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There is an increasing need to lower greenhouse gas (HGH) effects to reduce pollution. One proposed solution is to blend hydrogenHydrogen into our natural gas pipelines. However, hydrogenHydrogen is known to degrade the mechanical propertiesMechanical properties of many alloys through hydrogen embrittlementHydrogen embrittlement (HE). Furthermore, the effect of additive manufacturingAdditive manufacturing (AM) processing on material properties and resistance to HE has not been thoroughly investigated. In this study, AM 316L316L stainless steelStainless steel tensile bars and solubility specimens were soaked in 100% hydrogenHydrogen gas and 50% hydrogenHydrogen-natural gas blend at 10 MPa for 5 weeks. The samples were then allowed to rest and let reversible hydrogenHydrogen degassing occur over 72 h, before being mechanically and chemically evaluated. The microstructureMicrostructure of the samples was then examined for changes from uncharged samples by several different characterizationCharacterization methods and compared to stock 316L316L.

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Effect of Hydrogen-Blended Natural Gas on Additive Manufactured 316L Stainless Steel in Pressure Regulator Environments

  • 会议论文

  • 发表日期：

    2025年

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  • Gerardo Gamboa,
  • Ali Babakr,
  • Marcus Young

摘要

There is an increasing need to lower greenhouse gas (HGH) effects to reduce pollution. One proposed solution is to blend hydrogenHydrogen into our natural gas pipelines. However, hydrogenHydrogen is known to degrade the mechanical propertiesMechanical properties of many alloys through hydrogen embrittlementHydrogen embrittlement (HE). Furthermore, the effect of additive manufacturingAdditive manufacturing (AM) processing on material properties and resistance to HE has not been thoroughly investigated. In this study, AM 316L316L stainless steelStainless steel tensile bars and solubility specimens were soaked in 100% hydrogenHydrogen gas and 50% hydrogenHydrogen-natural gas blend at 10 MPa for 5 weeks. The samples were then allowed to rest and let reversible hydrogenHydrogen degassing occur over 72 h, before being mechanically and chemically evaluated. The microstructureMicrostructure of the samples was then examined for changes from uncharged samples by several different characterizationCharacterization methods and compared to stock 316L316L.