Microstructure and tensile properties of Ti–48Al–2Cr–2Nb (at%) rods fabricated by electron beam powder bed fusion (EB-PBF) process were investigated changing input energy density (ED) which is one the important factors affecting formation melt pool. We found that unique layered microstructure consisting an equiaxed γ grain layer (γ band) a duplex region can be formed EB-PBF with ED in range 13 ...

Abstract The Moran komatiite-hosted Ni sulfide deposit at Kambalda (Australia) is one of the better preserved orebodies Kambalda. Its geochemical signature used to investigate evolution mineralization. orebody has several parts, including a flanking segment where massive sulfides formed relatively early and central portion in 40-m-deep erosional embayment representing later generation net-textu...

Laser polishing (LP) is an effective method to improve the surface quality of additively manufactured nickel-based alloy. In this paper, in-situ laser (ILP) experiment performed on selective melting (SLM) IN718 samples. The white light interferometer used test three-dimensional profile and roughness results show that as-SLMed samples by ILP improved. particular, decreased 33.5%. To reveal mecha...

Al assisted alloying of carbon steel in Submerged Arc Welding (SAW) by Al-Cr-Ti-Cu unconstrained metal powders is applied. A base case without powder additions compared to two addition schedules, Al-Cu-Ti and Al-Cu-Ti-Cr. used as a deoxidiser element control the oxygen partial pressure at weld pool–molten flux interface ensure that most Ti Cr transferred into pool ppm O controlled within accept...

Abstract The crystallographic textures produced during additive manufacturing can be understood, predicted, and manipulated by varying the grain nucleation growth processes. resultant are primarily dictated melt pool geometry, which defines local thermal gradient thus preferred crystal directions, as well scan strategy, controls propagation of orientations into subsequent layers. This texture d...

This study described the natural circulation and heat transfer of a molten pool in specifically designed core catcher conceived for pressurized water reactor. In addition to external cooling, features internal cooling tubes embedded pool. To investigate coolability such configuration, first, full-scale simulation is conducted give preliminary under real SA situation. Results illustrated that ef...

Over the past few decades, there has been much research on additive manufacturing in both academic and industrial spheres to overcome limitations of conventional methods, thereby enabling production complex designs for improved performance. To achieve this purpose, it is crucial meticulously set suitable laser parameters within context microstructural characteristics, including type fraction de...

Abstract Impacts may have had a significant effect on the atmospheric chemistry of early Earth. Reduced phases in impactor (e.g., metallic iron) can reduce planet’s H 2 O inventory to produce massive atmospheres rich . While previous studies focused interactions between and atmosphere such scenarios, we investigate two further effects: (1) distribution impactor’s iron during impact target inter...

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...