Describe the microscopic processes that take place during du

Describe the microscopic processes that take place during ductile and brittle fracture. What are the differences in appearance of these fractures?

Solution

in ductile materials fracture is preceded by necking followed by formation of voids and then by coalescence of void finally crack. this fracture also called cup and cone fracture

appearance is dull and rough

in brittle materials fracture is sudden without any observable plastic deformantion this transgranular fracture is along grain boundaries

apperance is smooth surface