A Critical Analysis of Crack Growth in Creep

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

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

J. Eng. Mater. Technol 102(2), 200-206 (Apr 01, 1980) (7 pages) doi:10.1115/1.3224798 History: Received August 22, 1979; Online September 15, 2009


Experimental investigations have been carried out to study the crack growth behavior in creep in a 6061 Al alloy. The crack growth rate is analyzed by the stress intensity factor, reference stress, energy rate line integral C* and modified J integral method and a critical examination is made of the applicability of different procedures. Based on the experimental observations near the crack zone, a new parameter in the form [Δ̇ / (P/P0 )α ], where Δ̇ is the deflection rate, P the applied load and the exponent α and P0 are constants, is proposed to describe the crack growth behavior in ductile materials.

Copyright © 1980 by ASME
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