Multivariable control of ball-milled reactive material composition and structure

Publikationen: Beitrag in FachzeitschriftArtikelForschung(peer-reviewed)

Autoren

  • Matteo Aureli
  • Constantine C. Doumanidis
  • Aseel Gamal Suliman Hussien
  • Syed Murtaza Jaffar
  • Yiliang Liao
  • Claus Rebholz
  • Charalabos C. Doumanidis

Externe Organisationseinheiten

  • University of Nevada, Reno
  • Aristotle University of Thessaloniki
  • Khalifa University, Abu Dhabi
  • University of Cyprus
  • Nazarbayev University

Abstract

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.

Details

OriginalspracheEnglisch
Seiten (von - bis)238-249
Seitenumfang12
Fachzeitschrift Journal of manufacturing processes
Jahrgang53.2020
AusgabenummerMay
Frühes Online-Datum25 Feb 2020
DOIs
StatusVeröffentlicht - Mai 2020