Control of Microstructure by Laser Spot Heating

Abstract:

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The present study tried to control grain structure in polycrystalline aluminum or titanium by means of a laser spot heating method as well as by a computer simulation technique. Monte Carlo simulation of spot heating was performed utilizing two-dimensional grain structure model composed of 200 x 200 sites with hexagonal cells. Grain growth proceeded preferentially in the higher temperature region and resulted in a large grain surrounded by small grains. This large grain tended to keep on growing during homogeneous heating after the spot heating, suggesting that the spot heating technique can fabricate a peculiar grain structure such as different grain size distribution and texture that are not realized by utilizing conventional uniform heating process. Laser spot heating utilizing a fiber-laser system realized heating of small area such as 30micorn diameter to bring about peculiar grain size distribution as calculated by the computer simulation.

Info:

Periodical:

Solid State Phenomena (Volume 127)

Edited by:

Masaaki Naka

Pages:

337-342

DOI:

10.4028/www.scientific.net/SSP.127.337

Citation:

T. Shibayanagi et al., "Control of Microstructure by Laser Spot Heating ", Solid State Phenomena, Vol. 127, pp. 337-342, 2007

Online since:

September 2007

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Price:

$35.00

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