Metal Phase Diagrams Quiz

Which of the following is a primary property of Copper-Nickel alloys?

• High electrical conductivity

• High corrosion resistance

• Low melting point

• High thermal expansion

In a Lead-Tin phase diagram, what is the primary phase present at room temperature for an alloy with 40% Tin?

• Pure Lead

• Pure Tin

• Eutectic mixture

What is the main phase transformation that occurs in steel when it is cooled slowly from 900°C to room temperature?

• Martensite to Austenite

• Austenite to Pearlite

• Ferrite to Cementite

• Bainite to Martensite

Which technique is commonly used to interpret phase diagrams?

• X-ray diffraction

• Differential scanning calorimetry

• Lever rule

• Scanning electron microscopy

How does increasing temperature generally affect the phases in a binary alloy system?

• Increases the number of solid phases

• Decreases the number of solid phases

• Has no effect on the phases

• Converts all phases to liquid

Which of the following is an application of phase diagrams in materials science?

• Determining electrical conductivity

• Predicting phase stability

• Measuring hardness

• Calculating tensile strength

What is the eutectic temperature in a Lead-Tin phase diagram?

• 183°C

• 327°C

• 232°C

• 96°C

In a Copper-Nickel phase diagram, what is the primary phase present at 50% Nickel and 1200°C?

• Liquid

• Eutectic mixture

What is the effect of adding Nickel to Copper in terms of mechanical properties?

• Decreases tensile strength

• Increases ductility

• Increases tensile strength

• Decreases hardness

Which phase is not present in the Iron-Carbon phase diagram?

• Austenite

• Ferrite

• Martensite

• Graphite