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<p>This research investigates the potential of Laser Powder Bed Fusion to fabricate high-performance bimetallic components by analyzing the mechanical properties and microstructure of stainless steel 316L and maraging steel 1.2709 composites. Comprehensive characterization revealed a significant hardness enhancement at the fusion zone (361 ± 14&#xa0;HV) compared to the base materials (stainless steel 316L: 223 ± 11&#xa0;HV; maraging steel 1.2709: 324 ± 16&#xa0;HV). X-ray Diffraction analysis confirmed the distinct phase structures of the two steels. The bimetallic sample exhibited superior tensile properties, including a yield strength of 810&#xa0;MPa, an ultimate tensile strength of 1234&#xa0;MPa, and an elongation of 20%, outperforming the monolithic counterparts. These results prove the ability of Laser Powder Bed Fusion to fabricate bimetallic structures with enhanced mechanical performance, thereby offering clear advantages for applications that can benefit from good strength, toughness, and complex geometries. This way, the work furthers additive manufacturing capabilities toward engineered materials with specific properties.</p>

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Mechanical Properties and Microstructure Characterization of Stainless Steel 316l and Maraging Steel 1.2709 Bimetallic Structures Fabricated by Laser Powder Bed Fusion

  • 期刊论文

  • 发表日期：

    2025年5月28日

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  • S. Ravi,
  • V. Satheeshkumar,
  • M. Kumaran

摘要

This research investigates the potential of Laser Powder Bed Fusion to fabricate high-performance bimetallic components by analyzing the mechanical properties and microstructure of stainless steel 316L and maraging steel 1.2709 composites. Comprehensive characterization revealed a significant hardness enhancement at the fusion zone (361 ± 14 HV) compared to the base materials (stainless steel 316L: 223 ± 11 HV; maraging steel 1.2709: 324 ± 16 HV). X-ray Diffraction analysis confirmed the distinct phase structures of the two steels. The bimetallic sample exhibited superior tensile properties, including a yield strength of 810 MPa, an ultimate tensile strength of 1234 MPa, and an elongation of 20%, outperforming the monolithic counterparts. These results prove the ability of Laser Powder Bed Fusion to fabricate bimetallic structures with enhanced mechanical performance, thereby offering clear advantages for applications that can benefit from good strength, toughness, and complex geometries. This way, the work furthers additive manufacturing capabilities toward engineered materials with specific properties.