|About this Abstract
||2023 TMS Annual Meeting & Exhibition
||Late News Poster Session
||L-62: Characterization of Precipitate Size Distribution in Friction-stir Processed Al-7085 Using Small-angle X-ray Scattering and Correlative Microscopy Techniques
||Rakesh R. Kamath, Jonova Thomas, Hrishikesh Das, Tanvi Ajantiwalay, Julian Escobar, Jia Liu, Jan Ilavsky, Piyush Upadhyay, Mert Efe, Arun Devaraj, Dileep Singh
|On-Site Speaker (Planned)
||Rakesh R. Kamath
Friction stir processing (FSP) is a versatile method which allows for localized property modification as demanded by the end application. In the present study, Al7085 alloy sheets were subjected to FSP as a function of various process parameters (rotation speed and toolhead velocity), a certain combination of which resulted in higher bendability. It is well known that bendability/formability in Al-alloys is significantly affected by the nature of the precipitates/dispersoids present. Results from correlative microscopy tools (atom probe tomography (APT) and transmission electron microscopy (TEM)) revealed that the volume fraction of Al3Zr dispersoids and MgZn2 precipitates varied considerably in different process-affected zones. To characterize these precipitates/dispersoids in a statistically significant volume, combined ultra-small-angle (USAXS), small-angle (SAXS) and wide-angle (WAXS) x-ray scattering measurements were performed at beamline 9-ID-C, APS. The size and number density obtained from the SAXS analyses were in-line with the microscopy results and the trends seen in bendability.