Steady-state creep rate data are given here for a metal alloy. R = 8.3145 J/mol-K. T (°C) È, (h-1) 0.6x104 1.1x104 0.9x10-3 о (MPа) 150 550 150 250 750 750 (a) Calculate the activation energy for creep (Qc) in J/mol assuming stress exponent n is independent of temperature. (b) Estimate the creep strain rate at 500 °C when a constant strain of 100 MPa was applied to the same material.

Steady-state creep rate data are given here for a metal alloy. R = 8.3145 J/mol-K. T (°C) È, (h-1) 0.6x104 1.1x104 0.9x10-3 о (MPа) 150 550 150 250 750 750 (a) Calculate the activation energy for creep (Qc) in J/mol assuming stress exponent n is independent of temperature. (b) Estimate the creep strain rate at 500 °C when a constant strain of 100 MPa was applied to the same material.

Elements Of Electromagnetics

7th Edition

ISBN:9780190698614

Author:Sadiku, Matthew N. O.

Publisher:Sadiku, Matthew N. O.

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Concept explainers

Thermal Properties of Materials

In mechanical engineering, the thermal property is represented as the physical quantity that is relevant to the application of heat. The thermal properties are evaluated by variations in any specific material due to low heat or high heat. The quantities that influence the thermal property of the materials are mass, density, temperature, and many others.

Question

Steady-state creep rate data are given here for a metal alloy. R = 8.3145
J/mol-K.
%3D
T (°C)
550
È, (h-1)
0.6x104
1.1x104
0.9x103
σ(MPa)
150
150
750
250
750
(a) Calculate the activation energy for creep (Qc) in J/mol assuming stress
exponent n is independent of temperature.
(b) Estimate the creep strain rate at 500 °C when a constant strain of 100
MPa was applied to the same material.

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