Issue 55

D. Benyarou et alii, Frattura ed Integrità Strutturale, 55 (2021) 145-158; DOI: 10.3221/IGF-ESIS.55.11

Tool rotation speed (rpm)

Mean value of maximum shearing force (N)

Specimens ID

Dwell time (S)

PC _1 PC _2 PC _3 PC _4 PC _5 PC _6 PC _7 PC _8 PC _9 PC _10 PC _11 PC _12 PC _13 PC _14 PC _15 PC _16 PC _17 PC _18 PC _19 PC _20 PC _21 PC _22 PC _23 PC _24 PC _25 PC _26 PC _27 PC _28 PC _29 PC _30 PC _31 PC _32 PC _33 PC _34 PC _35 PC _36

750 750 750 875 875 875

60 60 60 60 60 60 60 60 60 90 90 90 90 90 90 90 90 90

1366

1832

1100 1100 1100

686

750 750 750 875 875 875

1450

1111

1100 1100 1100

1815

750 750 750 875 875 875

120 120 120 120 120 120 120 120 120 150 150 150 150 150 150 150 150

1511

1723

1100 1100 1100

2155

750 750 750 875 875 875

2032

1151

1100 1100 1100

733

150 Table 2: Welding parameters ranges. All the welding operations were done at the room temperature. At the beginning of each welding operation, the pin and the shoulder of the tool were cooled to the room temperature. The joint shape is presented in Fig. 5 which shows the appearance of the test specimen after the friction stir spot welding. The tool shape is transferred onto the joint on the upper sheet and the metal that is pushed out by the tool forms a ring of excess metal around the weld.

150