2010
DOI: 10.1016/j.ijthermalsci.2010.01.021
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Optimal parameters for pulsed gas tungsten arc welding in partially and fully penetrated weld pools

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Cited by 58 publications
(25 citation statements)
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“…Both width and depth of fusion reveal a good correlation with R 2 >0.95 with a slight underestimation of z max (slope< 1) and slight overestimation of w max (slope>1). The comparison of the results for different laser powers was Ambient temperature T 0 293 K -Latent heat of fusion L f 247·10 3 J/(kg) [35] Latent heat of vaporization L v 6.25·10 5 J/kg [36] Specific heat, solid C pS 502 J/(kg·K) [31] Specific heat, liquid C pL 620 J/(kg·K) [35] Specific heat, vapor C pv 747.14 J/(kg·K) [31] Density, liquid ρ l 6350 kg/m 3 [28] Density, solid ρ s 7500 kg/m 3 [28] Liquid-state thermal conductivity k l 43 W/(m·K) [37] Solid-state thermal conductivity k s 40 W/(m·K) - [38] obtained for constant laser scanning speed of 2 mm/s and mass flow of 2.5 g/min as shown in Fig. 6.…”
Section: Comparison Between Simulation and Experimental Resultsmentioning
confidence: 99%
“…Both width and depth of fusion reveal a good correlation with R 2 >0.95 with a slight underestimation of z max (slope< 1) and slight overestimation of w max (slope>1). The comparison of the results for different laser powers was Ambient temperature T 0 293 K -Latent heat of fusion L f 247·10 3 J/(kg) [35] Latent heat of vaporization L v 6.25·10 5 J/kg [36] Specific heat, solid C pS 502 J/(kg·K) [31] Specific heat, liquid C pL 620 J/(kg·K) [35] Specific heat, vapor C pv 747.14 J/(kg·K) [31] Density, liquid ρ l 6350 kg/m 3 [28] Density, solid ρ s 7500 kg/m 3 [28] Liquid-state thermal conductivity k l 43 W/(m·K) [37] Solid-state thermal conductivity k s 40 W/(m·K) - [38] obtained for constant laser scanning speed of 2 mm/s and mass flow of 2.5 g/min as shown in Fig. 6.…”
Section: Comparison Between Simulation and Experimental Resultsmentioning
confidence: 99%
“…Many researchers studied the weld pool dynamics and weld bead formation with experimental [8][9][10][11][12] or numerical [13][14][15][16][17][18][19][20][21][22][23][24] methods. However, it is rather difficult to experimentally measure the parameters such as temperature and velocity due to the nontransparency of base metal and the high-temperature arc plasma.…”
Section: Introductionmentioning
confidence: 99%
“…Isto pode levar ao uso ineficiente da pulsação da corrente no que diz respeito à obtenção de uma poça de fusão dimensionalmente adequada, refletindo assim, nas características dimensionais do cordão de solda, bem como na produtividade ao ser considerado a velocidade de soldagem. Neste contexto, embora seja possível encontrar na literatura produzida nas últimas décadas trabalhos [2,[17][18][19][20][21][22][23] cuja abordagem está na influência das variáveis de soldagem sobre as características do cordão de solda, são limitados os trabalhos que explorem critérios que auxiliem na determinação concatenada do conjunto de parâmetros da soldagem TIG pulsada. Diante disso, o presente trabalho tem por objetivo apresentar um roteiro cujo intuito é o de suprir a necessidade prática de se estabelecer critérios que auxiliem a determinação das variáveis da soldagem TIG pulsada.…”
Section: Introductionunclassified