熱機處理對Ti-7.5Mo合金機械性質之影響

Abstract

In this study, cast α phase Ti-7.5Mo alloy processed different thermomechanical treatment, expect to maintain high ductility, high mechanical strength and lower tensile elastic modulus as the main purpose. The experiment is divided into three parts: The first part is strengthen condition A. The second part is strengthen condition B. The third part is strengthen condition C. Homogenized treatment condition has yield strength 470MPa, tensile strength 870MPa, ductility 27%, and tensile elastic modulus 68GPa, and its crystal structure is α phase. Strengthen condition A3, its yield strength 856MPa, tensile strength 1135MPa, ductility only 11.4% and tensile elastic modulus 62GPa, and its crystal structure is α' phase. Strengthen condition B3, it has outstanding combination of mechanical properties, yield strength 900MPa, tensile strength 1147MPa, ductility 21.6%, and tensile elastic modulus 63GPa, and its crystal structure is α' phase. Strengthen condition C1, which has the best combination of mechanical properties, yield strength 1013MPa, tensile strength 1193MPa, ductility 14.6%, and lower tensile elastic modulus 65.5GPa, and its crystal structure is α' phase.