Study of the solidification of AS alloys combining in situ synchrotron diffraction and differential scanning calorimetry

Research output: Contributions to collected editions/worksArticle in conference proceedingsResearchpeer-review

Authors

  • Domonkos Tolnai
  • Gábor Szakács
  • Guillermo Requena
  • Andreas Stark
  • Norbert Schell
  • Karl U. Kainer
  • Norbert Hort

In situ synchrotron diffraction experiments were performed during Differential Scanning Calorimetry (DSC) of AS31, AS33 and AS35 alloys. The samples were encapsulated in stainless steel crucibles during the measurement using an empty crucible as the reference. The samples were heated up to 680°C, melted and solidified in the beginning of the experiment in order to fill the crucible. This short cycle was followed by three subsequent cycles between 400°C and 680°C with 5, 10 and 20 K/min heating and cooling rates with 5 min of holding time in the molten state. The diffraction patterns were recorded every 6 s during the DSC program by a Perkin-Elmer XRD 1622 Flatpanel detector including an acquisition time of 3 s and the collection of reference images. The endothermic and exothermic peaks are in correlation with the dissolution and formation of new diffraction patterns, respectively. During cooling from the liquid state, first, α-Mg dendrites solidify, followed by the formation of Mg2Si and Mg17Al12 intermetallics. The results are correlated with those obtained by thermodynamic simulations performed with the software Pandat.

Original languageEnglish
Title of host publicationLight Metals Technology 2013
EditorsIan Stone, Brian McKay, Zhongyun Fan
Number of pages5
PublisherTrans Tech Publications Ltd
Publication date01.07.2013
Pages286-290
ISBN (print)9783037857663
DOIs
Publication statusPublished - 01.07.2013
Externally publishedYes
Event6th International Light Metals Technology Conference - LMT 2013 - Old Windsor, United Kingdom
Duration: 24.07.201326.07.2013
Conference number: 6

    Research areas

  • Differential scanning calorimetry, In situ synchrotron diffraction, Mg-Al-Si alloys
  • Engineering