The chemistry of TIG weld bead formation

Modenesi, Paulo José

doi:10.1080/09507116.2014.932990

Cited by 17 publications

(6 citation statements)

References 41 publications

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“…382 Molto chiara è poi l'esposizione della teoria dello spostamento ad opera di L. Beschi 383 e successivamente di N. Modenesi. 384 Diversamente M. Korres sembra addirittura tornare a Curtius 385 o a Körte 386 quando scrive che già la dedica originaria sarebbe stata posta "just outside the western gate of the still-preserved Mycenaean walls"; 387 più prudentemente J.M. Hurwit ammette che non conosciamo l'originaria collocazione della quadriga, ma riprende comunque la teoria dello spostamento, 388 come del resto fa C.M.…”

Section: 220) Le Due Tesi Più Diffuse Nel Dibattito Attualeunclassified

La dedica degli Ateniesi per la vittoria su Beoti e Calcidesi del 506 a.C. (IG I3 501) e la sua collocazione topografica

Berti¹

2013

MEMO

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The monument - a quadriga - the Athenians dedicated on the Acropolis for their victory over the Boeotians and the Chalcidians in 506 B.C. has always aroused great interest, both in antiquity and down to the present day: not only is the monument well attested by ancient sources, but it was also restored around the middle of the 5th century, as witnessed by inscriptions; consequently, the 6th century original and the 5th century restoration have been the subject of a long scholarly debate. This paper focuses on the topographical context of the victory monument and that of its restoration, trying to ascertain where they were dedicated. Accordingly, modern theories are critically reviewed and ancient sources thoroughly examined. The latter, together with epigraphical, religious and political reasons, suggest that the original quadriga and its restoration were erected on the same site inside the Acropolis.

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Section: 220) Le Due Tesi Più Diffuse Nel Dibattito Attualeunclassified

La dedica degli Ateniesi per la vittoria su Beoti e Calcidesi del 506 a.C. (IG I3 501) e la sua collocazione topografica

Berti¹

2013

MEMO

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“…The presence of surface active elements in the flux affects the surface tension gradient ( γ/ T, where γ is the surface tension and T is the temperature) that determines the direction of flow of molten metal in the weld pool, i.e., Marangoni convection (Vidyarthy and Dwivedi 2016;Marangoni 1865). Without the flux, the surface tension gradient is negative which means that the molten metal flows from centre to the periphery of weld pool, creating an outward flow that leads to shallow and wide weld bead (Modenesi 2015;Chakravarthy et al 2019;Neethu and Chakravarthy 2020). The surface active elements change γ/ T from negative to positive, so that the molten metal flows from periphery to the centre of weld pool, leading to a narrow and deep weld pool.…”

Section: Introductionmentioning

confidence: 99%

Optimisation of Flux and Weld Parameters During Flux Bounded Tungsten Inert Gas Welding (FBTIG) of Nickel Based Superalloy Inconel 600

Neelima

Agilan

Saravanan

et al. 2021

Trans Indian Natl. Acad. Eng.

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Superalloys are used in the strategic sectors of aerospace, defence and nuclear in view of their high specific strength at elevated temperatures, good weldability and excellent oxidation resistance. Inconel 600 is a nickel-chromium alloy with good oxidation resistance at higher temperatures and resistance in carburizing and chloride containing environments. Tungsten inert gas (TIG) welding is the most versatile fabrication process used due to its efficiency and high level of process control. However, the depth of penetration obtained in the weld joint is quite low making multi-pass welding inevitable for thicksection welding. To improve depth of penetration of TIG welded joints, flux bounded tungsten inert gas (FBTIG) welding was developed, that uses thin layer of activating flux on top of the surface of the workpiece, by maintaining gap along the weld line. The present work focuses on the effect of nature of flux and flux gap on the weld bead geometry and mechanical properties of FBTIG welded Inconel 600 alloy. Optimization of weld and flux parameters was carried out through bead-onplate welding and butt weld joints of Inconel 600 was fabricated using the optimized parameters. Radiographically qualified aerospace quality welds were fabricated and depth of penetration has increased three times for FBTIG welds coated with SiO 2 flux using flux gap of 2.5 mm. The room-temperature tensile strength of FBTIG weldments is comparable to that of TIG welds and it was concluded that single-pass FBTIG welding can replace multi-pass TIG welding, to join thicker sections of Inconel 600.

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“…Weld pool is generated by part of the heat produced by the electric arc [5]. The welding area near the pool is protected by inert gases [6][7][8]. When modified to increase the depth of penetration and productivity with activating fluxes, TIG is called activated TIG (ATIG).…”

Section: Introductionmentioning

confidence: 99%

Bulletin of the Polish Academy of Sciences: Technical Sciences

Kumar,

Vettivel,

Kumar Kansal

2021

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Activated tungsten inert gas (ATIG) welding has a good depth of penetration (DOP) as compared to the conventional tungsten inert gas (TIG) welding. This paper is mainly focused on ATIG characterization and mechanical behavior of aluminum alloy (AA) 6063-T6 using SiO 2 flux. The characterization of the base material (BM), fusion zone (FZ), heat affected zone (HAZ) and, partially melted zone is carried out using the suitable characterization methods. The weld quality is characterized using ultrasonic-assisted non-destructive evaluation. A-scan result confirms that the ATIG welded samples have more DOP and less bead width as compared to conventional TIG. The recorded tensile strength of ATIG with SiO 2 is better than the conventional TIG welding. The failure mode is ductile for ATIG welding with larger fracture edges and is brittle in the case of conventional TIG welding.

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The chemistry of TIG weld bead formation

Cited by 17 publications

References 41 publications

La dedica degli Ateniesi per la vittoria su Beoti e Calcidesi del 506 a.C. (IG I3 501) e la sua collocazione topografica

La dedica degli Ateniesi per la vittoria su Beoti e Calcidesi del 506 a.C. (IG I3 501) e la sua collocazione topografica

Optimisation of Flux and Weld Parameters During Flux Bounded Tungsten Inert Gas Welding (FBTIG) of Nickel Based Superalloy Inconel 600

Bulletin of the Polish Academy of Sciences: Technical Sciences

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