Journal
JOURNAL OF MANUFACTURING PROCESSES
Volume 53, Issue -, Pages 238-249Publisher
ELSEVIER SCI LTD
DOI: 10.1016/j.jmapro.2020.02.022
Keywords
Ball milling; Reactive multilayers; Plastic deformation; Diffusion penetration; Multivariable control
Categories
Funding
- Khalifa University Internal Research Fund (Level 1) award
Ask authors/readers for more resources
In reactive bimetallic compounds such as Ni-Al multilayers, desirable thermo-kinetic properties upon ignition require simultaneously controlled geometric microstructure and material composition. This article establishes fundamental dynamical models of plastic deformation and material diffusion in ball milling processing of particulates from Ni and Al powders, for the purpose of designing and implementing feedback control strategies for process control. The role of heat dissipation from plastic yield and friction slip in affecting compressibility and diffusivity of the material is elucidated. The different sensitivity of compressibility and diffusivity to thermal power is exploited by introducing multivariable control of both bilayer thickness and penetration depth simultaneously, using a real-time computational model as an observer with adaptation informed by infrared measurements of external vial temperature. The proposed control scheme is tested on a laboratory low-energy ball milling system and demonstrated to effectively modulate power intensity and process duration to obtain the desired microstructure and material composition.
Authors
I am an author on this paper
Click your name to claim this paper and add it to your profile.
Reviews
Recommended
No Data Available