Fig. 1. Test sample

Fig. 2. Scan results of X-CT. (a) Three-dimensional reconstruction image; (b) pore size distribution; (c) pore sphericity distribution

Fig. 3. Schematic diagram of tensile specimenEs dimensions

Fig. 4. RVE model with randomly distributed pores

Fig. 5. Stress-strain curve

Fig. 6. Dispersion of tensile strength

Fig. 7. RVE model with defects. (a) Porosity is 0.5%; (b) porosity is 1.5%; (c) porosity is 2.5%

Fig. 8. Variation of tensile properties with porosity. (a) Tensile strength; (b) elasticity modulus

Fig. 9. RVE model. (a) Porosity is 0.5%, pore size is 50 μm; (b) porosity is 1.5%, pore size is 100 μm; (c) porosity is 2.5%, pore size is 150 μm

Fig. 10. Effect of pore size on tensile properties at different porosities. (a) Tensile strength; (b) elasticity modulus

Fig. 11. Equivalent stress cloud maps of RVE models with different pore sizes at 2.5% porosity. (a) 25 μm; (b) 50 μm; (c) 100 μm; (d) 150 μm; (e) 175 μm

Fig. 12. Equivalent stress cloud maps of RVE models. (a) Porosity is 0.5%, pore size is 50 μm; (b) porosity is 0.5%, pore size is 100 μm; (c) porosity is 1.5%, pore size is 50 μm; (d) porosity is 1.5%, pore size is 100 μm