PSI - Issue 49

Minghua Cao et al. / Procedia Structural Integrity 49 (2023) 74–80 Minghua Cao et al. / Structural Integrity Procedia 00 (2023) 000 – 000

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5

(a)

(b)

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Model A1 Model B1 Model C1

Model A1 Model B1 Model C1

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von Mises stress (MPa)

von Mises stress (MPa)

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0.0 0.5 1.0 1.5 2.0 2.5 3.0 3.5 4.0 4.5 5.0 5.5 6.0 6.5 7.0 7.5 0

0.0 0.5 1.0 1.5 2.0 2.5 3.0 3.5 4.0 4.5 5.0 5.5 6.0 6.5 7.0 7.5 0

Distance from point A (μm)

Distance from point A (μm)

Fig. 3 Distribution of von Mises stress along path AB under FFBC for different inclusion aspect ratios: (a) 500 °C after heating; (b) 20 °C after cooling.

(a)

(b)

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Model A2 Model B2 Model C2

Model A2 Model B2 Model C2

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20 von Mises stress (MPa)

20 von Mises stress (MPa)

0.0 0.5 1.0 1.5 2.0 2.5 3.0 3.5 4.0 4.5 5.0 5.5 6.0 6.5 7.0 7.5 0

0.0 0.5 1.0 1.5 2.0 2.5 3.0 3.5 4.0 4.5 5.0 5.5 6.0 6.5 7.0 7.5 0

Distance from point A (μm)

Distance from point A (μm)

Fig. 4 Distribution of von Mises stress along path AB under PBCs for different inclusion aspect ratios: (a) 500 °C after heating; (b) 20 °C after cooling.

3.2. Plasticisation domains in MMC-HA The plasticisation domain around the spherical inclusion (Model A1) caused by compressive stress in both phases under FFBCs is shown in Fig. 5. The plasticisation of the matrix under FFBCs was up to 0.08 at 500 °C and was 0.14 at 20 °C after cooling down under FFBCs. Along the path from the interface between two phases to the boundary surfaces of the matrix domain, the plasticisation of the Mg matrix decreased, which is consistent with the trend of von Mises distribution (Fig. 3). The plasticisation accumulated during thermal loading under FFBCs. Under PBCs, the plasticisation of the matrix was relatively low (up to 0.0024) and remained constant during thermal load.