Effects of latent heat of fusion on thermal processes in laser welding of aluminium alloys

Autor:	Victor A. Karkhin, Maksym Makhutin, V. V. Plochikhine, Hans-Werner Zoch, A. S. Ilin, Hans Josef Pesch, Andrey Prikhodovsky
Rok vydání:	2005
Předmět:	Thermal efficiency Fusion Materials science Enthalpy of fusion Metallurgy Laser beam welding Mechanics Welding Condensed Matter Physics law.invention law Latent heat Thermal Weld pool General Materials Science
Zdroj:	Science and Technology of Welding and Joining. 10:597-603
ISSN:	1743-2936 1362-1718
DOI:	10.1179/174329305x19286
Popis:	Based on the Green's function method, a mathematical model allowing for the latent heat of fusion and solidification is developed to describe the steady state, two-dimensional heat flow during welding of thin plates. It is demonstrated that the latent heat has a pronounced effect on shape and size of the weld pool and mushy zone. The thermal efficiency of base metal fusion by a line heat source η t can exceed 0·4839 considerably if the latent heat is taken into account. It is shown that the known simplified approaches for considering the latent heat can introduce large errors into the estimation of η t. The calculated and experimental weld pool shapes are compared.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::5f330ccc5fea799e66bab7470172978b https://doi.org/10.1179/174329305x19286 Zobrazit plný text záznamu Plný text ve formátu PDF