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Experimental Investigation of Mechanical Properties of TSZ410 Ferritic Stainless Steel at Elevated Temperature
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1.College of Civil Engineering， Tongji University， Shanghai 200092， China;2.State Key Laboratory of Disaster Reduction in Civil Engineering， Tongji University， Shanghai 200092， China;3.Broad Group， Changsha 410138， China;4.School of Mechanics and Civil Engineering， China University of Mining and Technology， Xuzhou 221116， China

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TU511.3

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    Abstract:

    By conducting a high-temperature steady-state test study on TSZ410 ferritic stainless steel， the main mechanical performance indicators such as elastic modulus， nominal yield strength， tensile strength， and elongation were obtained. The Rasmussen model and Gardner model were compared and analyzed. Based on the Rasmussen model， the calculation formula for the high-temperature stainless steel material hardening index was proposed and the high temperature stress-strain constitutive relationship of TSZ410 stainless steel was established. Compared with Q235B， S30408 austenitic stainless steel and EN 1.4003 stainless steel， the law of the effect of temperature on its mechanical properties was revealed. The results indicate that the initial elastic modulus， the nominal yield strength， and the tensile strength of TSZ410 stainless steel decrease gradually with the increase of temperature， especially in the temperature segment of 400℃ to 700℃， and the rate of decline is most significant. When heating temperatures are equal to 700°C， the elastic modulus is reduced to 40% of the normal temperature elastic modulus， and the nominal yield strength and tensile strength are reduced to about 15% of the nominal yield strength and tensile strength at room temperature. At a high temperature， the strength loss of TSZ410 stainless steel is larger than that of Q235B， while the stiffness loss is obviously less than that of Q235B. At a temperature below 500 ℃， TSZ410 stainless steel strength loss is significantly less than S30408 austenitic stainless steel， but when the temperature is higher than 500 ℃， the opposite is true.

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    Fig.1 High temperature electronic material testing machine
    Fig.2 Specimen size (unit：mm)
    Fig.3 Stress-strain curve of TSZ410 stainless steel at room temperature
    Fig.4 Test pieces of TSZ410 stainless steel after elevated temperature tensile test
    Fig.5 Comparison of mechanical parameter test results and mathematical model of TSZ410 stainless steel
    Fig.6 Stress-strain curve of TSZ410 stainless steel at elevated temperature
    Fig.7 Stress-strain fitting curve of TSZ410 stainless steel at elevated temperature
    Fig.8 Comparison of mechanical properties of different steels at elevated temperature
    Table 3
    Table 1
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LOU Guobiao, TAO Yuchao, CHEN Wulong, TAN Yongqiang, WANG Meinan, JIANG Jian. Experimental Investigation of Mechanical Properties of TSZ410 Ferritic Stainless Steel at Elevated Temperature[J].同济大学学报(自然科学版),2021,49(1):20~29

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  • Received:May 29,2020
  • Online: February 26,2021
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