Scholarlink

<p>The extensive application of fiber laser welding for dissimilar materials is prevalent within aerospace and defense technology. This study focuses on the fiber laser welding of Co-based superalloy L605 and SS321. Response surface methodology (RSM) technique was employed to optimize the laser parameters. The welding experiments were conducted under three distinct conditions: high, medium, and low heat input. Moreover, the change in microstructure and mechanical properties of the welded samples was also investigated. Furthermore, simulations of the weld bead were conducted. It is observed that the geometry of the weld bead is noticeably affected by the level of heat applied during the welding process. The EDS and XRD confirmed the presence of hard intermetallic phases of cobalt and tungsten in the weld zone which increase the weld strength. The microhardness of the weld zone is found to be 200 ± 12 HV<sub>0.1</sub> exceeded that of SS321 (170HV<sub>0.1</sub>) and less than that of L605 (310HV<sub>0.1</sub>). The maximum tensile strength observed in dissimilar welds reached 679 ± 15&#xa0;MPa, and fractography results indicated ductile failure in the weld joints.</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

Parametric Study and Weldability Characteristics of Dissimilar Metals Cobalt Superalloy L605 and SS321 Using Fiber Laser

  • 期刊论文

  • 发表日期：

    2025年1月24日

查看全文
  • B. Hari Prasad,
  • Mukul Anand,
  • Shakti Kumar,
  • A. K. Das,
  • P. Mastaniah,
  • G. M. Reddy

摘要

The extensive application of fiber laser welding for dissimilar materials is prevalent within aerospace and defense technology. This study focuses on the fiber laser welding of Co-based superalloy L605 and SS321. Response surface methodology (RSM) technique was employed to optimize the laser parameters. The welding experiments were conducted under three distinct conditions: high, medium, and low heat input. Moreover, the change in microstructure and mechanical properties of the welded samples was also investigated. Furthermore, simulations of the weld bead were conducted. It is observed that the geometry of the weld bead is noticeably affected by the level of heat applied during the welding process. The EDS and XRD confirmed the presence of hard intermetallic phases of cobalt and tungsten in the weld zone which increase the weld strength. The microhardness of the weld zone is found to be 200 ± 12 HV0.1 exceeded that of SS321 (170HV0.1) and less than that of L605 (310HV0.1). The maximum tensile strength observed in dissimilar welds reached 679 ± 15 MPa, and fractography results indicated ductile failure in the weld joints.