Fractographic Substantiation of the Loss of Resistance to Brittle Fracture of Steel after Operation in the Marine Gantry Crane Elements
作者: O. O. Nemchuk, H. V. Krechkovska
作者单位: 1G. V. Karpenko Physico-Mechanical Institute, NAS of Ukraine, 5 Naukova Str., UA-79060 Lviv, Ukraine
刊名: Metallofiz. Noveishie Tekhnol., 2019, Vol.41 (6), pp.825-836
来源数据库: G.V. Kurdyumov Institute for Metal Physics, National Academy of Science of the Ukraine
DOI: 10.15407/mfint.41.06.0825
关键词: Portal craneOperational degradation of steelResistance to brittle fractureDelaminationHydrogen influenceFractography analysis.
原始语种摘要: Portal cranes are operated for a long time in the intensive cyclic loading, which leads to the loss of the initial mechanical properties of steels, especially of their resistance to brittle fracture. The different stresses arise in different structural elements during the crane operation, and therefore it can be expected that the degradation degree of metal in these elements will also be different. The impact toughness tests using Charpy specimens (KCV), cutting from the St3sp sheet steel, after 33 years of operation in the responsible elements of the ‘Sokol’ type marine gantry crane, showed a significant decrease in the brittle fracture resistance of metal due to exposure of the higher operating stresses. The effect of steel texture on its operational degradation degree is investigated...
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关键词翻译
关键词翻译
  • degradation 减嚣夷酌
  • operation 运算
  • corresponding 对应的
  • fracture 断口
  • metal 金属
  • higher 
  • decrease 减少
  • impact 冲击碰撞
  • elements 初步
  • brittle 脆的