Influence of Forced Convection on Columnar Microstructure during Directional Solidification of Al - Ni Alloys

2006 ◽  
pp. 181-186
Author(s):  
Henri Nguyen-Thi ◽  
Bing Hong Zhou ◽  
Guillaume Reinhart ◽  
Bernard Billia ◽  
Q.S. Liu ◽  
...  
Keyword(s):  
Directional Solidification ◽  
Forced Convection ◽  
Columnar Microstructure ◽  
Ni Alloys

Influence of Forced Convection on Columnar Microstructure during Directional Solidification of Al - Ni Alloys

2006 ◽  
Vol 508 ◽  
pp. 181-186 ◽  
Author(s):  
Henri Nguyen-Thi ◽  
Bing Hong Zhou ◽  
Guillaume Reinhart ◽  
Bernard Billia ◽  
Q.S. Liu ◽  
...  
Keyword(s):  
Natural Convection ◽  
Directional Solidification ◽  
Forced Convection ◽  
Growth Parameters ◽  
Critical Role ◽  
Solute Concentration ◽  
Solidification Microstructure ◽  
Ni Alloys ◽  
Vibration Parameters ◽  
Solid Liquid Interface

This paper presents a summary of cellular and dendritic morphologies resulting from the upward directional solidification of Al – Ni alloys in a cylindrical crucible. We analysed the coupling of solid-liquid interface morphology with natural and forced convection. The influence of natural convection was first analyzed as a function of growth parameters (solute concentration, growth rate and thermal gradient). In a second step, the influence of axial vibrations on solidification microstructure was investigated by varying vibration parameters (amplitude and frequency). Experimental results were compared to preliminary numerical simulations and a good agreement is found for natural convection. In this study, the critical role of the mushy zone in the interaction between fluid flow and solidification microstructure is pointed out.

Peritectic reaction and its influences on the microstructures evolution during directional solidification of Fe–Ni alloys

2008 ◽  
Vol 461 (1-2) ◽  
pp. 121-127 ◽  
Author(s):  
L.S. Luo ◽  
Y.Q. Su ◽  
J.J. Guo ◽  
X.Z. Li ◽  
S.M. Li ◽  
...  
Keyword(s):  
Directional Solidification ◽  
Peritectic Reaction ◽  
Ni Alloys

scholarly journals In Situ and Real Time Investigation of Directional Solidification of Al - Ni Alloys by Synchrotron Imaging

2006 ◽  
pp. 75-80
Author(s):  
Guillaume Reinhart ◽  
Henri Nguyen-Thi ◽  
J. Gastaldi ◽  
Bernard Billia ◽  
Nathalie Mangelinck-Noël ◽  
...  
Keyword(s):  
Directional Solidification ◽  
Real Time ◽  
Ni Alloys ◽  
Synchrotron Imaging

Effect of Travelling Magnetic Field on the Directional Solidification of Refined Al-3.5 wt%Ni Alloys

2006 ◽  
pp. 221-226
Author(s):  
K. Zaïdat ◽  
T. Ouled-Khachroum ◽  
Nathalie Mangelinck-Noël ◽  
Guillaume Reinhart ◽  
M.D. Dupouy ◽  
...  
Keyword(s):  
Magnetic Field ◽  
Directional Solidification ◽  
Ni Alloys

Recent Activities on Directional Solidification at the State Key Laboratory of Solidification Processing

2007 ◽  
Vol 539-543 ◽  
pp. 3106-3111 ◽  
Author(s):  
Lin Liu ◽  
Fa Qin Xie ◽  
Jun Zhang ◽  
Heng Zhi Fu
Keyword(s):  
Directional Solidification ◽  
State Of The Art ◽  
Morphological Evolution ◽  
Research Work ◽  
Advanced Materials ◽  
Solidification Processing ◽  
Ni Alloys ◽  
High Thermal Gradient ◽  
Deep Supercooling ◽  
Specific Orientation

Directional solidification technique permits materials to grow along specific orientation, in order to obtain mechanical and/or physical anisotropy. The present research attempts to introduce the research work in the field of processing of some advanced materials by innovative directional solidification techniques performed at State Key Laboratory of Solidification Processing and with author’s intended research work. The paper deals with the specific topics on state of the art of directional solidification: single crystal superalloy and Nd-Fe-B alloys under high thermal gradient, Cu-Ni alloys under deep supercooling of the melt. The relevant solidification phenomena, such as morphological evolution, crystal growth for multi-phases in the processing of directional solidification, are discussed briefly. The trends of developments of directional solidification techniques are also prospected.

Correlation between dendrite arm spacing and microhardness during unsteady-state directional solidification of Al–Ni alloys

2011 ◽  
Vol 91 (5) ◽  
pp. 337-343 ◽  
Author(s):  
Bismarck L. Silva ◽  
Igor J.C. Araujo ◽  
Wanderson S. Silva ◽  
Pedro R. Goulart ◽  
Amauri Garcia ◽  
...  
Keyword(s):  
Directional Solidification ◽  
Unsteady State ◽  
Ni Alloys ◽  
Dendrite Arm Spacing

Directional solidification of Al–1.5wt% Ni alloys under diffusion transport in space and fluid-flow localisation on earth

2005 ◽  
Vol 281 (2-4) ◽  
pp. 654-668 ◽  
Author(s):  
H. Nguyen Thi ◽  
Y. Dabo ◽  
B. Drevet ◽  
M.D. Dupouy ◽  
D. Camel ◽  
...  
Keyword(s):  
Fluid Flow ◽  
Directional Solidification ◽  
Diffusion Transport ◽  
Ni Alloys
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