Microstructure Evolution of a Zn-4wt.% Cu Hyperperitectic Alloy under Laser Surface Remelting

Wei Dong Huang; Yun Peng Su; Meng Wang; Xin Lin

doi:10.4028/www.scientific.net/MSF.475-479.2611

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HomeMaterials Science ForumMaterials Science Forum Vols. 475-479Microstructure Evolution of a Zn-4wt.% Cu...

Microstructure Evolution of a Zn-4wt.% Cu Hyperperitectic Alloy under Laser Surface Remelting

Abstract:

Laser surface remelting experiments on Zn-4.0wt.%Cu hyperperitectic alloy have been performed on a 5kW CW CO2 laser with the scanning velocities between 6 and 1207mm/s. Microstructures in both longitudinal and transverse section of the molten pools have been analyzed by optical microscope and SEM technique, and the average composition in the molten pools has been measured by Electron Probe Microanalysis(EPMA). With the increasing of growth rate, the microstructures of Zn-4.0 wt.%Cu alloy change from planar interface to lamellar structures and then cellular structures, and finally to absolute stability planar interface at a growth rate of 562mm/s, which shows reasonable agreement with that predicted by M-S theory.

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Materials Science Forum (Volumes 475-479)

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2611-2614

DOI:

https://doi.org/10.4028/www.scientific.net/MSF.475-479.2611

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Online since:

January 2005

Authors:

Wei Dong Huang, Yun Peng Su, Meng Wang, Xin Lin

Keywords:

Absolute Stability, Laser Surface Remelting, Micro-Structure Evolution, Zn4.0wt.%Cu Hyperperitectic Alloy

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