High-Temperature Scanning Indentation: A new method to investigate in situ metallurgical evolution along temperature ramps

A new technique, High-Temperature Scanning Indentation (HTSI), is proposed to investigate metallurgical evolution occurring during anisothermal heat treatments. This technique based on the use of high-speed nanohardness measurements carried out linear thermal ramping system with appropriate settings. specific loading procedure, a quarter sinus function, creep segment and three-step unloading method, permits measurement elastic, plastic properties. The indentation cycle lasts one second minimize drift issues. approach enables quasi-continuous elastic modulus hardness as function temperature in much shorter times than previous techniques. HTSI validated fused silica pure aluminum. application cold-rolled aluminum undergoing cycling highlights potential situ thermally activated mechanisms linked microstructural changes such viscoplasticity, static recovery recrystallization metals. Results were confirmed using Electron Back-Scattering Diffraction measurements.