Abstract

GUZMAN ROMERO, Elís Efraín; FERNANDEZ COLUMBIE, Tomás H.; ALCANTARA BORGES, Dayanis  and  RODRIGUEZ GONZALEZ, Isnel. Effect of angular velocity and pressure in radial friction welding of AA 5754 aluminum alloy. Min. Geol. [online]. 2017, vol.33, n.3, pp. 311-323. ISSN 1993-8012.

The objective of this investigation is to determine the relation between the transformations of phases occurring during the rotational friction welding of AA 5754 12-mm-diameter aluminum alloys. The process was carried out using a 16 K 20 lathe based on joint parameters ranging between 1 200 and 1 400 rev/min with a pressure of 0,9 and 1,9 MPa, respectively. It was determined that the friction temperature decreases as the number of revolutions increases as well as the metallurgical variation both in the thermo-mechanically affected area and in the thermally affected area. The hardness profiles show the increase by the plastic flow effect, metallurgical variations and the existence of precipitates.

Keywords : welding; rotational friction; transformation of phases; micro-structure; precipitates; AA 5754 alloy.

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