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Abstract <p>Laser repairing has emerged as an appealing alternative to traditional techniques for repairing cracks in nuclear reactor piping. In this paper, laser repairing of pipe specimens have been attempted with varying postulated crack depths. Various repairing parameters were selected to repair prefabricated grooves and repairing effectiveness was evaluated through metallographic observations and indentation tests. Big differences in microstructures and hardness profiles were observed in repair zones with different crack depths. Furthermore, laser-beam power and nozzle moving speed showed obvious impact on the repair quality for a given crack depth.</p>

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Laser-deposition Crack Repairing in a Stainless-Steel Tube and Repairing Effectiveness Study

  • 期刊论文

  • 发表日期：

    2025年2月1日

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  • Ding Zhou,
  • Yugang Li,
  • Lei Wang,
  • Jiacheng Luo,
  • Hongwei Qiao,
  • Lei Sun

摘要

Abstract

Laser repairing has emerged as an appealing alternative to traditional techniques for repairing cracks in nuclear reactor piping. In this paper, laser repairing of pipe specimens have been attempted with varying postulated crack depths. Various repairing parameters were selected to repair prefabricated grooves and repairing effectiveness was evaluated through metallographic observations and indentation tests. Big differences in microstructures and hardness profiles were observed in repair zones with different crack depths. Furthermore, laser-beam power and nozzle moving speed showed obvious impact on the repair quality for a given crack depth.