TY - JOUR
T1 - Non-equilibrium microscale thermomechanical modeling of bimetallic particulate fractal structures during ball milling fabrication
AU - Aureli, Matteo
AU - Doumanidis, Constantine C.
AU - Gunduz, I. E.
AU - Hussien, Aseel Gamal Suliman
AU - Liao, Yiliang
AU - Jaffar, Syed Murtaza
AU - Rebholz, Claus
AU - Doumanidis, Charalabos C.
N1 - Publisher Copyright:
© 2017 Author(s).
PY - 2017/7/14
Y1 - 2017/7/14
N2 - Nanostructured bimetallic reactive multilayers can be conveniently produced by ball milling of elemental powders. This research explores the non-equilibrium microscale conductive thermal transport in ball-milled particulate fractal structures during fabrication, arising from heat dissipation by bulk plastic deformation and surface friction. Upon impactor collisions, temperature increments are determined at interface joints and domain volumes using Green's functions, mirrored by source images with respect to warped ellipsoid domain boundaries. Heat source efficiency is calibrated via laboratory data to compensate for thermal expansion and impactor inelasticity, and the thermal analysis is coupled to a dynamic mechanics model of the particulate fracture. This thermomechanical model shows good agreement with the fractal dimensions of the observed microstructure from ball milling experiments. The model is intended to provide a comprehensive physical understanding of the fundamental process mechanism. In addition, the model could serve as a real-time thermal observer for closed-loop process control, as well as for interfacial diffusion and reaction analysis during ball milling.
AB - Nanostructured bimetallic reactive multilayers can be conveniently produced by ball milling of elemental powders. This research explores the non-equilibrium microscale conductive thermal transport in ball-milled particulate fractal structures during fabrication, arising from heat dissipation by bulk plastic deformation and surface friction. Upon impactor collisions, temperature increments are determined at interface joints and domain volumes using Green's functions, mirrored by source images with respect to warped ellipsoid domain boundaries. Heat source efficiency is calibrated via laboratory data to compensate for thermal expansion and impactor inelasticity, and the thermal analysis is coupled to a dynamic mechanics model of the particulate fracture. This thermomechanical model shows good agreement with the fractal dimensions of the observed microstructure from ball milling experiments. The model is intended to provide a comprehensive physical understanding of the fundamental process mechanism. In addition, the model could serve as a real-time thermal observer for closed-loop process control, as well as for interfacial diffusion and reaction analysis during ball milling.
UR - http://www.scopus.com/inward/record.url?scp=85024091825&partnerID=8YFLogxK
U2 - 10.1063/1.4993174
DO - 10.1063/1.4993174
M3 - Article
AN - SCOPUS:85024091825
SN - 0021-8979
VL - 122
JO - Journal of Applied Physics
JF - Journal of Applied Physics
IS - 2
M1 - 025118
ER -