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A platform for research: civil engineering, architecture and urbanism
Fire-resistant steels
Addressing the lack of potential method to evaluate the fire-resistance properties of microalloyed steels, a test was developed in which a sample was subjected to a constant load while the temperature was increased until failure. Steels studied include Alloy 1 (carbon-manganese), Alloy 2 (niobium, molybdenum, and/or vanadium), and 1.0 wt% copper-alloyed steel. The constant-load test was carried out in the same laboratory tension-testing apparatus as the isothermal test, except that the specimen was held inside a resistance-heated "clamshell" furnace. First, a constant load was applied to the sample at room temperature, resulting in a strain in the elastic region. Then, while maintaining the constant load, temperature was increased at a predetermined rate until sample deformation or failure. Constant-load tests were conducted at specific stresses, 50% of the yield strength, and at several linear heating rates of 300 degree C/hr, 600 degree C/hr, and 1200 degree C/hr. Among the steels studied, the 1.0% copper steel exhibited the longest life at all the imposed heating rates.
Fire-resistant steels
Addressing the lack of potential method to evaluate the fire-resistance properties of microalloyed steels, a test was developed in which a sample was subjected to a constant load while the temperature was increased until failure. Steels studied include Alloy 1 (carbon-manganese), Alloy 2 (niobium, molybdenum, and/or vanadium), and 1.0 wt% copper-alloyed steel. The constant-load test was carried out in the same laboratory tension-testing apparatus as the isothermal test, except that the specimen was held inside a resistance-heated "clamshell" furnace. First, a constant load was applied to the sample at room temperature, resulting in a strain in the elastic region. Then, while maintaining the constant load, temperature was increased at a predetermined rate until sample deformation or failure. Constant-load tests were conducted at specific stresses, 50% of the yield strength, and at several linear heating rates of 300 degree C/hr, 600 degree C/hr, and 1200 degree C/hr. Among the steels studied, the 1.0% copper steel exhibited the longest life at all the imposed heating rates.
Fire-resistant steels
Walp, M.S. (author) / Speer, J.G. (author) / Matlock, David K. (author)
Advanced Materials & Processes ; 162 ; 34-36
2004
3 Seiten
Article (Journal)
English
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