A 30 wt% Ni-70 wt% Cu alloy (Animated Figure 9.3a) is slowly cooled from 1400°C (2550°F) to 1150°℃ (2100°F). (a) At what temperature does the first solid phase form? i ! °C (b) What is the composition of this solid phase? i %wt Ni (c) At what temperature does the last of the liquid solidify? i °℃ (d) What is the composition of this last remaining liquid phase? i %wt Ni
A 30 wt% Ni-70 wt% Cu alloy (Animated Figure 9.3a) is slowly cooled from 1400°C (2550°F) to 1150°℃ (2100°F). (a) At what temperature does the first solid phase form? i ! °C (b) What is the composition of this solid phase? i %wt Ni (c) At what temperature does the last of the liquid solidify? i °℃ (d) What is the composition of this last remaining liquid phase? i %wt Ni
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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![## Phase Change in a Nickel-Copper Alloy
A 30 wt% Ni-70 wt% Cu alloy is gradually cooled from 1400°C (2550°F) to 1150°C (2100°F).
### Questions
**(a)** At what temperature does the first solid phase form?
(Input your answer in °C)
**(b)** What is the composition of this solid phase?
(Input your answer in %wt Ni)
**(c)** At what temperature does the last of the liquid solidify?
(Input your answer in °C)
**(d)** What is the composition of this last remaining liquid phase?
(Input your answer in %wt Ni)
### Explanation
- **Illustration**: The exercise is based on theoretical data which might be derived from phase diagrams, specifically addressing when certain phase transformations occur as temperature changes.
- **Focus Points**: Determining phase formation temperatures and compositions is crucial for understanding alloy behaviors and properties during cooling processes.](/v2/_next/image?url=https%3A%2F%2Fcontent.bartleby.com%2Fqna-images%2Fquestion%2Fd11102b1-e9d2-4b8f-a3bc-cb638b777a97%2F18079114-eecf-4835-a3cf-ef0f6d679722%2Fof3syud_processed.png&w=3840&q=75)
Transcribed Image Text:## Phase Change in a Nickel-Copper Alloy
A 30 wt% Ni-70 wt% Cu alloy is gradually cooled from 1400°C (2550°F) to 1150°C (2100°F).
### Questions
**(a)** At what temperature does the first solid phase form?
(Input your answer in °C)
**(b)** What is the composition of this solid phase?
(Input your answer in %wt Ni)
**(c)** At what temperature does the last of the liquid solidify?
(Input your answer in °C)
**(d)** What is the composition of this last remaining liquid phase?
(Input your answer in %wt Ni)
### Explanation
- **Illustration**: The exercise is based on theoretical data which might be derived from phase diagrams, specifically addressing when certain phase transformations occur as temperature changes.
- **Focus Points**: Determining phase formation temperatures and compositions is crucial for understanding alloy behaviors and properties during cooling processes.
![### Cu-Ni Phase Diagram
This phase diagram illustrates the phase behavior of a copper-nickel (Cu-Ni) alloy as a function of temperature and composition.
#### Axes:
- The x-axis represents the composition of nickel in the alloy, displaying two scales:
- Atomic percent (at% Ni) from 0 to 100.
- Weight percent (wt% Ni) from 0 to 100.
- The left y-axis shows the temperature in degrees Celsius (°C) ranging from 1000°C to 1600°C.
- The right y-axis shows the temperature in degrees Fahrenheit (°F) ranging from 2000°F to 2800°F.
#### Key Lines:
- **Liquidus Line**: Marks the boundary above which the alloy is entirely liquid.
- **Solidus Line**: Marks the boundary below which the alloy is entirely solid.
- The region between these lines represents a phase where both solid and liquid phases coexist, denoted as α + L.
#### Phases:
- **Liquid Phase**: Found above the liquidus line.
- **Solid Phase (α)**: Found below the solidus line.
- **Two-Phase Region (α + L)**: Exists between the liquidus and solidus lines.
#### Notable Points:
- **Point A**: Located in the solid phase region.
- **Point B**: Located in the two-phase region (α + L), showing the presence of both solid and liquid phases.
#### Temperature:
- The maximum labeled temperature is 1453°C at the 100% Ni point on the phase diagram.
#### Composition and Temperature Labels:
- Near the top right corner, there is a yellow box for providing specific composition and temperature values, currently left blank for customization.
This diagram is crucial for understanding the melting and solidification behaviors of Cu-Ni alloys, which is vital for applications requiring controlled alloying and thermal properties.](/v2/_next/image?url=https%3A%2F%2Fcontent.bartleby.com%2Fqna-images%2Fquestion%2Fd11102b1-e9d2-4b8f-a3bc-cb638b777a97%2F18079114-eecf-4835-a3cf-ef0f6d679722%2Fzg0zbsn_processed.png&w=3840&q=75)
Transcribed Image Text:### Cu-Ni Phase Diagram
This phase diagram illustrates the phase behavior of a copper-nickel (Cu-Ni) alloy as a function of temperature and composition.
#### Axes:
- The x-axis represents the composition of nickel in the alloy, displaying two scales:
- Atomic percent (at% Ni) from 0 to 100.
- Weight percent (wt% Ni) from 0 to 100.
- The left y-axis shows the temperature in degrees Celsius (°C) ranging from 1000°C to 1600°C.
- The right y-axis shows the temperature in degrees Fahrenheit (°F) ranging from 2000°F to 2800°F.
#### Key Lines:
- **Liquidus Line**: Marks the boundary above which the alloy is entirely liquid.
- **Solidus Line**: Marks the boundary below which the alloy is entirely solid.
- The region between these lines represents a phase where both solid and liquid phases coexist, denoted as α + L.
#### Phases:
- **Liquid Phase**: Found above the liquidus line.
- **Solid Phase (α)**: Found below the solidus line.
- **Two-Phase Region (α + L)**: Exists between the liquidus and solidus lines.
#### Notable Points:
- **Point A**: Located in the solid phase region.
- **Point B**: Located in the two-phase region (α + L), showing the presence of both solid and liquid phases.
#### Temperature:
- The maximum labeled temperature is 1453°C at the 100% Ni point on the phase diagram.
#### Composition and Temperature Labels:
- Near the top right corner, there is a yellow box for providing specific composition and temperature values, currently left blank for customization.
This diagram is crucial for understanding the melting and solidification behaviors of Cu-Ni alloys, which is vital for applications requiring controlled alloying and thermal properties.
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