|
| Abstract No.: |
|
Scheduled at:
|
Thursday, June 11, 2020, Hall G1 2:40 PM
Process Diagnostics, Sensors & Controls
|
|
| Title: |
Particle velocimetry in cold spray and the pathway to a complete understanding of the data
|
|
| Authors: |
Ozan Ozdemir* / Northeastern University, United States of America
Sinan Muftu/ Northeastern University, United States
|
|
| Abstract: |
Cold spray (CS) additive manufacturing is increasingly finding its use across many industries. The implementation of the technology in the production and repair of products create a demand for the integration of reliable quality control and process monitoring measures. In this regard, particle impact velocity and size are undoubtedly the most important control parameters in CS, and a few systems are now commercially available for in-flight measurements. These velocity measurement techniques have a great potential to be used as a diagnostic tool. However, post processing the velocimetry data is required in many instances for achieving a complete understanding of the particle flow field. In this study, a pathway is presented for a comprehensive understanding of the entire particle flow field taking 6061 aluminum powder as an example case. In-flight particle flow conditions are measured using an Oseir HiWatch HR1 velocimeter in high Reynolds number helium and nitrogen jets generated by a VRC Gen III cold spray system. The powder particle size distribution (PSD) collected by the velocimeter is compared by measurements from a high-resolution optical microscope. The differences in the PSD data and the positional information are then statistically analyzed to capture a full picture of the particle flow field. 3D computational fluid dynamics simulations are then used to get a close approximation of the particle thermal and near impact conditions.
|
|