A 701 mm long bar made from a high temperature Nickel based alloy is loaded in constant tensile stress at a temperature of 943 C and undergoes steady state creep deformation. After a period of 418 hours it was found to have increased to a length of 707 mm.

Ignore instantaneous and stage 1 creep effects. The activation energy for creep in this case is 179 kJ/mol. (R = 8.314 J/mol K).

What is the creep rate at 943C in (10^-3 % per hour)?

Write the number in the textbox below as x 10^-3 % per hour (do not include the "x 10^-3 % per hour").

e.g. if your answer is 1.427 x 10^-3 % per hour, write 1.427 in the textbox below