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Home  >  Journal list  >  MATERIALS TRANSACTIONS  >  Vol.48  No.9 (2007)  >  pp.2316-2318

MATERIALS TRANSACTIONS
<<Previous article Vol.48  No.9 (2007)   pp.2316 - 2318 Next article>>

Inconel 690 Alloy Crystal Growth Orientation under Different Vibration Waveforms

Che Wei Kuo1), Ming Che Chen1), Jie Hao Chen1), Gen-Huey Lai1), Yung-Tse Chang1), Yu-Che Chen1) and Weite Wu1)
1) National Chung Hsing University, Department of Materials Science and Engineering

The crystal growth orientation of Inconel 690 alloy solidified under the application of additional kinetic energy was studied. By using an eccentric-mass electric motor for transmitting the kinetic energy to a melting pool, liquid atoms attained kinetic energy that enabled them to strike the solid-liquid interface during solidification. Due to unequal upper and lower amplitudes of the waveform, three types of states of the applied kinetic energy were discussed: (1) the kinetic energy required for the attachment of an atom is greater than that for detachment, (2) the kinetic energy for attachment is less than that for detachment, and (3) the kinetic energy for attachment is equal to that for detachment. The results reveal that unequal kinetic energies for attachment and detachment will encourage epitaxial growth in the (100) direction. Only when the kinetic energies for atom’s attachment and detachment are equal will the degree of epitaxial growth in the (100) direction will decrease.


Keyword:
crystal structure, vibration, X-ray diffraction, solidification, Inconel 690 alloy

Received: June 06, 2007
Accepted: July 03, 2007 , Published online: August 25, 2007
Copyright (c) 2007 The Japan Institute of Metals

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