Abstract
Small-angle X-ray scattering (SAXS) is a technique which makes use of elastic scattering of X-ray radiation on inhomogeneities in electron density in the studied material In particular, a difference in chemical compositions between individual phases can be detected. In this research, SAXS was used to study the evolution of α particles in aged samples of a metastable β titanium alloy, Ti-6.8Mo-4.5Fe-1.5Al (LCB). In order to obtain scattering patterns for a known crystallographic orientation, the experiments were carried out on single crystals grown by a floating zone technique. Aged single-crystalline samples were measured in three different orientations, namely (001), (110) and (111) planes of the bcc β matrix oriented perpendicularly to the primary beam. Resulting scattering patterns exhibited symmetries which correlated with the orientation of the studied sample. A simple theoretical model was developed to interpret the shape and orientation of the observed scattering streaks. Good qualitative agreement between experimental data and simulation was found and the first results of the model are presented in this paper.
Highlights
We present results of a small-angle X-ray sca ering (SAXS) experiment which focused on characteriza on of α phase par cles and on inves ga on of their morphology with respect to different heat treatment condi ons
Our experiment was carried out at the Advanced Photon Source (APS; Argonne Na onal Laboratory, USA) at a dedicated ultra-small-angle X-ray sca ering (USAXS) facility at 15-ID beamline [21]
Measured sca ering pa erns exhibited characteris c streaks arising from the lamellar shape of α par cles, see Fig. 1, which shows sca ering pa ers arising from the sample aged at 510 °C for 0.5 h
Summary
In some metastable β tanium alloys, nanometre-sized par cles of metastable ω phase form during quenching. We present results of a small-angle X-ray sca ering (SAXS) experiment which focused on characteriza on of α phase par cles and on inves ga on of their morphology with respect to different heat treatment condi ons. SAXS is a non-destruc ve technique which provides informa on on inhomogenei es in electron density in the studied sample (in our case, a difference in the chemical composi ons of α phase par cles and the β matrix). Our previous SAXS studies focused on the inves ga on of ω phase and showed that ω par cles in aged tanium alloys are spa ally ordered in a cubic superla ce with the main axes parallel to β direc ons [11]. The sca ering angle was calibrated using a silver behenate standard [24]
Sign-in/Register to view highlights & summary 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.
