Scholarlink

<p>Laser cladding (LC) is a promising surface-modification method that can be used to manufacture coating layers with unique physical and chemical properties on substrates. In this study, the single-track and multitrack overlapping cladding experiments were conducted using Ni60 powder on an H13 substrate. The morphology of cracks in single-track and multitrack clads was analyzed, and their related dynamic evolution mechanisms were discussed in depth. Furthermore, a finite element model that could be used to predict the initiation and propagation behavior of cracks was developed to explore the stress field during the cladding process. Different types of cracks were observed under different laser powers, and the experimental and simulation results simultaneously demonstrated the dynamic evolution mechanisms of the net-shaped and transverse cracks. Longitudinal cracks mainly lie in the overlapping zone of multitrack clads, and the key factor for their evolution behavior is the stress concentration caused by pore defects. This study provides a valuable understanding of the crack morphology, thermal cycles, and stress evolution in multitrack claddings of Ni60 materials from both theoretical and experimental perspectives.</p>

错误：搜索内容不能为空，请输入英文关键词
错误：关键词超出字数限制，请精简
高级检索

Investigation of crack evolution in laser-cladded single-track and multi-track coatings based on thermomechanical coupling simulation

  • 期刊论文

  • 发表日期：

    2026年7月6日

查看全文
  • Yan-Hua Bian,
  • Shao-Xia Li,
  • Chong-Xin Tian,
  • Li-Wei Wang,
  • Wen-Shuai Xu,
  • Peng Li,
  • Xiu-Li He,
  • Gang Yu

摘要

Laser cladding (LC) is a promising surface-modification method that can be used to manufacture coating layers with unique physical and chemical properties on substrates. In this study, the single-track and multitrack overlapping cladding experiments were conducted using Ni60 powder on an H13 substrate. The morphology of cracks in single-track and multitrack clads was analyzed, and their related dynamic evolution mechanisms were discussed in depth. Furthermore, a finite element model that could be used to predict the initiation and propagation behavior of cracks was developed to explore the stress field during the cladding process. Different types of cracks were observed under different laser powers, and the experimental and simulation results simultaneously demonstrated the dynamic evolution mechanisms of the net-shaped and transverse cracks. Longitudinal cracks mainly lie in the overlapping zone of multitrack clads, and the key factor for their evolution behavior is the stress concentration caused by pore defects. This study provides a valuable understanding of the crack morphology, thermal cycles, and stress evolution in multitrack claddings of Ni60 materials from both theoretical and experimental perspectives.