This paper presents the experimental and numerical results of the influence of dwell time (30, 60, 90 s), down force (2450, 4900, 7350 N), and rotational speed (1000, 1500, 2000 RPM) on microstructure, microhardness, and material flow during solid-state welding. Probeless friction stir spot welding (P-FSSW) with a flat tool shoulder was assisted to form a metal compound of AA2024, AA6082, and AA5754 aluminium plates with different thicknesses in lap configuration. The analysis of the experimental data and numerical results showed that down force had a significant influence on the material flow and the quality of the welds. High friction energy, and subsequent intensive material flow, promoted the vortexes formation, which improve metals mixing and grain refinements.
Numerical and experimental investigation of probeless friction stir spot welding of a multilayer aluminium alloy compound / Contuzzi, N.; Rashkovets, M.; Casalino, G.. - In: SCIENCE AND TECHNOLOGY OF WELDING AND JOINING. - ISSN 1362-1718. - 28:8(2023), pp. 653-661. [10.1080/13621718.2023.2193460]
Numerical and experimental investigation of probeless friction stir spot welding of a multilayer aluminium alloy compound
Contuzzi N.
Writing – Original Draft Preparation
;Rashkovets M.Writing – Original Draft Preparation
;Casalino G.Supervision
2023-01-01
Abstract
This paper presents the experimental and numerical results of the influence of dwell time (30, 60, 90 s), down force (2450, 4900, 7350 N), and rotational speed (1000, 1500, 2000 RPM) on microstructure, microhardness, and material flow during solid-state welding. Probeless friction stir spot welding (P-FSSW) with a flat tool shoulder was assisted to form a metal compound of AA2024, AA6082, and AA5754 aluminium plates with different thicknesses in lap configuration. The analysis of the experimental data and numerical results showed that down force had a significant influence on the material flow and the quality of the welds. High friction energy, and subsequent intensive material flow, promoted the vortexes formation, which improve metals mixing and grain refinements.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
