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Ralph E. Napolitano
Ames Laboratory-USDOE
Associate Scientist
Solidification Science Focus Area
Iowa State University
Associate Professor
Materials Science and Engineering
204A Wilhelm
Tel: 515-294-9101
Fax: 515-294-4291

B.S. 1989, University of Florida; M.S., 1994, Georgia Institute of Technology; Ph.D., 1996, Georgia Institute of Technology; Research Engineer, Babcock & Wilcox Research and Development Division, 1989-92; NRC Post Doctoral Research Fellow, National Institute of Standards and Technology, 1996-98; Associate Scientist, Ames Laboratory, 1998-present; Assistant Professor, Materials Science and Engineering, Iowa State University, 2000-05; Associate Professor, Materials Science and Engineering, Iowa State University, 2005-present.

Primary research interests lie in the fundamentals of physical metallurgy with particular emphasis on solidification and solid-liquid interfacial phenomena. Current research efforts include theoretical, computational, and experimental investigations of interfacial behavior. Topics include: properties of crystal-melt interfaces, morphological stability and dynamics of structural transitions, dynamic control of solidification microstructures.

R.E. Napolitano and S. Liu
“The 3D crystal-melt Wulff-shape and interfacial stiffness in Al-Sn,” Phys. Rev. B, Vol. 70, 2141031 (2004).

R.E. Napolitano and H. Meco
“The role of melt-pool behavior in free-jet melt spinning,” Metall. Mater. Trans., Vol. 35A, 1539 (2004).

R.E. Napolitano, H. Meco, and C. Jung
“Faceted solidification morphologies in Al-Si eutectics at low growth rates,” J. Metals, Vol. 56 (4), 16 (2004).

R.E. Napolitano and D.R. Black
“Array ordering in dendritic crystals and the influence on crystal perfection,”
J. Mater. Science, Vol. 39, 1 (2004).

H. Meco and R.E. Napolitano
“Liquidus and solidus boundaries in the vicinity of order-disorder transitions in the Fe-Si system,” Scripta Mater., Vol. 52, 221 (2004).


  • Chair, TMS Solidification Committee, 2003-04
  • Editorial Board Key Reader, Metallurgical and Materials Transactions, 2004-present
  • Excellence in Research Award, Iowa State University, MSE Department, 2004
  • Vice Chair, Solidification Committee, The Minerals, Metals, and Materials Society, 2002
  • Chair, ASM International, Central Iowa Chapter, 2000-01
  • Council of Outstanding Young Engineering Alumni, Georgia Institute of Technology, 2000
  • Outstanding Doctoral Thesis Award, Sigma Xi, Scientific Research Society, 1996