Abstract
Abstract To examine the effect of creep deformation rate on crack growth, an analytical relationship between the kinetics of crack growth in an inert environment and the deformation kinetics is developed by combining a tensile ligament instability model for crack growth with Hart's model for uniaxial creep deformation. The modified model was examined in terms of the steady state creep and crack growth data of Landes and Wei on AISI 4340 steel at 297, 353 and 413 K (i.e. below the homologous temperature of about 450 K). The model was found to be effective in describing the crack growth response at high stress intensity factor K levels and showed a threshold crack growth behavior at lower K levels. Changes in crack growth response with deformation mechanism and the need for additional experimental confirmation are discussed.
Sign-in/Register to access full text options 
Free) 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a call
