Influences of Y additions on the hot tearing susceptibility of Mg-1.5wt.%Zn alloys
Research output: Contributions to collected editions/works › Article in conference proceedings › Research › peer-review
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Light Metals Technology 2013. ed. / Ian Stone; Brian McKay; Zhongyun Fan. Trans Tech Publications Ltd, 2013. p. 306-310 (Materials Science Forum; Vol. 765).
Research output: Contributions to collected editions/works › Article in conference proceedings › Research › peer-review
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TY - CHAP
T1 - Influences of Y additions on the hot tearing susceptibility of Mg-1.5wt.%Zn alloys
AU - Wang, Zhi
AU - Huang, Yuan Ding
AU - Srinivasan, Amirthalingam
AU - Liu, Zheng
AU - Kainer, Karl Ulrich
AU - Hort, Norbert
N1 - Conference code: 6
PY - 2013/7/1
Y1 - 2013/7/1
N2 - The influences of Y (0.2, 2 and 4 wt.%) additions on the hot tearing behaviour of Mg-1.5Zn alloys were investigated using a constrained rod casting (CRC) apparatus equipped with a load cell and data acquisition system. The initiation of hot tearing was monitored during CRC experiments. It corresponds to a drop in load on the hot tearing curves. The experimental results indicate that, the hot tearing susceptibility defined by the total crack volume, which was measured by the wax penetration method, decreases with increasing the content of Y at a mould temperature of 250 °C. The reduced susceptibility is attributed to the effect of Y on the solidification behaviour: it shortens the freezing range and reduces the grain size. The highest susceptibility is observed for Mg-1.5Zn-0.2Y alloy. It is caused by its coarse microstructure and relatively larger solidification range. In contrast, the lowest susceptibility is observed for Mg-1.5Zn-4Y alloy with a small equiaxed grain microstructure. In addition, the healing of hot cracks by the subsequent refilling of the remained liquid at the later stage of solidification is also beneficial for the alleviation of hot tearing susceptibility in Mg-1.5Zn-4Y alloy.
AB - The influences of Y (0.2, 2 and 4 wt.%) additions on the hot tearing behaviour of Mg-1.5Zn alloys were investigated using a constrained rod casting (CRC) apparatus equipped with a load cell and data acquisition system. The initiation of hot tearing was monitored during CRC experiments. It corresponds to a drop in load on the hot tearing curves. The experimental results indicate that, the hot tearing susceptibility defined by the total crack volume, which was measured by the wax penetration method, decreases with increasing the content of Y at a mould temperature of 250 °C. The reduced susceptibility is attributed to the effect of Y on the solidification behaviour: it shortens the freezing range and reduces the grain size. The highest susceptibility is observed for Mg-1.5Zn-0.2Y alloy. It is caused by its coarse microstructure and relatively larger solidification range. In contrast, the lowest susceptibility is observed for Mg-1.5Zn-4Y alloy with a small equiaxed grain microstructure. In addition, the healing of hot cracks by the subsequent refilling of the remained liquid at the later stage of solidification is also beneficial for the alleviation of hot tearing susceptibility in Mg-1.5Zn-4Y alloy.
KW - Casting
KW - Hot tearing
KW - Mg-Zn-Y alloys
KW - Microstructure
KW - Solidification
KW - Engineering
UR - http://www.scopus.com/inward/record.url?scp=84883004880&partnerID=8YFLogxK
UR - https://www.mendeley.com/catalogue/a19af803-e539-37c1-a752-5ceb9640d679/
U2 - 10.4028/www.scientific.net/MSF.765.306
DO - 10.4028/www.scientific.net/MSF.765.306
M3 - Article in conference proceedings
AN - SCOPUS:84883004880
SN - 9783037857663
T3 - Materials Science Forum
SP - 306
EP - 310
BT - Light Metals Technology 2013
A2 - Stone, Ian
A2 - McKay, Brian
A2 - Fan, Zhongyun
PB - Trans Tech Publications Ltd
T2 - 6th International Light Metals Technology Conference - LMT 2013
Y2 - 24 July 2013 through 26 July 2013
ER -