Abstract
Dislocation properties have been studied in several L12 nickel-based alloys with high (Ni74Al26), medium (Ni3(Al, 0.25% Hf)), and low (Ni3Ga) antiphase boundary (APB) energies respectively, deformed in the temperature domain of the yield-stress anomaly. Several APB energies have been measured and compared with those found in the literature. The peak in the temperature variation of the strain-hardening coefficient has been correlated with the unlocking of incomplete Kear–Wilsdorf locks. The corresponding unlocking stresses, as well as the frequencies of octahedral-cube and cube-octahedral cross-slip, are strongly correlated with the respective fault energies. The local pinning of near-edge dislocations in cube planes appears essential for the observation of the yield-stress anomaly in alloys with high APB energies.
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
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.