Crack resistance evaluation for Al+3.5% Mg alloys by measurments of ultrasonic velocities and hardness

  • 1 Institute of Mechanics - BAS, Sofia, Bulgaria
  • 2 Institute of Metal Science, Eqipment, and Technologies - BAS,Sofia, Bulgaria


The crack resistance in fracture mechanics is defined as critical value of stress intensity factor in the plane-strain fracture toughness. A mechanical test is used to assess it under certain conditions. This is a complicated, long and expensive procedure. In practice, it is of interest to determine the crack resistance for construction elements by means non-destructive evaluations (NDE).



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