A study on the Thermal Fatigue Properties of Mg/Mg-Al_(18)B_4O_(33) Functionally Graded Material by Thermal Cycling Test and Finite Element Method

摘要

MMCs were manufactured in two different forms. One was two-layered non FGM composite and the other was four-layered FGM composite. The matrix used in this study was AZ31 magnesium alloy and the reinforcement was Al_(18)B_4O_(33). The composite materials contained reinforcement fibers with a volume fraction of 0, 15, 25 and 40 percent. Squeeze infiltration method was used for the fabrication of each block. The thermal properties of the FGM alloy and composite joints were studied by conducting thermal cycling tests. The numerical calculation (the finite elements method-FEM) results exhibited a good agreement with the experimental results. Thermal stresses induced by thermal cycling test were clearly reduced in the functionally graded materials.