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<p>The composite materials of austenitic stainless steel and nickel-based alloys expand the application range of single materials, exhibiting excellent properties such as high strength and toughness, enabling them to withstand heavy loads and impacts while maintaining good heat resistance, making them suitable for high-temperature applications. This study employs TIG cold welding additive manufacturing to fabricate austenitic stainless steel/nickel-based alloy specimens. The specimens are subjected to metallographic analysis, x-ray diffraction, scanning electron microscopy, energy-dispersive spectroscopy, microhardness testing, and shear punch testing. The results indicate that the γ phase forms on both sides of the fusion interface. Slight macrosegregation is observed at the interface between the nickel-based alloy and austenitic stainless steel, with a small amount of liquation cracks appearing on the nickel-based alloy side. The fusion interface between the nickel-based alloy and the nickel-based alloy interlayer shows good bonding, uniform elemental diffusion, and the precipitation of Laves phase. The additively manufactured nickel-based alloy specimens exhibit high microhardness (290 ± 15 HV) and shear strength (635.2&#xa0;MPa). This study successfully applies TIG cold welding additive manufacturing to produce composite specimens of austenitic stainless steel and nickel-based alloys, demonstrating favorable microstructural characteristics and excellent mechanical properties.</p>

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Investigation on the Microstructure and Mechanical Properties of the Electric Arc Additive Manufacturing Austenite Stainless Steel/Ni-Based Alloy

  • 期刊论文

  • 发表日期：

    2025年5月8日

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  • Ming Zhao,
  • Xilong Zhao,
  • Pengfei Wang

摘要

The composite materials of austenitic stainless steel and nickel-based alloys expand the application range of single materials, exhibiting excellent properties such as high strength and toughness, enabling them to withstand heavy loads and impacts while maintaining good heat resistance, making them suitable for high-temperature applications. This study employs TIG cold welding additive manufacturing to fabricate austenitic stainless steel/nickel-based alloy specimens. The specimens are subjected to metallographic analysis, x-ray diffraction, scanning electron microscopy, energy-dispersive spectroscopy, microhardness testing, and shear punch testing. The results indicate that the γ phase forms on both sides of the fusion interface. Slight macrosegregation is observed at the interface between the nickel-based alloy and austenitic stainless steel, with a small amount of liquation cracks appearing on the nickel-based alloy side. The fusion interface between the nickel-based alloy and the nickel-based alloy interlayer shows good bonding, uniform elemental diffusion, and the precipitation of Laves phase. The additively manufactured nickel-based alloy specimens exhibit high microhardness (290 ± 15 HV) and shear strength (635.2 MPa). This study successfully applies TIG cold welding additive manufacturing to produce composite specimens of austenitic stainless steel and nickel-based alloys, demonstrating favorable microstructural characteristics and excellent mechanical properties.