Abstract
The results of constant load creep tests on AISI 304 stainless steel at 873 and 973 K for different test conditions were found to obey first order reaction rate theory first proposed by Webster, Cox and Dorn. The transient creep parameters ϵ T and K were found to have different values in the two stress regimes where the variation of ϵ dot s with stress ( ϵ dot s = Aσ n ) show different values of exponents. For a given set of n, ϵ T and K, the transient and steady state creep obeying same kinetics law, could be described by unique master creep curve. A new relation between ϵ dot s, time for onset of steady state t os and limiting transient creep strain ϵ T is proposed as ( ϵ dot s α · t os )/ϵ T = constant ; this relation along with Monkman-Grant and modified Monkman-Grant relations are tested for all test conditions. Further it is postulated that the values of α and m ( m is the exponent for ϵ dot s in Monkman-Grant relation) equal to unity is a consequence of first order kinetics and that the concept of Monkman-Grant relation extends to totality of deformation and fracture.
Sign-in/Register to access full text options 
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 callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
