Investigation of compression behavior of Mg-4Zn-2(Nd, Gd)-0.5Zr at 350°C by in situ synchrotron radiation diffraction
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Investigation of compression behavior of Mg-4Zn-2(Nd, Gd)-0.5Zr at 350°C by in situ synchrotron radiation diffraction. / Buzolin, R. H.; Tolnai, D.; Mendis, C. L. 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. 103-107 (Magnesium Technology; Band 01/2015).Publikation: Beiträge in Sammelwerken › Aufsätze in Konferenzbänden › Forschung › begutachtet
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TY - CHAP
T1 - Investigation of compression behavior of Mg-4Zn-2(Nd, Gd)-0.5Zr at 350°C by in situ synchrotron radiation diffraction
AU - Buzolin, R. H.
AU - Tolnai, D.
AU - Mendis, C. L.
AU - Stark, A.
AU - Schell, N.
AU - Pinto, H.
AU - Kainer, K. U.
AU - Hort, N.
N1 - Conference code: 144
PY - 2015
Y1 - 2015
N2 - As-cast Mg-4Zn-0.5Zr, Mg-4Zn-2Gd-0.5Zr and Mg-4Zn-2Nd- 0.5Zr alloys were investigated by in situ synchrotron radiation diffraction during hot compression at 350 °C using the facilities of P07 beamline of Petra III at Deutsches Elektronen Synchrotron (DESY), Hamburg, Germany. The specimens were heated at a rate of 100 K/min and compressed with an initial strain rate of 1.1 x 10"3 s"1 up to 30 % strain. The addition of rare earth elements improved the yield strength from 23 MPa in the Mg-4Zn-0.5Zr alloy up to 40 MPa in the alloy with Nd and Gd. Continuous dynamic recrystallization played an important role in the Mg-4Zn- 0.5Zr alloy during deformation and twinning was not dominant. Discontinuous dynamic recrystallization was observed in the in the Mg-4Zn-2Gd-0.5Zr along the grain boundary regions while the grains remained largely without any recrystallization. In the Mg-4Zn-2Gd-0.5Zr and Mg-4Zn-2Nd-0.5Zr alloys the contribution of twinning to deformation was observed at 350 °C. Reasons for these differences will be discussed with respect to microstructures of the alloys.
AB - As-cast Mg-4Zn-0.5Zr, Mg-4Zn-2Gd-0.5Zr and Mg-4Zn-2Nd- 0.5Zr alloys were investigated by in situ synchrotron radiation diffraction during hot compression at 350 °C using the facilities of P07 beamline of Petra III at Deutsches Elektronen Synchrotron (DESY), Hamburg, Germany. The specimens were heated at a rate of 100 K/min and compressed with an initial strain rate of 1.1 x 10"3 s"1 up to 30 % strain. The addition of rare earth elements improved the yield strength from 23 MPa in the Mg-4Zn-0.5Zr alloy up to 40 MPa in the alloy with Nd and Gd. Continuous dynamic recrystallization played an important role in the Mg-4Zn- 0.5Zr alloy during deformation and twinning was not dominant. Discontinuous dynamic recrystallization was observed in the in the Mg-4Zn-2Gd-0.5Zr along the grain boundary regions while the grains remained largely without any recrystallization. In the Mg-4Zn-2Gd-0.5Zr and Mg-4Zn-2Nd-0.5Zr alloys the contribution of twinning to deformation was observed at 350 °C. Reasons for these differences will be discussed with respect to microstructures of the alloys.
KW - Deformation behaviour
KW - In situ
KW - RE additions
KW - Synchrotron radiation
KW - ZK40
KW - Engineering
UR - http://www.scopus.com/inward/record.url?scp=84942082826&partnerID=8YFLogxK
U2 - 10.1002/9781119093428.ch21
DO - 10.1002/9781119093428.ch21
M3 - Article in conference proceedings
AN - SCOPUS:84942082826
T3 - Magnesium Technology
SP - 103
EP - 107
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
T2 - 144th Annual Meeting and Exhibition of Magnesium Technology - TMS 2015
Y2 - 15 March 2015 through 19 March 2015
ER -