Influence of Shielding Gas on Aluminum Alloy 5083 in Gas Tungsten Arc Welding

Peasura, Prachya; Watanapa, Anucha

doi:10.1016/j.proeng.2012.01.333

Cited by 23 publications

(9 citation statements)

References 1 publication

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“…Experimental results showed that the argon condition provided smaller grain size, suitable size resulting in higher hardness both in weld metal and HAZ. They also indicated that the grain size and precipitation Mg affect the hardness of sample [5].…”

Section: Literature Reviewmentioning

confidence: 99%

Effect of Process Parameter on Mechanical and Metallurgical Properties of Dissimilar Metal Welds Using Gtaw Process

2015

IJAERD

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Section: Literature Reviewmentioning

confidence: 99%

Effect of Process Parameter on Mechanical and Metallurgical Properties of Dissimilar Metal Welds Using Gtaw Process

2015

IJAERD

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“…Газові суміші широко використовуються в різних технологічних процесах фізико технічної обробки. Так, змінюючи склад газового середовища можна в ефективно управляти технологічними характеристиками зварювальних процесів: продуктивністю, величиною втрат електродного металу на розбризкування, формою і механічними властивостями металу шва [1,2]. Також відомо застосування газових сумішей різного складу в процесах лазерної обробки.…”

Section: вступunclassified

Застосування Сопел Надкритичного Витікання Для Швидкісно-Го Вимірювання Об'єму Посудин

Планковський¹,

Шипуль²,

Заклінський³

2020

aktt

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The subject of the study is methods for determining vessel volume with complex shapes. The aim of the study is a development and scientifically substantiate of a method for fast measurement of an internal cavity volume of a vessel having a complex geometric shape in a gaseous medium based on supercritical outflow. The task of the study is the development of a method for calculating the volumes of the gas path components for the previously proposed generator of gas mixtures, which based on the supercritical outflow from intermediate tanks with constant volume, and confirmation of the proposed method capabilities using a simulation of the volume measurement process by the same method. The following results were obtained. It is proposed the method for fast measurement of vessel volume with complex shape based on supercritical flow through nozzles with the predetermined flow rate and dynamic measured pressure. The range of measurement time is substantiated for which, on the one hand, the conditions for suppressing transient processes in the measured vessels after the beginning of the supercritical outflow of the process gas are satisfied, and on the other hand, the conditions for adiabatic outflow are provided. According to the simulation of measuring the volume of a complex-shaped vessel using the proposed method, the accuracy of determining the volume of the vessel was 0.0625% in relation to the CAD system data. To use the proposed method in practice, the measuring equipment should include a reference vessel, and the measurements themselves should be carried out in two stages, using the same gas for filling in both cases. In this case, at the first stage, according to the results of the control measurement when it expires from the reference vessel, the value of the flow coefficient is specified, and at the second stage, when it expires from the measured vessel, the required target volume is determined. The process of direct volume measurement, in this case, lasts up to 1 second, the accuracy of volume determination is expected to be 0.1%.

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“…The liquid metal is assumed Newtonian, its fluid flow remains laminar, and the Boussinesq's approximation is used. The factorial experiment was designed by Prachya [27] to investigate the influence of shielding gas parameter on the mechanical properties and microstructures of heat-affected zone and fusion zone in GTAW of aluminum alloy AA 5083. The result showed that the type of shielding gas and flow rate interaction hardness will affect the mechanical properties and microstructures of HAZ and fusion zone.…”

Section: Governing Equationsmentioning

confidence: 99%

Numerical investigation of thermocapillary-induced deposited shape in fused-coating additive manufacturing process of aluminum alloy

Wei

2018

J. Phys. Commun.

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In varying polarity gas tungsten arc welding (VP-GTAW) based metal fused-coating additive manufacturing (AM), the surface topographies of deposited layer are more complex than conventional welding, therefore, the distribution of the electromagnetic force in molten pool, arc pressure, plasma shear stress and heat flux on thermocapillary-induced deposited shape are not the same as the conventional welding. A three-dimensional numerical model was developed to investigate the transient thermal-fluid behaviors and the shape evolution of deposited layers in fused-coating AM process of aluminum alloys. Various driving forces of thermocapillary-induced melt flow including arc pressure, Lorentz force, arc plasma drag force and surface tension were taken into account in the model. Numerical prediction regarding the solidified shape and size of a single-track deposited layer is compared with the corresponding experimental data, showing that there is a good qualitative agreement between the two, which indicates that the established numerical model is capable of simulating the complex heat and mass transfer phenomena in the VP-GTAW based additive manufacturing. The thermo-physical process in fused-coating additive manufacturing process is systematically analyzed. Trends in deposition width and height with two major process parameters are captured. It is found that the shape of single-track deposited layers is strongly influenced by substrate moving speed. With an increase in the gap height between the substrate and fused-coating head, there are approximate changing trends in the height and width of deposited layers. The parametric study is prime important to understand and control the metal behavior in a layered deposition format.Nomenclature

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Influence of Shielding Gas on Aluminum Alloy 5083 in Gas Tungsten Arc Welding

Cited by 23 publications

References 1 publication

Effect of Process Parameter on Mechanical and Metallurgical Properties of Dissimilar Metal Welds Using Gtaw Process

Effect of Process Parameter on Mechanical and Metallurgical Properties of Dissimilar Metal Welds Using Gtaw Process

Застосування Сопел Надкритичного Витікання Для Швидкісно-Го Вимірювання Об'єму Посудин

Numerical investigation of thermocapillary-induced deposited shape in fused-coating additive manufacturing process of aluminum alloy

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