Microstructure characteristics and strengthening mechanism of semisolid CuSn10P1 alloys

Studies on the rheoforming of high melting point alloys are scarce due to difficulties in preparing semisolid slurries. This work applied a novel enclosed cooling slope channel (ECSC) prepare slurry and squeeze cast CuSn10P1 (weight percent) alloy. The microstructure phase formation slurry, properties liquid casting, rheo-squeeze casting with or without isothermal treatment were investigated through X-ray diffraction, scanning electron microscopy, probe microanalysis, nanoindentation, transmission microscopy. results show that is transformed from coarse dendrites as-cast equiaxed grains semisolid. rate ECSC process suppressed tin diffusion induce metastable ??-Cu13.7Sn. average values modulus micro-hardness part after soaking for 20 s 121.99 ± 14.03 GPa 2.01 0.94 GPa, which was lower than indicating it has good deformability. tensile strength elongation 417 MPa 12.6%, increase by 26.3% three times, respectively, compared those squeezing, likely attributed solution strengthening, fine grain homogenization. In addition, fracture mechanism brittle combination cleavage ductile treatment.