Abstract
Friction stir processing has been conducted on both solid-solution strengthened and precipitation-strengthened nickel base alloys. All processing was conducted using a W-25Re tool material with a small cone angle. Processing depths were on the order of 2mm. Processing windows for Alloys 625, 718 and Hastelloy X were established in terms of processing speed and spindle rotation. Process forces and processing temperatures measured using embedded thermocouples are reported. Microstructure characterization revealed a dramatic decrease in grain size as a result of processing. Additive friction stir processing was conducted by depositing a precipitation hardenable Alloy 282 filler metal on an Alloy 600 substrate and then using friction stir processing to modify the as-welded microstructure. High resolution characterization indicated that gamma-prime precipitates were present in the as-processed layer and that large increases in hardness (strength) could be achieved by an aging heat treatment relative to the welded and aged condition.
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
More From: Proceedings of the 1st International Joint Symposium on Joining and Welding
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.