ENGRI1110_Lect24_Oct23_posted - Addition to Umbach Office...

Info iconThis preview shows pages 1–10. Sign up to view the full content.

View Full Document Right Arrow Icon
Addition to Umbach Office hours Thursdays: 11:30-12:30 (weekly tutorial) Just Today (Friday): 1:45-3:00
Background image of page 1

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
Background image of page 2
Plastic deformation: material “yields” to applied stress Elastic stretching: linear, recoverable Young’s Modulus (Modulus of Elasticity), E = σ / ε (Hooke’s Law) 1/E : compliance Modulus: units of stress
Background image of page 3

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
h max h o
Background image of page 4
Nanoindenter ? Nanoindenter ?
Background image of page 5

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
Background image of page 6
Strengthening Materials Strengthening Materials Metals: Stop dislocation movement Control grain size (grain refining) Difficult for a dislocation to pass into another grain Solid solution strengthening (atoms of different sizes) Precipitation strengthening Strain hardening (introduce other source of strain to slow dislocations, such as more dislocations) Ceramics: dislocations don’t move easily How to make ceramics stronger?
Background image of page 7

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
Non Metallic Materials: Cracks Non Metallic Materials: Cracks Covalent Bonding: Movement of dislocations difficult (Ionic Bonding)
Background image of page 8
Catastrophic Failure Catastrophic Failure M. Buehler/Massachusetts Institute of Technology
Background image of page 9

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
Image of page 10
This is the end of the preview. Sign up to access the rest of the document.

This note was uploaded on 02/10/2010 for the course ENGRI 1110 at Cornell University (Engineering School).

Page1 / 20

ENGRI1110_Lect24_Oct23_posted - Addition to Umbach Office...

This preview shows document pages 1 - 10. Sign up to view the full document.

View Full Document Right Arrow Icon
Ask a homework question - tutors are online