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In-situ investigation of precipitation in aluminium alloys via thermal diffusivity from laser flash analysis

Wednesday (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.

Dr.-Ing. Benjamin Milkereit
University of Rostock
Additional Authors:
  • Richard Kemsies
  • André Lindemann
    Netzsch Gerätebau GmbH
  • Christoph Schick
    University od Rostock
  • Olaf Kessler
    University of Rostock