8-Mechanical Behavior

Slip planes slip or shear deformation of metal atoms

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

View Full Document Right Arrow Icon
This is the end of the preview. Sign up to access the rest of the document.

Unformatted text preview: specific crystallographic planes results in “slip bands”. Slip HCP: Restricted to basal planes FCC: Multiple slip planes BCC: Multiple slip planes Slip bands contain many slip lines. Dilemma Problem: Metal crystals should be about 1,000 to 10,000 times stronger than their observed strength if one considers the theoretical bonding strength of the atoms. Why aren’t they this strong? Explanation: A high density of crystalline imperfections must be present to lower the theoretical shear strength. DISLOCATIONS Created in materials by solidification process and deformation processing of materials. A small amount of stress is required for slip by dislocations since only a small group of atoms slip over each other at any instant. Dislocation moving through lattice Observing Dislocations...
View Full Document

This document was uploaded on 02/27/2014 for the course NANO 108 at UCSD.

Ask a homework question - tutors are online