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
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](/v2/_next/image?url=https%3A%2F%2Fcontent.bartleby.com%2Fqna-images%2Fquestion%2F8a6f1e3b-9c39-4224-9682-34613cae85d1%2F55278dfa-0818-42e3-8fa5-66b4aedc76b5%2Fd5sl04.jpeg&w=3840&q=75)
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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