Modeling the Melting and Dissolution Stages During Thermal Processing of Intermetallic Coatings from Layered Precursors

[+] Author and Article Information
Marios Alaeddine

Department of Mechanical Engineering, Tufts University, Medford, MA 02155

Rajesh Ranganathan, Teiichi Ando

Department of Mechanical, Industrial and Manufacturing Engineering, Northeastern University, Boston, MA 02115

Charalabos C. Doumanidis

Department of Mechanical and Manufacturing Engineering, University of Cyprus, Nicosia, 1678, Cyprus

J. Manuf. Sci. Eng 127(1), 148-156 (Mar 21, 2005) (9 pages) doi:10.1115/1.1830052 History: Received December 08, 2003; Revised April 09, 2004; Online March 21, 2005
Copyright © 2005 by ASME
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Schematic of the thermal processing technique
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Schematic of the thermal processing of the Ni–Al coating
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Front view of the melting interface for an element located at (ψ,ζ=0)
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Schematic representation of the heat input distributions on the coating and substrate
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Schematic representation of the motion of the Ni-Al melting front
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Optical micrograph of the cross section of the pre-plated precursor
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Plasma arc welding station setup
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Cross sectional SEM micrograph of (a) specimen 1 and (b,c) specimen 2 (refer to Table 1). (a) Power=550 W. (b) Power=880 W. (c) Power=880 W (off-center).
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Temperature variation in the Al–Ni layer and motion of the melting front for processing conditions listed in Table 1. (a) Simulated and experimental (actual) temperature curves for Q=550 W. (b) Simulated and experimental (actual) temperature curves for Q=880 W. (c) Displacement of the melting front x̄(t).
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Control scheme for in-process estimation of the material structure




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