Abstract
In order to better understand the effect of fine Cu precipitates on the mechanical properties of body-centred-cubic (bcc) Fe, atomic simulations of bcc Fe with bcc Cu precipitates under mechanical loading were conducted by using the molecular dynamics (MD) method in conjunction with embedded atom method (EAM) potentials. The atomic configurations showed that all bcc Cu precipitates in bcc Fe matrices have the transformation tendency from bcc to 9R in the absence of external loading. When compressive stresses were loaded and reached a critical value, the transformation from bcc to the 9R variant occurred inside Cu precipitates, and these transformed Cu precipitates resulted in structure changes of matrix Fe. On the other hand, this kind of transformation did not take place under tensile stress. The corresponding internal stress fields around the distorted and transformed Cu precipitates were evaluated. It was found that the resolved shear stresses of the internal stress field on the main slip systems of bcc Fe are of the same order of magnitude as the yield stress of perfect single crystal Fe. This may affect the dislocation slip and contribute to material hardening.
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
More From: Modelling and Simulation in Materials Science and Engineering
Disclaimer: 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.