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In this work, laser surface re-melting of Zr-8wt% Cu alloy was carried out at different scan speeds to understand the microstructural evolution in these Zr-Cu alloys. The alloying of Zr with Cu was considered to enhance the cooling rate of the alloy during laser re-melting in order to increase the Cu super-saturation in Zr. In this study, it has been shown that laser re-melting, which creates a very high cooling rate of 107 K/s, can lead to solute super-saturation of Zr. In addition to this, the study has also shown that while beyond a critical scan speed, the solute super-saturation dictates the mechanical property of the laser re-melted region, below the critical cooling rate influence of microstructure on the mechanical property is dominant.

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Influence of Laser Power and Scan Speed on Microstructure of Laser Melted Alloy of Zr-Cu

  • 会议论文

  • 发表日期：

    2025年

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  • Vishal Singh,
  • B. Vishwanadh,
  • N. Naveen Kumar,
  • Satish C. Mishra,
  • C. P. Paul,
  • R. Tewari

摘要

In this work, laser surface re-melting of Zr-8wt% Cu alloy was carried out at different scan speeds to understand the microstructural evolution in these Zr-Cu alloys. The alloying of Zr with Cu was considered to enhance the cooling rate of the alloy during laser re-melting in order to increase the Cu super-saturation in Zr. In this study, it has been shown that laser re-melting, which creates a very high cooling rate of 107 K/s, can lead to solute super-saturation of Zr. In addition to this, the study has also shown that while beyond a critical scan speed, the solute super-saturation dictates the mechanical property of the laser re-melted region, below the critical cooling rate influence of microstructure on the mechanical property is dominant.