|About this Abstract
||2017 TMS Annual Meeting & Exhibition
||Additive Manufacturing of Metals: Establishing Location-Specific Processing-Microstructure-Property Relationships
||A-31: Microstructure vs. Mechanical Properties for Different Al Alloys Deposited by Cold Spray Process
||Reza Rokni, Steve Nutt
|On-Site Speaker (Planned)
In cold spray process, coatings are produced by depositing powder particles at high velocity onto a substrate, creating bonding with the substrate at temperatures below the melting point of the powder particles. our investigations underscored the retaining of feedstock microstructures into deposits. However, metastable microstructures including high dislocation density, ultra fine grained, nano, and pancaked grained structures were observed through detailed microstructure characterization of different regions in the deposits. It was also found that those metastable microstructures remarkably affect the local deposition properties such as nanohardness. The evolution mechanisms of metastable microstructure in different cold sprayed aluminum depositions were examined via different microscopy techniques. Also, the microstructural stability of these metastable features were investigated by in-situ heating to a fully annealed state via a hot-stage transmission electron microscope.
||Planned: Supplemental Proceedings volume