Page 69 - Biaxial Multiaxial Fatigue and Fracture
P. 69
54 E UBESSE-JlED ET AL.
Table 3. Mean geometrical parameters measured on multi-pass MIG butt welds in 7020
aluminium alloy (thickness equal to 20 mm).
Top bead Root bead
R1 R2 Rmin Lpc S R1 R2 Rmin Lpc S
Meanvalue(mm) 12.6 4.3 2.7 34 2.9 6.7 4.0 3.7 28.4 3.6
Standarddeviation 9.1 4.5 1.5 3.0 0.6 3.3 2.4 2.2 2.4 0.7
(mm)
R2
Fig. 12. Geometrical and micro-geometrical parameters of fillet welds
The mean values and standard deviations of the geometrical parameters measured on several
fillet welded joints in 7020 aluminium alloy of 30 mm or 20 mm thickness, welded using the
multi-layer MIG process, are given in Table 4.
Table 4. Average geometrical parameters measured on multi-layer MIG fillet welds in 7020
aluminium alloy (thickness t and T equal to 20 mm and 30 mm respectively).
Welds A & B Weld A Weld B J1 52 S
R1 R2 R1 R2 R1 R2
Meanvalue 2.9 2.8 2.6 2.9 1.7 1.3 14.2 16.2 0.9
(mm>
Standard 1.6 1.8 1.2 1.2 0.8 1.1 0.8 0.7 0.6
deviation (mm)
