|About this Abstract
||2018 TMS Annual Meeting & Exhibition
||High Entropy Alloys VI
||Resistance Spot Welding of Dissimilar FeCoNiCrCu0.5 High Entropy Alloys-to-AISI 304L Stainless Steel: Microstructural Evolution and Metallurgy Mode Analysis
||Jia-Chi Li, Chun-Ming Lin, Cheng-Shun Chen
|On-Site Speaker (Planned)
The paper addresses the microstructural evolution and metallurgy mode analysis for dissimilar resistance spot welding (RSW) of FeCoNiCrCu0.5 high entropy alloys (HEAs) and AISI 304L stainless steels (SS), and three different types of welding metallurgy in welded joints were investigated by optical microscopy (OM), scanning electron microscopy(SEM) and electron back-scattered diffraction (EBSD). Thus, microstructural examination by OM, SEM and EBSD revealed that pre-existing Cu-rich phases in the base metal microstructure of the FeCoNiCrCu0.5 HEAs were responsible for changing the nature of solid state phase transformations in heat affected zone and columnar to equiaxed transition grain structure in fusion zone due to heterogeneous nucleation. Moreover, it was found that simultaneous occurrence of constitutional liquation of these Cu-rich phases as well as grain boundary sweeping mechanisms led to grain boundary liquation in the heat affected zone of the investigated AISI 304L SS.
||Planned: Supplemental Proceedings volume