| About this Abstract |
| Meeting |
2020 TMS Annual Meeting & Exhibition
|
| Symposium
|
Advancing Current and State-of-the-Art Application of Ni- and Co-based Superalloys
|
| Presentation Title |
Friction Stir Welding of Inconel 825 Alloy |
| Author(s) |
Hrishikesh Das, Mounarik Mondal, Jiwoo Lee, Hoon-Hwe Cho, Sung-Tae Hong |
| On-Site Speaker (Planned) |
Hrishikesh Das |
| Abstract Scope |
Friction stir butt welding of inconel 825 alloy has been successfully performed without any microscopic defects. FS welded region consists of mixed pattern with two different regimes: bright region and black banded region. Microstructure and precipitation behavior of both regions have been characterized by SEM, EBSD and TEM assisted EDS analysis. EBSD analysis confirms that stir zone exhibited dynamic recrystallized structure and grain boundary mapping corroborated that no significant changes in the fraction of low and high angle boundaries between SZ, TMAZ and base metal. The frequency of CSL greatly diminished from BM to SZ and TMAZ. TEM analysis shows that nano twins and nano size precipitations dispersed in the grains as well as at the grain boundaries. Grain refinement and nano size precipitations formation at FSW region, enhanced mechanical properties such as micro hardness and tensile strength (all the samples are failed from the BM) to significant amount. |
| Proceedings Inclusion? |
Planned: Supplemental Proceedings volume |