In situ synchrotron radiation diffraction during solidification of Mgl5Gd: Effect of cooling rate
Publikation: Beiträge in Sammelwerken › Aufsätze in Konferenzbänden › Forschung › begutachtet
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In situ synchrotron radiation diffraction during solidification of Mgl5Gd : Effect of cooling rate. / Szakács, G.; Mendis, C. L.; Tolnai, D. et al.
Magnesium Technology 2015 - Held During TMS 2015 144th Annual Meeting and Exhibition. Hrsg. / Michele V. Manuel; Alok Singh; Martyn Alderman; Martyn Alderman; Neale R. Neelameggham. The Minerals, Metals & Materials Society, 2015. S. 79-84 (Magnesium Technology; Band 01/2015).Publikation: Beiträge in Sammelwerken › Aufsätze in Konferenzbänden › Forschung › begutachtet
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TY - CHAP
T1 - In situ synchrotron radiation diffraction during solidification of Mgl5Gd
T2 - 144th Annual Meeting and Exhibition of Magnesium Technology - TMS 2015
AU - Szakács, G.
AU - Mendis, C. L.
AU - Tolnai, D.
AU - Stark, A.
AU - Schell, N.
AU - Ovri, H.
AU - Wolff, M.
AU - Kainer, K. U.
AU - Grobner, J.
AU - Schmid-Fetzer, R.
AU - Hort, N.
N1 - Conference code: 144
PY - 2015
Y1 - 2015
N2 - In situ synchrotron radiation diffraction experiments were performed during the solidification of Mgl5Gd at the P07 (HEMS) Beamline of PETRA III at DESY. The measurements were carried out in the chamber of a modified DIL 805A/D dilatometer with a beam energy of 100 keV. The temperature was controlled by type S thermocouples welded on the steel lid of the graphite crucibles containing the samples. The two dimensional diffraction patterns were recorded with a Perkin Elmer 1621 Flatpanel. The phase evolution observed during cooling at rates of 5, 20 and 100 K/min show formation of GdMg3 at elevated temperatures, which transforms into GdMg5 during continued cooling. Phases were identified with the information from the Pearson's database for crystalline structures. This is different from that predicted with thermodynamic databases. Although the equilibrium phase diagram suggests a simple eutectic solidification, the experiments show a metastable phase formation and its transformation. The formation of GdMg3 becomes more pronounced at higher cooling rates.
AB - In situ synchrotron radiation diffraction experiments were performed during the solidification of Mgl5Gd at the P07 (HEMS) Beamline of PETRA III at DESY. The measurements were carried out in the chamber of a modified DIL 805A/D dilatometer with a beam energy of 100 keV. The temperature was controlled by type S thermocouples welded on the steel lid of the graphite crucibles containing the samples. The two dimensional diffraction patterns were recorded with a Perkin Elmer 1621 Flatpanel. The phase evolution observed during cooling at rates of 5, 20 and 100 K/min show formation of GdMg3 at elevated temperatures, which transforms into GdMg5 during continued cooling. Phases were identified with the information from the Pearson's database for crystalline structures. This is different from that predicted with thermodynamic databases. Although the equilibrium phase diagram suggests a simple eutectic solidification, the experiments show a metastable phase formation and its transformation. The formation of GdMg3 becomes more pronounced at higher cooling rates.
KW - In situ
KW - Mg-Gd binary alloy
KW - Phase formation
KW - Solidification
KW - Synchrotron radiation diffraction
KW - Engineering
UR - http://www.scopus.com/inward/record.url?scp=84942112238&partnerID=8YFLogxK
U2 - 10.1002/9781119093428.ch17
DO - 10.1002/9781119093428.ch17
M3 - Article in conference proceedings
AN - SCOPUS:84942112238
T3 - Magnesium Technology
SP - 79
EP - 84
BT - Magnesium Technology 2015 - Held During TMS 2015 144th Annual Meeting and Exhibition
A2 - Manuel, Michele V.
A2 - Singh, Alok
A2 - Alderman, Martyn
A2 - Alderman, Martyn
A2 - Neelameggham, Neale R.
PB - The Minerals, Metals & Materials Society
Y2 - 15 March 2015 through 19 March 2015
ER -