CE Mat - Charpy

Typical structural steels (including A36 and A992) have a % carbon content of approximately ...

• 0.025%

• 0.25%

• 2.5%

• 25%

In general, increasing the carbon content of a steel....

• Increases ductility

• Decreases strength

• Increases the modulus of elasticity

• Increases hardness

Answer explanation

Page 92 of Book

Tags

NGSS.HS-PS2-6

Select the raw materials that are used to create pig iron.

• Iron Ore

• Pig Hooves

• Limestone

• Coke

• Air/Oxygen

The purpose of the Charpy Impact test is to determine a metal's ...

• modulus of elasticity

• ultimate tensile strength

• toughness

• ultimate compression strength

The Charpy Impact Test machine measures the ...

• the energy required to fracture a sample of metal

• the modulus of elasticity of the metal

• the exact carbon content of the metal

• the metals strain prior to fracture

• the stress in the metal prior to fracture

Tags

NGSS.HS-PS2-3

In our Charpy lab, the metal specimens that we test will have varying ... (select all that apply)

• Chemical Compositions

• Heat Treatments

• Notch Sizes

• Temperatures

By testing the toughness of the same metal at different temperatures, we can identify that metal's ...

• carbon content

• chemical composition

• heat treatment

• ductile to brittle transition point

Tags

NGSS.HS-PS3-4

There are two ways to ID a metals ductile to brittle transition point. One way to identify the transition is to look at a graph of ...

• carbon content vs. fracture strength

• carbon content vs. fracture energy

• temperature vs. fracture strength

• temperature vs. fracture energy

Fill In The Blank: The lab manual also asks you to use the second method of determining a metal's transition point, which is why you need to include pictures or sketches of the _______ in your lab report.

• Charpy testing machine

• fracture energy indicator

• metal's fracture surface

• notch in the metal

The photo shows charpy samples with a ductile and a brittle fracture. What type of failure does a brittle metal exhibit?

• Unstable (Cleavage)

• Stable (Shear)

• Horizontal Buckling

• Surface Compression