The GH3536 (Hastelloy X) superalloy is one of the most widely used Ni-based sheet alloys for gas turbine hot parts. To investigate its relationship among processing, microstructure, and mechanical properties, alloy was fabricated from pure constituent elements by arc melting drop casting. drop-cast ingots were homogenized, cold rolled, recrystallized to obtain single-phase microstructure with a...

Air plasma sprayed (APS) coatings provide an ability to deposit a range of novel fuel cell materials at competitive costs. This work develops three separate types of composite anodes (Mo-Mo2C/Al2O3, Mo-Mo2C/ZrO2, Mo-Mo2C/TiO2) using a combination of APS process parameters on Hastelloy ® X for application in intermediate temperature proton conducting solid oxide fuel cells. Commercially availabl...

Abstract Laser powder bed fusion (LPBF) has great potential for the fabricating complex geometries with improved functionality. In combination nickel alloys such as Hastelloy X, parts produced this technology find usage in high-temperature applications. Many studies have focused on microstructure of X fabricated via LPBF technology, but most been performed simple cubic geometries. Considering a...

Hastelloy X (HX) is a Ni-based superalloy which suffers from high crack susceptibility during the laser powder bed fusion (LPBF) process. In this work, the microstructure of as-built HX samples was rigorously investigated to understand the main mechanisms leading to crack formation. The microstructural features of as-built HX samples consisted of very fine dendrite architectures with dimensions...

Ni/Co-modified aluminide coatings were prepared on Hastelloy-X superalloy by a combined process of electrodeposition and slurry aluminizing. In this regard, pure layers Ni Ni-50wt.%Co initially applied via successive aluminization was carried out technique. The microstructural chemical composition characterization the specimens revealed that compact dense coating formed with two-layered structu...