3. Thermodynamics and Phases
Phase Transformations — Quiz
Test your understanding of phase transformations with 5 practice questions.
Practice Questions
Question 1
Which of the following phenomena is characterized by the formation of stable nuclei of a new phase, often requiring a critical size to overcome surface energy barriers?
Question 2
In a diffusion-controlled phase transformation, the rate of transformation is directly proportional to the diffusion coefficient, D. If the activation energy for diffusion is $Q_d$ and the gas constant is $R$, which of the following expressions correctly represents the temperature dependence of the diffusion coefficient?
Question 3
Consider a Time-Temperature-Transformation (TTT) diagram for an alloy. If a material is rapidly cooled to a temperature just below the 'nose' of the C-curve and held isothermally, which of the following microstructures is most likely to form?
Question 4
Which of the following statements accurately describes the primary difference in how Time-Temperature-Transformation (TTT) and Continuous Cooling Transformation (CCT) diagrams are constructed and applied?
Question 5
During a phase transformation, the 'growth' stage involves which of the following processes?