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WorksheetsMetal Solidification and Phase Diagrams Quiz
Total questions: 15
Worksheet time: 8mins
What is the first stage in the solidification process of metal?
Solidification is complete
Cluster of nucleus form
Small dendrites begin to develop
Spaces between dendrites fill
What is the temperature below which a substance is stable in the solid state called?
Eutectoid
Critical temperature
Liquidus
Solidus
Which phase diagram shows the connection between the amount of carbon and the changes in internal structure of iron and steels?
Binary phase diagram
Iron-Carbon phase diagram
Isomorphous system
Eutectic phase diagram
What is the maximum carbon solubility in α-ferrite at 727°C?
6.67%
0.022%
0.09%
2.14%
What structure does austenite have?
Face-centered cubic (FCC)
Hexagonal close-packed (HCP)
Body-centered cubic (BCC)
Simple cubic
What is the eutectoid composition for ferrite and cementite?
0.9% carbon
0.5% carbon
1.2% carbon
0.76% carbon
What happens to austenite when cooled rapidly?
It transforms into ferrite
It turns into cementite
It transforms into martensite
It remains unchanged
What is cementite also known as?
Fe4C
FeO
Fe3C
Fe2O3
What is the stable form of iron at room temperature?
Austenite
Martensite
Ferrite
Cementite
What is the effect of adding chromium to steel?
Decreases hardness
Increases ductility
Increases resistance to corrosion
Lowers tensile strength
What is the upper critical temperature for hypereutectoid steels?
727°C
910°C
1538°C
1147°C
What is the structure of pearlite?
Amorphous structure
Single phase
Lamellar structure
Cubic structure
What is the primary structural material in technologically advanced cultures?
Copper
Aluminum
Iron-carbon alloys
Magnesium
What is the maximum solubility of carbon in γ-austenite at 1147°C?
0.76%
0.09%
2.14%
0.022%
What is the primary characteristic of martensite?
Hard and brittle
Stable at high temperatures
Soft and ductile
High solubility for carbon
