Computational Fluid Dynamics (CFD) simulations are used in this work to study the dynamic behavior of melt pool and heat transfer during single-track laser melting process a nickel-based superalloy (CMSX-4). To include effects powder inhomogeneities obtain realistic distribution layer on bed chamber, CFD model is coupled with Discrete Element Method (DEM) solver. The implemented open-source sof...

Abstract Single crystal Nickel-based superalloys exhibit an anomalous yield point, the stress increasing with temperature to a maximum at around 750 ºC. Here, we demonstrate in alloy CMSX-4 ºC that, although there is virtually no effect of strain rate on initial slow rates second mechanism can initiate leading considerable softening effect. By examining microstructures series interrupted tests,...

In this study we present a series of light-weight (6.24 to 6.42 g/cm3), Ti-rich Mo-Si-Ti alloys (?40 at.% nominal Ti content) with the hitherto best combination pesting and creep resistance at 800 1200 °C, respectively. This has been achieved by fine-scaled eutectic-eutectoid microstructures substantial fractions primarily solidified (Mo,Ti)5Si3. (Mo,Ti)5Si3 was found be oxidation-resistant in ...

Abstract Electron beam powder bed fusion (PBF-EB) of Ni-base superalloys such as CMSX-4 is a demanding process. Using conventional PBF-EB machines, process observation done by mounting optical camera systems on viewing windows at the top build chamber. However, concomitant metallization blocks methods with increasing time. Therefore, quality evaluation normally after utilizing visual inspection...