Abstract
A new dislocation density based constitutive model for fcc single crystals at elevated temperatures is developed. In addition to former composite models [Acta Mater 48 (2000) 4181; J Mater Proc Technol 123 (2002) 155; Acta Metall Mater 41 (1993) 589; Acta Metal 31 (1983) 1367] it distinguishes the individual slip systems and thus directly accounts for latent hardening. This distinction is an essential prerequisite for a later implementation into crystal plasticity finite element models. The model is applied to hot compression tests of aluminium single crystals with their 〈1 1 0〉 axis parallel to the compression axis. The predicted stress strain curves fit the experimental observations very well for a strain rate range from 1×10 −5 to 1×10 −1 s −1 and a temperature range from 623 to 723 K using a single set of parameters.
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.
