Numerical Investigation on Molten Pool Dynamics and Defect Formation in Electron Beam Welding of Aluminum Alloy

Yang, Ziyou; Fang, Yuchao; He, Jiaojie

doi:10.1007/s11665-020-05111-2

Cited by 23 publications

(6 citation statements)

References 39 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…It is important to note that both considered welded joints exhibit large pores at the center of the seam. As it is known, the process of electron beam welding incorporates highly uneven fluid dynamics processes due to highly inhomogeneous thermal fields throughout the welding seam [41,42]. Previous research also indicates that the highest observed thermal gradients during electron beam welding are at the top of the weld seam during the process, due to the higher dissipation of kinetic energy in the first stages of the penetration of the electrons [43].…”

Section: Resultsmentioning

confidence: 99%

Welding of Ti6Al4V and Al6082-T6 Alloys by a Scanning Electron Beam

Anchev,

Kaisheva,

Kotlarski

et al. 2023

Metals

View full text Add to dashboard Cite

This work presents the results of an investigation into the influence of beam offset on the structure and mechanical properties of electron-beam-welded joints between Ti6Al4V and Al6082-T6 alloys. The experimental procedure involved the use of specific technological conditions: an accelerating voltage of 60 kV, an electron beam current of 35 mA, a specimen motion speed of 10 mm/s, and a beam offset of 0.5 mm towards both alloys, as well as welding without an offset. The phase composition of the joints was analyzed using X-ray diffraction (XRD). The microstructure and chemical composition of the seams were studied by scanning electron microscopy (SEM) and energy-dispersive X-ray spectroscopy (EDX). The results obtained for the structure of the joints show that the beam offset has a significant influence on the structure. The microhardness was studied by means of the Vickers method. The results for the microstructure showed that the welding procedure without offset and with an offset towards the Ti alloy leads to inhomogeneous welded joints with a significant amount of intermetallics. The offset towards the Al alloy leads to the formation of a narrow area of TiAl3 phase. The measured microhardness corresponds to the increased amount of intermetallics in the case of offset towards the Ti alloy, with which the highest values were presented (about 58% higher than with Ti6Al4V plate). The results obtained for tensile properties show that the offset to the Al6082-T6 alloy leads to the highest values of tensile strength (TS) and yield strength (YS), which are twice higher than in welding without offsetting of the electron beam.

show abstract

Section: Resultsmentioning

confidence: 99%

Welding of Ti6Al4V and Al6082-T6 Alloys by a Scanning Electron Beam

Anchev,

Kaisheva,

Kotlarski

et al. 2023

Metals

View full text Add to dashboard Cite

show abstract

“…The root of the keyhole was too small and tended to close more quickly so that the filler metal cannot fill the root efficiently. Moreover, under the fluctuation of the molten pool, there was a closed void in the root of the molten pool [30,31]. The metal vapours were hindered, and cannot escape from the bottom of molten pool.…”

Section: Resultsmentioning

confidence: 99%

Influencing mechanisms of weld root tip on microstructure and mechanical properties of electron beam welded joints of titanium alloy thick plates

Li,

Wu,

Zhao

et al. 2023

Science and Technology of Welding and Joining

View full text Add to dashboard Cite

The welding of titanium alloy thick plates often formed a narrow weld seam in the weld root, named as 'weld root tip', because of insufficient fusion, which could reduce the joint properties. In this study, 30 mm-thick Ti-5Al-5Mo-5V-1Cr-1Fe alloy was butt welded via electron beam welding to reveal the influencing mechanisms of the weld root tip on joint microstructure and mechanical properties. The subparallel or parallel weld seam with the weld angles of 0°-3°between the centre line and edge of the fusion zone removed the weld root tip, achieving almost the same mechanical properties with those of the welding zone.

show abstract

“…The 4043 electrode wire from the 4xxx group (5% Si) was used for welding busduct elements welding. Numerical analysis related to heat flow or welding stresses in aluminum alloys has been reported in the literature, but never related to the use of the micro-jet process in welding [13][14][15]. In the article, it was decided to subject the results obtained in real welding to numerical analysis in order to validate and verify the obtained results.…”

Section: Methodsmentioning

confidence: 99%

Validation of parameters selection of aluminium busducts welding with micro-jet cooling by using Method of Fundamental Solutions

Szczucka-Lasota,

Uściłowska,

Węgrzyn

et al. 2023

Preprint

View full text Add to dashboard Cite

Aluminum alloys are lightweight and resistant to corrosion in the natural environment, which is why they are a proper material for responsible structures (in the civil engineering structures, automotive industry, electric conductors). Purpose of the paper was coupling MIG (Metal Inert Gas) welding process with parameters of micro-jet cooling just after aluminium busducts welding. There are given the main information about parameters of aluminum welding with the micro-jet cooling process. There were also put down information about the influence of various micro-jet parameters on the metallographic structure. After that, there were tested metallographic and some physical properties of welding structures (mechanical resistance, electrical conductivity). Welding with micro-jet cooling could be treated as a very promising process with high industrial applications. In addition, using Method of Fundamental Solutions, the influence of the heat flow process in WMD (weld metal deposit) after welding with micro-jet cooling was checked. The effect of micro-jet cooling on the grain refinement of weld metal deposit was carefully investigated. Controlled influence of the heat flow process in the welded joint will allow for proper selection of micro-jet cooling parameters. The article focuses on the mechanical and especially electrical properties of busducts welds made with innovative micro-jet cooling.

show abstract

Numerical Investigation on Molten Pool Dynamics and Defect Formation in Electron Beam Welding of Aluminum Alloy

Cited by 23 publications

References 39 publications

Welding of Ti6Al4V and Al6082-T6 Alloys by a Scanning Electron Beam

Welding of Ti6Al4V and Al6082-T6 Alloys by a Scanning Electron Beam

Influencing mechanisms of weld root tip on microstructure and mechanical properties of electron beam welded joints of titanium alloy thick plates

Validation of parameters selection of aluminium busducts welding with micro-jet cooling by using Method of Fundamental Solutions

Contact Info

Product

Resources

About