MCE 230_F10_lec_21 - strain curve) (unit: energy per unit...

Info iconThis preview shows pages 1–9. Sign up to view the full content.

View Full Document Right Arrow Icon
MCE 230 – Materials Science Fall 2010 Lecture - 21
Background image of page 1

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

View Full DocumentRight Arrow Icon
Mechanical Properties of Metals
Background image of page 2
Ductility It measures the degree of plastic deformation If the material has little or no plastic deformation upon fracture----- it is called Brittle Can be expressed as : Percent elongation Or percent reduction in area
Background image of page 3

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

View Full DocumentRight Arrow Icon
Tensile Properties Yield strength Tensile (ultimate) strength Ductility Resilience Toughness
Background image of page 4
Resilience The capacity of a material to absorb energy when is elastically deformed and then upon unloading to have this energy recovered. Modulus of resilience (Ur) (area under the elastic region of the stress-
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
Background image of page 7

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

View Full DocumentRight Arrow Icon
Background image of page 8
Background image of page 9
This is the end of the preview. Sign up to access the rest of the document.

Unformatted text preview: strain curve) (unit: energy per unit volume J/m 3 or Pa ) For linear elastic region: Toughness The ability for a material to absorb energy up to fracture. Fracture toughness: material’s resistance to fracture The units for toughness are the same as for resilience (energy per unit volume J/m 3 or Pa ) For a material to be tough it has to have both strength and ductility . Stiffness Material’s resistance to elastic deformation. Material with higher modulus of elasticity (E) is stiffer Effect of Temperature Stress-Strain Curves for Iron Concept Check...
View Full Document

Page1 / 9

MCE 230_F10_lec_21 - strain curve) (unit: energy per unit...

This preview shows document pages 1 - 9. Sign up to view the full document.

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