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 No appreciable plastic deformation

 Crack propagation is very fast

 Crack propagates nearly perpendicular to the direction of the applied stress

 Crack often propagates by cleavage – breaking of atomic bonds along specific crystallographic planes (cleavage planes).

Figure 5.6 Brittle fracture in a mild steel.

Source: Callister, William D. and Rethwisch, David G. (2009). Materials Science and Engineering: An Introduction, 8e. Wiley.