|About this Abstract
||2021 TMS Annual Meeting & Exhibition
||Additive Manufacturing Fatigue and Fracture V: Processing-Structure-Property Investigations and Application to Qualification
||Effect of Oxide and Hydroxide on Cold Spray of Titanium Particles
||Mobin Vandadi, Arvand Navabi, Trevor Bond, Nima Rahbar, Winston Soboyejo
|On-Site Speaker (Planned)
This paper presents results of a multi-scale study on mechanical behavior of Titanium powders in Cold Spray process. Effects of oxide and hydroxide layer on surface of particle are first studied using Molecular Dynamics simulations. Afterward, these results are used in Finite Element Simulation to study the cold spray process. Elastic moduli, toughness, and fracture energies of oxide and hydroxide layers are derived from MD and are input into FEA. Then, parameters such as particle size and oxide thickness are changed to understand their effect. A bi-linear Johnson-Cook model is used to predict deformation of Titanium and brittle cracking method is used for oxide and hydroxide parts. Results show that there is a portion of oxide and hydroxide layer which does not fail during the impact. Size of trapped section is computed as a function of other parameters. This result has important implications in the robustness of cold sprayed part.
||Additive Manufacturing, Titanium, Computational Materials Science & Engineering