In-situ investigation of precipitation in aluminium alloys via thermal diffusivity from laser flash analysisWednesday (06.11.2019) 11:45 - 12:05 Part of:
In this work, a commercially available laser flash analysis (LFA) device is used for in-situ
precipitation monitoring in aluminium alloys by following thermal diffusivity for the first time.
The LFA measurement methods and data processing are adapted to allow continuous heating
experiments over a wide range of heating rates (0.001–1 K/s). Methods for LFA temperature
calibration and thermal lag correction are suggested. Results of continuous heating of
Al Mn0.5Mg0.5 aluminium alloy from the as-cast state are compared to in-situ differential
scanning calorimetry (DSC) and ex-situ transmission electron microscopy. It is shown
comparing in-situ LFA and DSC substantially improves the interpretation of superimposed
reactions, in particular, the precipitation and dissolution of Mn-containing dispersoids and Mg-
Si-containing secondary particles.