Year-end Sale % OFF 
Abstract
The stability of the long-range-ordered (LRO) γ′ phase was investigated in the temperature interval 100 K ⩽ T⩽773 K under 300 keV Ni + irradiation. The radiation-induced intensity changes of the L1 2 superlattice reflections were monitored by TEM technique using a computer assisted, quantitative evaluation of the amplitudes of diffraction patterns obtained by image plates. The dynamical diffraction theory where the thickness of the investigated foils was taken into account was employed to determine the degree of order from the diffraction patterns. The fluences were varied up to 10 dpa. The results are compared with recent measurements of disordered zone sizes after low dose ion irradiation in Ni 3Al. The measured temperature dependence below room temperature is consistent with the predictions of the thermal spike model for disordering, but for higher temperatures the results hint to a more complicated re-ordering process in disordered areas. A Ni 3Al specimen which was completely disordered after 10 dpa at 200 K was used for a thermal annealing experiment. The annealing behavior confirms the importance of the heterogeneous state of the order for the re-ordering process under ion irradiation.
Published Version
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.
