The effect of grain refinement on hot tearing in AZ91D magnesium alloy
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The effect of grain refinement on hot tearing in AZ91D magnesium alloy. / Davis, T.; Bichler, L.; D’Elia, F. et al.
Magnesium Technology 2017. Hrsg. / Neale R. Neelameggham; Alok Singh; Kiran N. Solanki; Dmytro Orlov. Springer International Publishing AG, 2017. S. 653-660 (Minerals, Metals and Materials Series; Band Part F8).Publikation: Beiträge in Sammelwerken › Aufsätze in Konferenzbänden › Forschung › begutachtet
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TY - CHAP
T1 - The effect of grain refinement on hot tearing in AZ91D magnesium alloy
AU - Davis, T.
AU - Bichler, L.
AU - D’Elia, F.
AU - Hort, N.
PY - 2017
Y1 - 2017
N2 - The AZ91D magnesium alloy is a popular casting alloy used for diverse automotive applications, despite its high susceptibility to hot tearing during casting solidification. In the metalcasting industry, hot tearing is manipulated via cooling rate, alloy composition or mold design optimization. In this work, the effect of grain refinement on hot tearing was quantitatively studied and the relationship between the alloy’s cooling rate and in situ force evolution during casting solidification was related to the severity of hot tears. The results suggest that the load evolution rate and microstructure were critical determinants of the hot tear severity for both unrefined and grain-refined alloys. The grain refiners were seen to significantly reduce the overall force and force-rate evolution, which contributed to the elimination of hot tearing in the AZ91D alloy under standard casting conditions.
AB - The AZ91D magnesium alloy is a popular casting alloy used for diverse automotive applications, despite its high susceptibility to hot tearing during casting solidification. In the metalcasting industry, hot tearing is manipulated via cooling rate, alloy composition or mold design optimization. In this work, the effect of grain refinement on hot tearing was quantitatively studied and the relationship between the alloy’s cooling rate and in situ force evolution during casting solidification was related to the severity of hot tears. The results suggest that the load evolution rate and microstructure were critical determinants of the hot tear severity for both unrefined and grain-refined alloys. The grain refiners were seen to significantly reduce the overall force and force-rate evolution, which contributed to the elimination of hot tearing in the AZ91D alloy under standard casting conditions.
KW - AZ91D
KW - Grain refinement
KW - Hot tearing
KW - Magnesium alloys
KW - Engineering
UR - http://www.scopus.com/inward/record.url?scp=85042325414&partnerID=8YFLogxK
U2 - 10.1007/978-3-319-52392-7_90
DO - 10.1007/978-3-319-52392-7_90
M3 - Article in conference proceedings
AN - SCOPUS:85042325414
SN - 978-3-319-52391-0
T3 - Minerals, Metals and Materials Series
SP - 653
EP - 660
BT - Magnesium Technology 2017
A2 - Neelameggham, Neale R.
A2 - Singh, Alok
A2 - Solanki, Kiran N.
A2 - Orlov, Dmytro
PB - Springer International Publishing AG
T2 - International Symposium on Magnesium Technology 2017
Y2 - 26 February 2017 through 2 March 2017
ER -