Metal Forming and Mechanical Properties Quiz

Choose a study mode

Play Quiz

Study Flashcards

Spaced Repetition

Chat to Lesson

Podcast

Play an AI-generated podcast conversation about this lesson

Questions and Answers

What are the properties that determine a material's behavior when subjected to mechanical stresses?

Melting point, boiling point, malleability, and thermal expansion
Elastic modulus, ductility, hardness, and various measures of strength (correct)
Elastic modulus, toughness, brittleness, and fatigue resistance
Density, color, thermal conductivity, and electrical resistivity

What type of strains are caused by applied loads in metal forming processes?

Thermal strains
Plastic (permanent) strains (correct)
Creep strains
Elastic strains

What does the ability to form metals increase with?

The decrease of its ductility
The increase of its hardness
The increase of its ductility (correct)
The decrease of its hardness

In which region of the stress-strain curve is the material primarily plastically deformed?

<p>Plastic region (D)</p> Signup and view all the answers

How is metal's behavior expressed in the plastic region based on the flow curve?

<p>$\sigma = K\varepsilon^n$ where $K$ = strength coefficient; and $n$ = strain hardening exponent based on true stress and true strain (C)</p> Signup and view all the answers

Flashcards are hidden until you start studying

Study Notes

Mechanical Properties of Materials

A material's behavior when subjected to mechanical stresses is determined by its mechanical properties, including strength, toughness, ductility, hardness, and stiffness.

Metal Forming Processes

Applied loads in metal forming processes cause plastic strains, which are non-reversible deformations that occur when a material is subjected to stress beyond its elastic limit.

Formability of Metals

The ability to form metals increases with their ductility, which is the ability of a material to be stretched or drawn without breaking.

Stress-Strain Curve

In the plastic region of the stress-strain curve, the material is primarily plastically deformed, meaning it undergoes permanent deformation without breaking.

Plastic Region Behavior

A metal's behavior in the plastic region is expressed by its flow curve, which shows the relationship between stress and strain during plastic deformation, providing insights into the metal's plastic flow behavior.