Engineering, 03.12.2019 06:31 bibigardeax
An alloy is evaluated for potential creep deformation in a short-term laboratory experiment. the creep rate is found to be 1% per hour at 800°c and 0.055% per hour at 700°c.
(a) calculate the activation energy for creep in this temperature range.
(b) estimate the creep rate to be expected at the service temperature of 500°c.
Answers: 2
% per hr
% per hr
= 
![\frac{1\%}{5.5 \times 10^{-2}\%} = e^{[\frac{-Q}{R(800+273)}] -[\frac{-Q}{R(800+273)}]}](/tpl/images/0400/6675/a53ca.png)
![\frac{0.01}{5.5\times 10^{-4}} = ln [e^{\frac{Q}{8.314}[\frac{1}{1073} - \frac{1}{973}]}]](/tpl/images/0400/6675/5fe76.png)
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An alloy is evaluated for potential creep deformation in a short-term laboratory experiment. the cre...
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