Unformatted text preview: Grains become elongated in the direction of the applied stress. Poly-crystalline materials are generally stronger than single crystal materials for 2 reasons: 1. Even though a single grain may be favorably oriented with the applied stress for slip to occur, it can’t deform until adjacent and less favorable oriented grains do. 2. Grain boundaries act as obstacles to slip....
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- Spring '09
- Materials Science, grain boundaries