Fracture mechanism of a coarse-grained magnesium alloy during fracture toughness testing |
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| Authors: | H. Somekawa A. Singh T. Mukai |
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| Affiliation: | 1. Structural Metals Center, National Institute for Materials Science , Ibaraki, Japan SOMEKAWA.Hidetoshi@nims.go.jp;3. Structural Metals Center, National Institute for Materials Science , Ibaraki, Japan |
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| Abstract: | 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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| Keywords: | toughness magnesium alloy deformation twins electron backscatter diffraction |
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