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Abstract <p>The method is outlined to determine the creep parameters of structural steels at high temperatures using the instrumented indentation testing. The existing methods of high-temperature long-term indentation testing are reviewed from the standpoint of the accuracy of assessing the mechanical properties. The main challenges and bottlenecks in implementing this approach are explained. The results are given on the long-term high-temperature indentation testing steel grades, on plotting the creep diagram in the strain—time coordinates during loading at temperatures up to 700°C. For structural steel 15Kh2NMFAA, widely used in the power engineering to manufacture equipment operating at high temperatures, the relationships are obtained linking the creep rate with the temperature at a constant initial stress. Also, the functions of the creep rate against the initial stress are derived for a constant test temperature.</p>

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Estimating Mechanical Parameters of Structural Materials at High Temperatures Using Instrumented Indentation Testing

  • 期刊论文

  • 发表日期：

    2026年8月4日

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  • G. B. Sviridov,
  • A. A. Pankina,
  • A. Yu. Marchenkov

摘要

Abstract

The method is outlined to determine the creep parameters of structural steels at high temperatures using the instrumented indentation testing. The existing methods of high-temperature long-term indentation testing are reviewed from the standpoint of the accuracy of assessing the mechanical properties. The main challenges and bottlenecks in implementing this approach are explained. The results are given on the long-term high-temperature indentation testing steel grades, on plotting the creep diagram in the strain—time coordinates during loading at temperatures up to 700°C. For structural steel 15Kh2NMFAA, widely used in the power engineering to manufacture equipment operating at high temperatures, the relationships are obtained linking the creep rate with the temperature at a constant initial stress. Also, the functions of the creep rate against the initial stress are derived for a constant test temperature.