Mechanical Behaviors and Microstructural Characteristics of TC11 Alloy during Hot Deformation

摘要

The mechanical behaviors and the microstuctural characteristics of TC11 alloy with quenched martensite microstructure during hot compressive deformation were 9investigated. It shows that at various temperatures and strain rates, the stress-strain curves firstly exhibit strain hardening, then strain softening and finally reach the steady deformation stature; in the meanwhile, the initial lamella microstructure is transformed into the equipped and uniform one through dynamic recrystallization. It shows that the present TC11 alloy has different Z-D relationships in relatively lower temperature (RLT) range and relatively higher temperature (RHT) range, which is believed to be due to different deformation activation energies. During RHT deformation, dynamic recrystallization occurs in both phases and β phases, but during RLT deformation, dynamic recrystallization only occurs in α phases and in the meanwhile β phases undergo a process of precipitation and growth.