Effect of Temperature on Creep Crack Growth

[+] Author and Article Information
V. M. Radhakrishnan, A. J. McEvily

Metallurgy Department, University of Connecticut, Storrs, Conn. 06268

J. Eng. Mater. Technol 102(4), 350-355 (Oct 01, 1980) (6 pages) doi:10.1115/1.3224823 History: Received December 31, 1979; Online September 15, 2009


Investigations have been carried out to study the effect of temperature on crack growth under creep condition in 6061 Al alloy. A parameter approach, connecting the three variables - crack growth rate ȧ, the load point deflection rate Δ̇ and the applied load P - given in the form

ȧ ∝ Δ̇/PPoα1/θ
where α, θ, and Po are constants, has been found to give good correlation with the experimental data. The exponents, α and θ, are dependent on temperature. The activation energy for the crack growth process has been found to be around 24 Kcal/mole.

Copyright © 1980 by ASME
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