7.7 - Grains become elongated in the direction of the...

Info iconThis preview shows page 1. Sign up to view the full content.

View Full Document Right Arrow Icon
Consider the deformation of a poly-crystalline material In a polycrystalline material, the direction of slip varies from one grain to another. For each grain, dislocation motion occurs along the slip system that has the most favorable orientation to the applied stress. Mechanical integrity and coherency are maintained along the grain boundaries; hence, each grain is constrained by its neighbors.
Background image of page 1
This is the end of the preview. Sign up to access the rest of the document.

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....
View Full Document

This note was uploaded on 08/10/2009 for the course ENGN 45 taught by Professor Wendy during the Spring '09 term at City College of San Francisco.

Ask a homework question - tutors are online