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Keywords

SPIF, Laser welding, Similar welded joints, Dissimilar welded joints, Thinning percentage

Document Type

Article

Abstract

The welding of different Aluminum sheets are useful in applications like fan blades, chemical equipment, and naval structures where different regions of a part have different requirements. One of the most famous ways to weld aluminum sheets was friction stir welding method which is difficult to control due to its many variables; so, the novelty of this work is to weld the aluminum sheets by laser technique which distinguishes by speed and ease of implementation and then forming the welded sheets by single point incremental forming Which has not been addressed by any study so far. The aim of this paper is to weld the aluminum alloys sheets by laser technique and study the effect of forming angles during single point incremental forming method on hardness, wall thinning percentage and surface roughness of welded aluminum sheets. Fiber laser welding was used for joining similar (Al-1100+Al-1100) and dissimilar (Al-1100+Al-6061) aluminum alloy sheets. Single point incremental forming method was used to form the truncated cones of welded sheets under different forming angles (25°, 30°, 35°, 40°, 45°) with following process parameters: spindle speeds (N = 300 rpm), vertical step depth (H = 0.5 mm), feed rate (F = 300 mm/min) with spiral tool path and with oil lubricant. The hardness test and thinning percentage were conducted for both welded samples. The results showed that hardness decreased in the heat affected zone for Al-6061 and the heat affected zone of Al-6061 was much wider than Al-1100. It was also found that the hardness and wall thinning percentage increased as the forming angle increased for both welded samples as well as the wall thinning percentage of Al-1100 sheets are higher than Al-6061 sheets. Regarding the comparative values, it was found that the yield stress and ultimate strength of dissimilar welded sheets is higher than the similar welded sheets.

DOI

10.30684/2412-0758.1544

First Page

1

Last Page

19

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