The use of supercritical carbon dioxide (sCO2) as a working fluid is garnering interest in next generation power production systems due to the possibility of increased operational efficiencies and lower associated costs. Its implementation requires alloys with excellent high temperature strength...

NiTi alloy exhibits superior superelastic properties but its wide application is limited by its poor workability. In this study, Ni-rich NiTi wire was used as the feedstock and a wall-shaped NiTi component with height of 130mm was deposited on Ti substrate by cold metal transfer (CMT) based wire...

This work proposes a new auxetic lattice based on replacing the vertexes of traditional three-dimensional re-entrant structural with self-similar configurations. Derived by Castigliano's second theorem, a theoretical model is built to predict its elastic mechanical properties, including the...

Absorbance is often used for simulations or validation of process parameters for powder-based laser materials processing. In this work, the absorbance of 39 different metal powders for additive manufacturing is determined at 20 different laser wavelengths. Different grain sizes and aging states...

Despite the flexibility offered by additive manufacturing (AM), various process factors ranging from design to material can lead to inconsistent repeatability and quality issues from build-to-build. Currently, AM process monitoring mainly focuses on gaining an understanding of physical phenomena...

In the present work, a novel Laser Directed Energy Deposition (LDED) process planning methodology is proposed to build a dome structure with variable overhang angles. Overhang structures with different overhang angles were built where the maximum angle of 35° can be used to build overhang...

In this study, a new grade of Inconel 718 alloy (IN718) strengthened by nano-oxides have been designed and produced. The alloy composition of 0.3 wt.% Y 2 O 3 – IN718 has been determined using CALPHAD based thermochemical modelling approach. Designed ODS-IN718 alloy is produced by Selective...

In this research, a room temperature multicycle nanoindentation technique was implemented to evaluate the effects of the laser peening (LP) process on the surface mechanical behavior of additively manufactured (AM) Inconel 625. Repetitive deformation was introduced by loading-unloading during an...

Additively manufactured superalloys have attracted increasing attention due to their inherent hierarchical microstructure, however are plagued by anisotropic properties originated from columnar grains. In this work, scandium was introduced as an oxide dispersion strengthener (ODS) into the...