Plasticity Improvement of Ball-Spun Magnesium Alloy Tube Based on Stress Triaxiality

Figure 6

Cloud diagram of relative stress triaxiality for different ball diameters. (a) R = 2.5 mm, f = 0.2 mm/r, and Δt = 0.2 mm. (b) R = 3 mm, f = 0.2 mm/r, and Δt = 0.2 mm. (c) R = 4 mm, f = 0.2 mm/r, and Δt = 0.2 mm.

(a)

(b)

(c)