CHAPTER 10-12
Metal Phase Transformation Quiz
Test your knowledge on the fascinating world of metal phase transformations, with a focus on iron-carbon alloys and their behavior under different conditions. This quiz covers important concepts in materials science, helping you deepen your understanding.
Whether you're a student, teacher, or enthusiast, this quiz offers:
- 28 multiple-choice questions
- Comprehensive coverage of chapters 10-12
- Detailed insights into phase diagrams and transformations
- formed when austenitized iron–carbon alloys are rapidly cooled (or quenched) to a relatively low temperature (in the vicinity of the ambient). Nonequilibrium single-phase structure that results from a diffusionless transformation of austenite.
SPHERIODITE
MARTENSITE
INSULATOR
BAINITE
Thin-layered structure produced in the vicinity of 540°C, decreasing temperature, the carbon diffusion rate decreases, and the layers become progressively thinner.
COARSE PEARLITE
FINE PEARLITE
BAINITE
MARTENSITE
CONDITIONS OF CONSTANT TEMPERATURE
ISOTHERMAL
SUPERCOOLING
SUPERHEATING
THERMALLY ACTIVATED
Transformations are shifted to lower temperatures than indicated by the phase diagram.
SUPERHEATING
SUPERCOOLING
ISOTHERNAL
THERMALLY ACTIVATED
WHICH IS THE FREE ENERGY REQUIRED FOR THE FORMATION OF A STABLE NUCLEUS
ACTIVATION FREE ENERGY
FREE ENERGY
ELECTRON ENERGY GAP
FERMI ENERGY
DEPENDENCE OF FRACTION of transformation on time
Avrami equation
Polarization
Impurity
Electron drift velocity
reciprocal of the halfway-to completion transformation time
Phase -
Transformation rate
Proeutectoid cementite
Cristobalite
- homogeneous portion of a system that has uniform physical and chemical characteristics
Cristobalite
Phase
Proeutectoid cementite
Supercooling
- that which forms before the eutectoid reaction
Supercooling
Proeutectoid cementite
Phase
Cristobalite
€“ the ferrite present in the pearlite.
Phase
Proeutectoid cementite
Eutectoid ferrite
Cristobalite
This rule represents a criterion for the number of phases that coexist within a system at equilibrium and is expressed by the simple equation.
Gibbs phase rule
Partially stabilized zirconia
Cristobalite
Proeutectoid cementite
- at least one of the phases experiences a change in composition
Cristobalite
Incongruent transformations
Congruent transformation
Gibbs phase rule
Another invariant reaction involving three phases at equilibrium
Eutectoid reaction -
Peritectic reaction
- the reverse reaction occurs upon heating
Eutectoid reaction
Peritectic reaction
an element of the microstructure having an identifiable and characteristic structure
Microconstituent
Macroconstituent
Segregation -
Mass fractions
The mass (or weight) of a specific phase divided by the total alloy mass (or weight)
Segregation
Mass fraction
Lever rule
Phase
That is, concentration gradients are established across the grains
Segregation
Mass fraction
Lever rule
Phase
- The tie line must be used in conjunction with this procedure
Level rule
Lever rule
Hall effect
Phase
The changes that occur when the temperature is altered (typically upon cooling).
Phase equilibrium
Phase transformations
refers to equilibrium as it applies to systems in which more than one phase may exist
Phase equilibrium
Phase transformations
- defined as a homogeneous portion of a system that has uniform physical and chemical characteristics.
Phase
Phase equilibrium
Phase transformations
Diode
A maximum concentration of solute atoms that may dissolve in the solvent to form a solid solution.
Solubility limit
Solubility rate
Electrical conductivity
Ionic conduction
- is used to specify the electrical character of a material.
Ionic conduction
Electrical conductivity
Solubility rate
Solubility limit
- a net motion of charged ions is possible that produces a current
Ionic conduction
Electrical conductivity
Solubility rate
Solubility limit
- those in which the electrical behavior is based on the electronic structure inherent in the pure material.
Intrinsic semiconductors
Extrinsic semiconductors
Forward bias
Diode
- is a result of the phenomenon by which a magnetic field applied perpendicular to the direction of motion of a charged particle exerts a force on the particle perpendicular to both the magnetic field and the particle motion directions.
Hall effect -
Diode
Forward bias
Intrinsic semiconductors
Is an electronic device that allows the current to flow in one direction only
Diode
Resistor
Capacitor
Forward bias
- When a battery is used, the positive terminal may be connected to the p-side and the negative terminal to the n-side
Diode
Forward bias
Hall effect
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