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<p>Understanding the impact of temperature on ultrasonic velocity in solids is crucial for accurately assessing residual stresses (RS). We studied changes in longitudinal and transverse ultrasonic velocities in steel and aluminum samples across a temperature range from 10 to 50 °C that is realistically encountered in laboratory and field conditions, using the methodology and equipment, UltraMARS™ that were developed for non-destructive stress measurement using ultrasonic waves and that was used successfully in measuring RS in welded structures. From the conducted experiments and available information in the literature, it can be suggested that the difference in propagation velocities of shear waves in mutually perpendicular polarization that determines the sign and the value of formed residual stresses practically does not change with changes in the studied temperature interval. The changes in the stress values with temperature, therefore, are sensitive, mostly, to the changes in the longitudinal velocity. A methodology was developed for correcting the measurement of residual stresses at different temperatures by taking into account the changes in the value of the acoustic-elastic coefficient in a stress-free region of the investigated sample at a given temperature.</p>

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Accounting for temperature influence in non-destructive measurements of applied and residual stresses by ultrasonic method

  • 期刊论文

  • 发表日期：

    2025年8月18日

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  • Jacob Kleiman,
  • Volodimir Smilenko,
  • Vladimir Kot

摘要

Understanding the impact of temperature on ultrasonic velocity in solids is crucial for accurately assessing residual stresses (RS). We studied changes in longitudinal and transverse ultrasonic velocities in steel and aluminum samples across a temperature range from 10 to 50 °C that is realistically encountered in laboratory and field conditions, using the methodology and equipment, UltraMARS™ that were developed for non-destructive stress measurement using ultrasonic waves and that was used successfully in measuring RS in welded structures. From the conducted experiments and available information in the literature, it can be suggested that the difference in propagation velocities of shear waves in mutually perpendicular polarization that determines the sign and the value of formed residual stresses practically does not change with changes in the studied temperature interval. The changes in the stress values with temperature, therefore, are sensitive, mostly, to the changes in the longitudinal velocity. A methodology was developed for correcting the measurement of residual stresses at different temperatures by taking into account the changes in the value of the acoustic-elastic coefficient in a stress-free region of the investigated sample at a given temperature.