Friction stir weld evolution of dynamically recrystallized AA 2095 weldments

The use of friction stirring to join dynamically recrystallized Al-base thin sheets for structural parts brought about the need for the macro and microstructural evolution and hardness characterization. FSW augmented the formation of fine-equiaxed structure with high grain boundary misorientation angles. The thermal and mechanical effect associated with FSW controlled the particle size and distribution within the weld nugget and hence the hardness profile.