Exploring the Correlation between Thermal Diffusivity and Ultimate Tensile Strength in Usibor^® 1500 through Laser Thermography

Abstract

This paper presents a non-destructive laser thermography (LT) procedure for estimating Usibor® 1500 ultimate tensile strength (UTS) based on thermal diffusivity measurements. The key innovation lies in the revealed inverse relationship between thermal diffusivity (α) and UTS, highlighting its potential for estimating mechanical properties in a non-destructive way. The experimental phase involved analyzing fifteen specimens using a 960 nm CW laser source and a thermal camera to measure thermal diffusivity. The results demonstrate a clear correlation between α and UTS, providing valuable material characterization insights and demonstrating promising applications in mechanical design.

Keywords

• thermal diffusivity
• laser thermography
• Usibor^®1500
• ultimate tensile strength
• hardness
• hardening