Fracture mechanism of a coarse-grained magnesium alloy during fracture toughness testing
H Somekawa, A Singh, T Mukai - Philosophical Magazine Letters, 2009 - Taylor & Francis
H Somekawa, A Singh, T Mukai
Philosophical Magazine Letters, 2009•Taylor & FrancisThe fracture mechanism during fracture toughness testing has been investigated on a
coarse-grained magnesium alloy, with an average grain size of∼ 50 µm, and a low fracture
toughness. The results show that {10 1 2}-type deformation twins are formed at the crack tip
and many dislocations pile up on these boundaries. The accumulated strains at these
boundaries become the origin of fracture; ie cracks propagate along these boundaries
between the deformation twins and the matrix.
coarse-grained magnesium alloy, with an average grain size of∼ 50 µm, and a low fracture
toughness. The results show that {10 1 2}-type deformation twins are formed at the crack tip
and many dislocations pile up on these boundaries. The accumulated strains at these
boundaries become the origin of fracture; ie cracks propagate along these boundaries
between the deformation twins and the matrix.
The fracture mechanism during fracture toughness testing has been investigated on a coarse-grained magnesium alloy, with an average grain size of ∼50 µm, and a low fracture toughness. The results show that {1012}-type deformation twins are formed at the crack tip and many dislocations pile up on these boundaries. The accumulated strains at these boundaries become the origin of fracture; i.e. cracks propagate along these boundaries between the deformation twins and the matrix.
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