Question

What is ductile to brittle transition for BCC materials and what is DBT for FCC materials?

Answer 1

metal . Steel at & the Ductile brittle transition is exhibited in BCC such as low casboro nehich become brittle at low temp. or Nesu high Strain rate. FCC melal. however remain ductile at low temp. In betals plastic de formation at room dis location motion generally temp. occurs by moved a The Strees rega to the atomic Salute atoms dislocation depends and obstacles such R Crystal ost. grain bounchies. If the Stress rego moving the dislocation is too high the metal neill fail instead by 07 Cracks will be brittle this plastic How depending on which process req. Smaller dppliedo Stress the propagation either flow ocus ductile-britter fracture transformo How ductile fracture emesgy brittle fracture temp.

the phenomena in which ductile material is trans formes to brittle Called ductile to brittle transintion (DBT) At low Ta high stress level fast rates gives duelite to brittle transition this is called brittle framsintion temp. or loading Fcc metal mone ductile Low BC Strength energy absorbed mne brittle High Strength alloys temp