Tests on mechanical properties of double-sided stainless-clad (SC) bimetallic steel after elevated temperature exposure are presented in this paper. Twenty-six tensile coupon tests were carried out on the double-sided SC bimetallic steel specimens, with 316L stainless steel as the cladding layers and Q345 carbon steel as the substrate metal. The specimens were heated to various elevated temperatures up to 1000 ℃ and then cooled down to ambient temperature in air or water, to assess the influence of cooling approaches. In addition, the impact of in-fire stresses, which represents the load ratios of structural members throughout fire hazards, was also examined. Stress-strain responses and characteristic mechanical properties were acquired and presented. The measured reduction factors after fire exposure were compared with existing prediction rules for carbon steel and stainless steel, as well as single-sided SC bimetallic steel to assess their feasibility to the studied double-sided SC bimetallic material. To provide a reference for evaluation of the mechanical properties of double-sided SC bimetallic steel members in post-fire conditions, new predictive rules for reduction factors of the double-sided SC bimetallic steel after fire exposure were advanced.

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Tests on Mechanical Properties of Double-Sided Stainless-Clad Bimetallic Steel After Fire Exposure

  • Xin-Yu Zhang,
  • Chen-Yu Xu,
  • Hai-Ting Li

摘要

Tests on mechanical properties of double-sided stainless-clad (SC) bimetallic steel after elevated temperature exposure are presented in this paper. Twenty-six tensile coupon tests were carried out on the double-sided SC bimetallic steel specimens, with 316L stainless steel as the cladding layers and Q345 carbon steel as the substrate metal. The specimens were heated to various elevated temperatures up to 1000 ℃ and then cooled down to ambient temperature in air or water, to assess the influence of cooling approaches. In addition, the impact of in-fire stresses, which represents the load ratios of structural members throughout fire hazards, was also examined. Stress-strain responses and characteristic mechanical properties were acquired and presented. The measured reduction factors after fire exposure were compared with existing prediction rules for carbon steel and stainless steel, as well as single-sided SC bimetallic steel to assess their feasibility to the studied double-sided SC bimetallic material. To provide a reference for evaluation of the mechanical properties of double-sided SC bimetallic steel members in post-fire conditions, new predictive rules for reduction factors of the double-sided SC bimetallic steel after fire exposure were advanced.