Mechanical Properties
The ratio of stress and strain below the proportional limit.
Young's modulus
Diffusion is fastest in this cubic unit cell
The transition of a liquid and solid to another solid on cooling
peritectic reaction
The hardness attained for a specified cooling rate
Hardenability
This test is used to determine the toughness of a material under shock loading
impact testing
The point of noticeable plastic deformation
Yield Point
These three items are never acceptable in a Miller index for a plane.
infinity signs, fractions, and commas
The equilibrium structure that exists at 0.76 wt% C above 727°C.
austenite
The result of rapidly cooling a medium carbon steel to room temperature.
untempered martensite
The value of the flattened portion of an S-N curve is called the _____
fatigue limit
The calculation to get the toughness of a material
Steels have less of this, cast irons have more.
carbon content
liquidus
This is what you call heating untempered martensite to 1100°F, holding for an hour, and cooling to room temperature.
tempering
Moderately ductile metals have this type of fracture surface
cup and cone
The material should be ____ in order to accurately estimate strength from Brinell hardness
steel
The general name for iron with carbon and other elements.
alloyed steels
eutectic composition
The following are examples of ____:
-precipitation processes which produce submicroscopic particles during low temp heat treating
-increasing carbon content of low-carbon steels
-mechanical deformation below the recrystallization temp
strengthening mechanisms
This value is higher than engineering stress at fracture because it takes into account the instantaneous area of the specimen, instead of the original area.
true stress
An electric highline cable has one cold-drawn steel wire and six annealed aluminum wires, each 2 mm in diameter. The stiffness of the cable is ________ if the steel and aluminum have elastic modulus values of 205 GPa and 70 GPa, respectively.
89 GPa
This happens to the number of vacancies, and to the diffusion rate, in a crystalline solid when heated.
exponential increase
1020
The result of austenitizing a medium carbon steel for an extended period of time, cooling rapidly to 1300°F and holding for 18+ hours.
spheroidite
A steel with a fracture toughness of 125,000 psi*in^1/2 has a yield strength of 150,000 psi and a surface crack that is 0.18 inches deep. This is the type of behavior the material will undergo first as the load is increased from zero (deformation vs fracture).
deformation