Abstract
This paper studies the formation mechanism of fine granular area (FGA) in high-strength steels and predicts the threshold value of its formation. Fatigue experiments are carried out by using rotating bending and ultrasonic fatigue testing machines on a high carbon chromium steel (GCr15) with three different heat treatments. The results show that the range of stress intensity factor at the periphery of FGA (Delta K(FGA)) keeps constant with an average value of 5.2 MPa m(1/2), which is close to the traditional crack growth threshold (Delta K(th,0)), 5.0 MPa m(1/2). A theoretical model based on the plastic zone at crack tip is proposed to predict the value of Delta K(FGA) and the predictions are in good agreement with experimental data. (C) 2011 Elsevier B.V. All rights reserved.
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.
