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Laser-processing-induced phase transformation in Zn–Al-based alloy

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Abstract

Microstructure and phase transformation of a furnace-cooled eutectoid Zn–Al-based alloy were studied after laser beam bombardment using low-angle x-ray diffraction (XRD) and backscattered scanning electron microscopy (BSEM). It was found that the microstructure of the laser-beam-treated specimen consisted mainly of the supersaturated Zn-rich β′s phase particulates of about 1−2 μm in diameter. Three structure morphologies were observed. Microcracking occurred in the laserbeam-affected zone during laser processing. Two laser-processing-induced phase transformations, i.e., decomposition of the η′FC phase and a four-phase transformation, were detected using XRD and BSEM techniques, similar to phase transformations that occurred in the same eutectoid Zn–Al-based alloy after various thermal and thermomechanical processing procedures.

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Authors and Affiliations

  1. Instituto de Investigaciones en Materiales, Universidad Nacional Autonoma de Mexico, Mexico D.F., Mexico

    Y. H. Zhu & J. A. Chavez-Carvayar

  2. Department of Manufacturing Engineering, Hong Kong Polytechnic University, Hong Kong, People’s Republic of China

    Y. H. Zhu & H. C. Man

  3. Centro de Instrumentos, Universidad Nacional Autonoma de Mexico, Mexico D.F., Mexico

    M. Villagran

Authors
  1. Y. H. Zhu
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  2. J. A. Chavez-Carvayar
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  3. H. C. Man
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  4. M. Villagran
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Zhu, Y.H., Chavez-Carvayar, J.A., Man, H.C. et al. Laser-processing-induced phase transformation in Zn–Al-based alloy. Journal of Materials Research 14, 4188–4194 (1999). https://doi.org/10.1557/JMR.1999.0567

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  • DOI: https://doi.org/10.1557/JMR.1999.0567

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