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Fracture surface of an aluminium crank arm from a bicycle. The dark area (due to oil, dirt and fretting) is a slow growth fatigue crack and may contai
Fracture surface of an aluminium crank arm from a bicycle. The dark area (due to oil, dirt and fretting) is a slow growth fatigue crack and may contain striations. The bright area is caused by sudden fracture.
Micrographs showing how surface fatigue cracks grow as material is further cycled. From Ewing & Humfrey, 1903
Micrographs showing how surface fatigue cracks grow as material is further cycled. From Ewing & Humfrey, 1903
Fracture surface in a glass rod showing beach marks surrounding the initiation site.
Fracture surface in a glass rod showing beach marks surrounding the initiation site.
Example of a HFMI treated steel highway bridge to avoid fatigue along the weld transition.
Example of a HFMI treated steel highway bridge to avoid fatigue along the weld transition.
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Morphology of fracture surfaces in materials that display ductile crack growth is influenced by changes in specimen thickness.
Morphology of fracture surfaces in materials that display ductile crack growth is influenced by changes in specimen thickness.