(a)
Interpretation:
Whether A-10% B alloy is a good option for age hardening or not needs to be determined. If it is a good option, the required heat treatments with appropriate tempertures need to be explained.
Concept introduction:
Phase is defined as the homogeneous portion of the system having same physical and chemical characteristics.
A diagram which defines the existence of different phases of a system under equilibrium is known as phase diagram. It gives the relationship between composition and temperature.
The phase diagram is shown in figure,
Phase diagram represents the relation between composition of components in weight percent and temperature.
Answer to Problem 12.46P
The equivalent temperature range for heat treatment of alloy composed of 
is
Age hardening temperature should be below 
Explanation of Solution
Given information:
Alloy composed of 
Based on given information, using graph to determine the temperature,
The equivalent temperature range for heat treatment of alloy composed of 
is
Age hardening temperature should be below 
(b)
Interpretation:
Whether A-20% B alloy is a good option for age hardening or not needs to be determined. If it is a good option, the required heat treatments with appropriate temperatures need to be explained.
Concept introduction:
Phase is defined as the homogeneous portion of the system having same physical and chemical characteristics.
A diagram which defines the existence of different phases of a system under equilibrium is known as phase diagram. It gives the relationship between composition and temperature.
The phase diagram is shown in figure,
Phase diagram represents the relation between composition of components in weight percent and temperature.
Answer to Problem 12.46P
The equivalent temperature range for heat treatment of alloy composed of 
is
Age hardening temperature should be below 
Explanation of Solution
Given information:
Alloy composed of 
Based on given information, using graph to determine the temperature,
The equivalent temperature range for heat treatment of alloy composed of 
is
Age hardening temperature should be below 
(c)
Interpretation:
Whether A-55% B alloy is a good option for age hardening or not needs to be determined. If it is a good option, the required heat treatments with appropriate tempertures need to be explained.
Concept introduction:
Phase is defined as the homogeneous portion of the system having same physical and chemical characteristics.
A diagram which defines the existence of different phases of a system under equilibrium is known as phase diagram. It gives the relationship between composition and temperature.
The phase diagram is shown in figure,
Phase diagram represents the relation between composition of components in weight percent and temperature.
Answer to Problem 12.46P
The equivalent temperature range for heat treatment of alloy composed of 
is 
and alloy structure will be in brittle form.
Explanation of Solution
Given information:
Alloy composed of 
Based on given information, using graph to determine the temperature,
The equivalent temperature range for heat treatment of alloy composed of 
is 
and alloy structure will be in brittle form.
(d)
Interpretation:
Whether A-87% B alloy is a good option for age hardening or not needs to be determined. If it is a good option, the required heat treatments with appropriate temperatures need to be explained.
Concept introduction:
Phase is defined as the homogeneous portion of the system having same physical and chemical characteristics.
A diagram which defines the existence of different phases of a system under equilibrium is known as phase diagram. It gives the relationship between composition and temperature.
The phase diagram is shown in figure,
Phase diagram represents the relation between composition of components in weight percent and temperature.
Answer to Problem 12.46P
The equivalent temperature range for heat treatment of alloy composed of 
is 
and alloy is cooled and transformed to single phase region.
Explanation of Solution
Given information:
Alloy composed of 
Based on given information, using graph to determine the temperature,
The equivalent temperature range for heat treatment of alloy composed of 
is 
and alloy is cooled and transformed to single phase region.
(e)
Interpretation:
Whether A-95% B alloy is a good option for age hardening or not needs to be determined. If it is a good option, the required heat treatments with appropriate temperatures need to be explained.
Concept introduction:
Phase is defined as the homogeneous portion of the system having same physical and chemical characteristics.
A diagram which defines the existence of different phases of a system under equilibrium is known as phase diagram. It gives the relationship between composition and temperature.
The phase diagram is shown in figure,
Phase diagram represents the relation between composition of components in weight percent and temperature.
Answer to Problem 12.46P
The equivalent temperature range for heat treatment of alloy composed of 
is 
and alloy contains only single phase so it cannot be age hardened.
Explanation of Solution
Given information:
Alloy composed of 
Based on given information, using graph to determine the temperature,
The equivalent temperature range for heat treatment of alloy composed of 
is 
and alloy contains only single phase so it cannot be age hardened.
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Chapter 12 Solutions
Essentials of Materials Science and Engineering, SI Edition
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