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<p>Under the service conditions of the second-generation solar energy storage equipment, this paper studied the isothermal (565&#xa0;°C) creep behavior and strengthening mechanism of a new type of nitrogen-containing nickel-based deposited metal under the stress range of 350 Mpa-500 Mpa. It was found that the precipitated phases of Ni-based deposited metals containing nitrogen were composed of γ′, Laves, γ and M (C, N) carbonitrides at 565&#xa0;°C. The precipitated phase of Inconel 625 deposited metal was composed of γ′, Laves, γ and MC carbides. Under the same stress, the content of γ′ phase in nitrogen-containing nickel-based deposited metal was higher than that of Inconel 625. The increase in N content in nitrogen-containing nickel-based deposited metal promoted the formation of γ′ phase. The lattice distortion caused by N atoms and nitrides played a pinning role on dislocations, which hindered dislocation movement and improved the creep properties of the alloy. There were dislocations, stacking faults and continuous stacking faults in the deformation process of nitrogen-containing nickel-based deposited metal specimens, and the fracture mechanism was a mixed fracture dominated by transgranular fracture. The transgranular fracture was caused by the destruction of the intracrystalline structure caused by the accumulation of micropores. The local interaction inside the alloy promoted the generation and propagation of cracks.</p>

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Study on Creep Behavior of Nitrogen-Containing Nickel-based Deposited Metal at 565 °C

  • 期刊论文

  • 发表日期：

    2026年2月9日

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  • Hongyu Liu,
  • Haoxing Li,
  • Xiaoyue Li,
  • Fanyong Kong,
  • Yunhai Su

摘要

Under the service conditions of the second-generation solar energy storage equipment, this paper studied the isothermal (565 °C) creep behavior and strengthening mechanism of a new type of nitrogen-containing nickel-based deposited metal under the stress range of 350 Mpa-500 Mpa. It was found that the precipitated phases of Ni-based deposited metals containing nitrogen were composed of γ′, Laves, γ and M (C, N) carbonitrides at 565 °C. The precipitated phase of Inconel 625 deposited metal was composed of γ′, Laves, γ and MC carbides. Under the same stress, the content of γ′ phase in nitrogen-containing nickel-based deposited metal was higher than that of Inconel 625. The increase in N content in nitrogen-containing nickel-based deposited metal promoted the formation of γ′ phase. The lattice distortion caused by N atoms and nitrides played a pinning role on dislocations, which hindered dislocation movement and improved the creep properties of the alloy. There were dislocations, stacking faults and continuous stacking faults in the deformation process of nitrogen-containing nickel-based deposited metal specimens, and the fracture mechanism was a mixed fracture dominated by transgranular fracture. The transgranular fracture was caused by the destruction of the intracrystalline structure caused by the accumulation of micropores. The local interaction inside the alloy promoted the generation and propagation of cracks.