Answer :
Answer:
The creep temperature for different materials is as follows.
A. Nickel :- [tex]T_{c}[/tex] = 690.4 K
B. Copper :- [tex]T_{c}[/tex] = 542.8 K
C. Iron :-[tex]T_{c}[/tex] = 723.6 K
D. Tungsten :-[tex]T_{c}[/tex] = 1469.2 K
E. Lead :- [tex]T_{c}[/tex] = 240.2 K
F. Aluminium :- [tex]T_{c}[/tex] = 373.2 K
Explanation:
Creep is the slow plastic deformation occur at high elevated temperature.
The approximate temperature for different metals is as follows at which creep becomes considerable.
A. Nickel :- The relation between melting temperature & creep temperature is given by the formula.
[tex]T_{c} = 0.4 T_{m}[/tex]
The melting temperature of nickel = 1726 K
Creep temperature [tex]T_{c}[/tex] = 0.4 × 1726
[tex]T_{c}[/tex] = 690.4 K
B. Copper :- The relation between melting temperature & creep temperature for copper is given by the formula.
[tex]T_{c} = 0.4 T_{m}[/tex]
The melting temperature of copper = 1357 K
Creep temperature [tex]T_{c}[/tex] = 0.4 × 1357
[tex]T_{c}[/tex] = 542.8 K
C. Iron :- The relation between melting temperature & creep temperature for iron is given by the formula
[tex]T_{c} = 0.4 T_{m}[/tex]
The melting temperature of iron = 1809 K
Creep temperature [tex]T_{c}[/tex] = 0.4 × 1809
[tex]T_{c}[/tex] = 723.6 K
D. Tungsten :- The relation between melting temperature & creep temperature for tungsten is given by the formula
[tex]T_{c} = 0.4 T_{m}[/tex]
The melting temperature of iron = 3673 K
Creep temperature [tex]T_{c}[/tex] = 0.4 × 3673
[tex]T_{c}[/tex] = 1469.2 K
E. Lead :-The relation between melting temperature & creep temperature for lead is given by the formula
[tex]T_{c} = 0.4 T_{m}[/tex]
The melting temperature of lead = 600.5 K
Creep temperature [tex]T_{c}[/tex] = 0.4 × 600.5
[tex]T_{c}[/tex] = 240.2 K
F. Aluminium :- The relation between melting temperature & creep temperature for aluminium is given by the formula
[tex]T_{c} = 0.4 T_{m}[/tex]
The melting temperature of lead = 933 K
Creep temperature [tex]T_{c}[/tex] = 0.4 × 933
[tex]T_{c}[/tex] = 373.2 K