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Journal of Materials Science

, Volume 42, Issue 13, pp 4763–4771 | Cite as

Microstructure evolution of laser surface remelted Zn-2.7 wt.%Cu hyperperitectic alloy

  • Yunpeng SuEmail author
  • Xin Lin
  • Sen Yang
  • Meng Wang
  • Weidong Huang
Article

Abstract

Laser surface remelting experiments on Zn-2.7 wt.%Cu hyperperitectic alloy were performed by using a 5kW CW CO2 laser at beam scanning velocities ranging between 6 and 1,207 mm/s. With the increase of the growth rate, the microstructures of Zn-2.7 wt.% Cu alloy changed from planar interface to lamellar structures, cellular structures, and finally to high velocity absolute stability (HVAS) planar interface at a growth rate of 349 mm/s. The critical growth rate for the transformation from lamellar structure to cells was about 96 mm/s. Quantitative measurement was preformed to reveal the relationship between the average lamellar spacing and the corresponding growth rate, and the results are in excellent agreement with the prediction of the TMK eutectic model.

Keywords

Lamellar Structure Critical Velocity Molten Pool Planar Interface Lamellar Spacing 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.

Notes

Acknowledgements

This work is financially supported by the National Natural Science Foundation of China Grant No. 50201012, 50471065. The authors would like to thank Miss Qian Chen and Miss Xiaoqin Yu of Lan Zhou University of Technology for her enthusiastic help.

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Copyright information

© Springer Science+Business Media, LLC 2007

Authors and Affiliations

  • Yunpeng Su
    • 1
    • 3
    Email author
  • Xin Lin
    • 1
  • Sen Yang
    • 2
  • Meng Wang
    • 1
  • Weidong Huang
    • 1
  1. 1.State Key Laboratory of Solidification ProcessingNorthwestern Polytechnical UniversityXi’anP.R. China
  2. 2.Department of Materials Science and EngineeringInner Mongolia University of TechnologyHohhotP.R. China
  3. 3.Department of Industrial and Systems EngineeringThe Hong Kong Polytechnic UniversityHung Hom, KowloonHong Kong

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