Fig. 8From: Multi-objective optimization of functionally graded thickness tubes under external inversion over circular diesExperimental and FE simulation deformation pictures. a UT tube. b FGT tube with lathe angles \( \alpha ={1}^{\bigcirc } \). c FGT tube with lathe angles \( \alpha ={2}^{\bigcirc } \). d FGT tube with lathe angles \( \alpha ={3}^{\bigcirc } \) Back to article page