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<p>The silicon-steel sheet was partially non-magnetized by directed energy deposition (DED) of NiCr powder to improve motor efficiency. Significant bending of the silicon-steel sheet was observed after the deposition, which leads to assembly problems. A finite element (FE) model was utilized to develop a new geometric design to suppress thermal bending of the silicon-steel sheet. Consequently, holes were strategically placed in the region of compressive residual stress, which led to a reduction in the bending of the sheet. In addition, preheating the silicon-steel sheet before laser deposition can control the resulting deformation. The proposed design modifications can be adopted as design guidelines to mitigate out-of-plane deformation in thin sheets subjected to thermal loading.</p>

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Suppression of thermal bending in laser deposited partially non-magnetized silicon-steel sheet by finite element analysis

  • 期刊论文

  • 出版模式：

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  • 发表日期：

    2026年2月17日

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  • Karthik Palaniappan,
  • Nobufumi Ueshima,
  • Norihiko Hamada,
  • Katsunari Oikawa

摘要

The silicon-steel sheet was partially non-magnetized by directed energy deposition (DED) of NiCr powder to improve motor efficiency. Significant bending of the silicon-steel sheet was observed after the deposition, which leads to assembly problems. A finite element (FE) model was utilized to develop a new geometric design to suppress thermal bending of the silicon-steel sheet. Consequently, holes were strategically placed in the region of compressive residual stress, which led to a reduction in the bending of the sheet. In addition, preheating the silicon-steel sheet before laser deposition can control the resulting deformation. The proposed design modifications can be adopted as design guidelines to mitigate out-of-plane deformation in thin sheets subjected to thermal loading.