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Objectives

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Macroscopic Fracture Modes . Initiation

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Objectives

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    4. Initiation & Propagation

    6. Cleavage Mechanism I. Brittle transgranular fracture A. BCC and HCP metals only

    18. Ductile Mechanism Ductile Fracture in all metals

    25. Fracture Modes

    26. Dimple Formation: Mode I

    27. Dimple Formation: Mode II

    30. Failure Stresses Shear stresses produce plastic deformation Ductile Failure: Shear Stress Driven 2. Normal stresses tend to open up cavities, cracks Brittle Failure : Normal Stress Driven

    31. What Kind of Fracture?

    32. What Kind of Fracture?

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