The Ni-based Hastelloy X (HX) superalloy is widely used in aero-engine components because of its exceptional high-temperature strength and oxidation resistance. Given the complex structure such parts, additive manufacturing (AM) technologies as laser powder bed fusion (LPBF) are employed to manufacture these components. HX alloy suffers from crack susceptibility during LPBF process, however. In...

Cold gas dynamic spray (CS) is a unique technique for depositing material using high-strain-rate solid-state deformation. A major challenge this its dependence on the powder’s properties, and another lack of standards assessing them between lots manufacturers. The motivation research was to understand variability in powder atomization techniques stainless steel powders their subsequent properti...

Hot compression tests were conducted using a Gleeble 3500 thermomechanical simulator at temperatures ranging from 1,000 to 1,200°C with the strain rate 0.1 10 s −1 . Electron backscatter diffraction (EBSD) technique was employed by investigating microstructure evolution during hot deformation. Microstructure observations reveal that deformation and rates have significant effect on DRX process. ...

This research, for the first time, conducted a comprehensive study into effect of modern Severe Plastic Deformation technique, “Indirect Extrusion Angular Pressing (IEAP)”, on microstructural refinement niobium and subsequent impact tribological properties. The samples were processed 4, 9, 12 passes IEAP then exposed to Pin-on-disk wear test in dry sliding conditions. results showed that grain ...

Abstract Tungsten is the leading plasma-facing material (PFM) for nuclear fusion applications. It faces severe operating conditions, including intense hydrogen plasma exposure and high-cycle transient heat loading, which create various defects in tungsten. Additionally, have often already been introduced during manufacturing. Little understood regarding synergistic effect of such on lifetime tu...

Extremely rapid heating and cooling rates during the additive manufacturing (AM) process generate complicated thermal cycles, which affect microstructure evolution ultimate mechanical properties of alloy. In this paper, FGH96 blocks with a height 6 mm were prepared by selective laser melting (SLM) was characterized scanning electron microscopy (SEM) transmission (TEM). Comparing specimens varyi...

Institut für Metallkunde und Metallphysik, RWTH Aachen, 52056 Aachen, Germany Carnegie Mellon University, Pittsburgh PA 15213, USA Abstract The migration of planar, symmetric tilt grain boundaries with different tilt axes was investigated. The driving force for the grain boundary migration was due to an external mechanical stress field. Low as well as high angle grain boundaries can move under ...