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6. Match the proper description of the microstructure depicted below. Put the corresponding number/letter in the box beneath the microstructure. Assume equilibrium cooling conditions. Fe3C Fe3C Fe3C

6. Match the proper description of the microstructure depicted below. Put the corresponding number/letter in the box beneath the microstructure. Assume equilibrium cooling conditions. Fe3C Fe3C Fe3C

Elements Of Electromagnetics
Elements Of Electromagnetics
7th Edition
ISBN:9780190698614
Author:Sadiku, Matthew N. O.
Publisher:Sadiku, Matthew N. O.
ChapterMA: Math Assessment
Section: Chapter Questions
Problem 1.1MA
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**Microstructure Identification and Explanation** **Question:** Match the proper description of the microstructure depicted below. Put the corresponding number/letter in the box beneath the microstructure. Assume equilibrium cooling conditions. **Microstructures:** 1. First Microstructure: - Label: \( \text{α} \)-phase, \( \text{Fe}_3\text{C} \)-iron carbide particles. 2. Second Microstructure: - Label: Perlite with \( \text{α} \)-phase and \( \text{Fe}_3\text{C} \). 3. Third Microstructure: - Label: \( \text{α} \)-phase with small precipitates of \( \text{Fe}_3\text{C} \) in a peach-colored matrix. 4. Fourth Microstructure: - Label: Thick, elongated layers of \( \text{α}' \)-ferrite and thin \( \text{Fe}_3\text{C} \)-cementite layers. 5. Fifth Microstructure: - Label: Widmanstätten pattern, a mixture of \( \text{α} \)-ferrite (light bands) and \( \text{β} \)-phase (darker regions). **Choose the correct description:** **Descriptions:** [1] Eutectic composition of steel below the eutectic temperature [2] The eutectoid composition of steel below the eutectoid temperature [3] A hyper-eutectoid composition of steel above the eutectoid temperature, but below the solid solubility limit of cementite in austenite [4] A hypo-eutectoid composition of steel above the eutectoid temperature, but below the solid solubility limit of ferrite in austenite [5] A hypo-eutectoid composition of steel below the eutectoid temperature [6] A eutectoid composition of steel above the eutectoid temperature [7] A hyper-eutectoid composition of steel below the eutectoid temperature [8] A binary-eutectic material with a composition less than the solid solubility limit at room temperature [9] A binary-eutectic material with a composition greater than the solid solubility limit at room temperature but less than the solid solubility limit at the eutectic temperature at a temperature below the eutect
Transcribed Image Text:**Microstructure Identification and Explanation** **Question:** Match the proper description of the microstructure depicted below. Put the corresponding number/letter in the box beneath the microstructure. Assume equilibrium cooling conditions. **Microstructures:** 1. First Microstructure: - Label: \( \text{α} \)-phase, \( \text{Fe}_3\text{C} \)-iron carbide particles. 2. Second Microstructure: - Label: Perlite with \( \text{α} \)-phase and \( \text{Fe}_3\text{C} \). 3. Third Microstructure: - Label: \( \text{α} \)-phase with small precipitates of \( \text{Fe}_3\text{C} \) in a peach-colored matrix. 4. Fourth Microstructure: - Label: Thick, elongated layers of \( \text{α}' \)-ferrite and thin \( \text{Fe}_3\text{C} \)-cementite layers. 5. Fifth Microstructure: - Label: Widmanstätten pattern, a mixture of \( \text{α} \)-ferrite (light bands) and \( \text{β} \)-phase (darker regions). **Choose the correct description:** **Descriptions:** [1] Eutectic composition of steel below the eutectic temperature [2] The eutectoid composition of steel below the eutectoid temperature [3] A hyper-eutectoid composition of steel above the eutectoid temperature, but below the solid solubility limit of cementite in austenite [4] A hypo-eutectoid composition of steel above the eutectoid temperature, but below the solid solubility limit of ferrite in austenite [5] A hypo-eutectoid composition of steel below the eutectoid temperature [6] A eutectoid composition of steel above the eutectoid temperature [7] A hyper-eutectoid composition of steel below the eutectoid temperature [8] A binary-eutectic material with a composition less than the solid solubility limit at room temperature [9] A binary-eutectic material with a composition greater than the solid solubility limit at room temperature but less than the solid solubility limit at the eutectic temperature at a temperature below the eutect
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