Microstructure Evolution of Ti-Al Peritectic System during the Initiated Stage of Directional Solidification

Abstract:

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The microstructure evolution of Ti-Al peretectic system in transient stage and steady state in directional solidification was predicted via theoretical analysis. The solute distribution controlled by diffusion at and ahead the solid-liquid interface will determine whether the properitectic and peritectic phases can nucleate and grow ahead of the opposing solid phase. The formation of banding structure is possible in a certain composition range. At the steady state, a microstructure selection map was set up based on interface response function model. The microstructure of TiAl alloys with different aluminum content was studied with Bridgman directional solidification method. Some evidence in the experiment has been found to support the theoretical prediction.

Info:

Periodical:

Materials Science Forum (Volumes 546-549)

Edited by:

Yafang Han et al.

Pages:

1447-1450

DOI:

10.4028/www.scientific.net/MSF.546-549.1447

Citation:

Y. Q. Su et al., "Microstructure Evolution of Ti-Al Peritectic System during the Initiated Stage of Directional Solidification", Materials Science Forum, Vols. 546-549, pp. 1447-1450, 2007

Online since:

May 2007

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Price:

$35.00

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