# Norton-Bailey Creep Rate

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**Formula:**`ε̇ = A σ^n e^(-Q/RT)`

## Introduction to Norton-Bailey Creep Rate

The creep rate, represented as ε̇, is commonly used to estimate the deformation over time under a constant stress at high temperatures. The Norton-Bailey law is a phenomenological relation that describes creep behavior with three material constants: A, n, and Q. Here, σ represents the applied stress, n is the stress exponent, Q is the activation energy for creep, R is the gas constant, and T is the absolute temperature.

## Parameter Usage:

`stress`

= applied stress on the material`temperature`

= temperature at which the material is under stress

## Output:

`creep rate`

= estimated deformation rate of the material under constant stress

## Data Validation

Both the stress and temperature should be greater than zero. Material constants A, n, and Q are needed to compute the actual creep rate.

## Summary

This calculator is designed to provide an interface for the calculation of creep rate using the Norton-Bailey law, but requires the user to input specific material constants to get a quantitative result.

Tags: Materials Science, Creep Rate, Norton Bailey, High Temperature