high processing speed per component, dry and importantly, more environmentally friendly processing [1,3,[7][8][9].…”

Section: Introductionmentioning

confidence: 99%

Numerical Simulation of Excimer Laser Cleaning of Film and Particle Contaminants

Marimuthu

Mhich²,

Молчан

et al. 2013

Journal of Heat Transfer

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Laser cleaning is a promising surface preparation technique for applications in high value manufacturing industries. However, understanding the effects of laser processing parameters on various types of contaminants and substrates, is vital to achieve the required cleaning efficacy and quality. In this paper, a two-dimensional transient numerical simulation was carried out to study the material ablation characteristics and substrate thermal effects in laser cleaning of aerospace alloys. Element birth and death method was employed to track the contaminant removal on the surface of the material. The result shows that contaminant ablation increases with laser power and number of pulses. The finite element method (FEM) model is capable enough to predict the optimum number of pulses and laser power required to remove various contaminants. Based on the simulation results, the mechanism of the excimer laser cleaning is proposed. Thus, the use of numerical simulation can be faster and cheaper method of establishing the optimum laser cleaning window and reducing the number of experimental tests.

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A study on laser cleaning and pulsed gas tungsten arc welding of Ti–3Al–2.5V alloy tubes

Cited by 57 publications

References 15 publications

The impact of pipe geometry variations on hygiene and success of orbital welding of brewing industry equipment

The impact of pipe geometry variations on hygiene and success of orbital welding of brewing industry equipment

Parametric Optimisation of Pulsed – Tig Welding Process in Butt Joining of 304l Austenitic Stainless Steel Sheets

Numerical Simulation of Excimer Laser Cleaning of Film and Particle Contaminants

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