Give the approximate temperature at which creep deformation becomes an important consideration for each of the following metals:

a) nickel
b) copper
c) iron
d) tungsten
e) lead
f) aluminum

The creep temperature for different materials is as follows.

A. Nickel :- = 690.4 K

B. Copper :-   = 542.8 K

C. Iron :- = 723.6 K

D. Tungsten :- = 1469.2 K

E. Lead :- = 240.2 K

F. Aluminium :- = 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.

The melting temperature of nickel = 1726 K

Creep temperature = 0.4 × 1726

= 690.4 K

B. Copper :- The relation between melting temperature & creep temperature for copper is given by the formula.

The melting temperature of copper = 1357 K

Creep temperature = 0.4  × 1357

= 542.8 K

C. Iron :- The relation between melting temperature & creep temperature for iron is given by the formula

The melting temperature of iron = 1809 K

Creep temperature = 0.4  × 1809

= 723.6 K

D. Tungsten :- The relation between melting temperature & creep temperature for tungsten is given by the formula

The melting temperature of iron = 3673 K

Creep temperature = 0.4  × 3673

= 1469.2 K

E. Lead :-The relation between melting temperature & creep temperature for lead is given by the formula

The melting temperature of lead = 600.5 K

Creep temperature = 0.4  × 600.5

= 240.2 K

F. Aluminium :- The relation between melting temperature & creep temperature for aluminium is given by the formula

The melting temperature of lead = 933 K

Creep temperature = 0.4  × 933

= 373.2 K

can you make it more obvious. i can't see it properly