The hot deformation behaviour of SiC_P/Al 2024 composites with different sizes of SiC_P reinforcements (1, 8, 15, 36, and 44 ㎛)was studied by hot torsion tests in the temperature ranges fo 320 to 520℃ under strain rates of 0.2 to 3.0/sec For the c...
The hot deformation behaviour of SiC_P/Al 2024 composites with different sizes of SiC_P reinforcements (1, 8, 15, 36, and 44 ㎛)was studied by hot torsion tests in the temperature ranges fo 320 to 520℃ under strain rates of 0.2 to 3.0/sec For the composites reinforced with SiC_P of 8, 15, 36, and 44 ㎛ sizes, dynamic recrystallization(DRX) was responsible for the hot restoration at 320-480℃, while for the composite reinforced with SiC_P of 1㎛ size, dynamic recrystallization(DRX) was responsible for the hot restoration at 320-430℃, and dynamic recovery(DRV) was responsible for the hot restoration at 480℃ The composite reinforced with SiC_P of 8㎛ among the SiC_P/Al 2024 composites used showed the highest flow stress (265 MPa) at 320℃ and the highest failure strain (3.65) at 480℃ under a strain rate of 1.0/sec In addition, the composite reinforced with SiC_P of 1㎛ among the SiC_P/Al 2024 composites used showed the highest strain rate sensitivity (0.36) at 480℃