On the influence of settling of (ZrB2)P inoculants on Grain Refinement of Mg-alloys: Experiment and Theoretical Calculation
Publikation: Beiträge in Sammelwerken › Aufsätze in Konferenzbänden › Forschung › begutachtet
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Linking Science and Technology for Global Solution: Proceedings of Symposia held during TMS 2009 Annual Meeting and Exhibition. The Minerals, Metals & Materials Society, 2009. S. 309-313 (Magnesium Technology).
Publikation: Beiträge in Sammelwerken › Aufsätze in Konferenzbänden › Forschung › begutachtet
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TY - CHAP
T1 - On the influence of settling of (ZrB2)P inoculants on Grain Refinement of Mg-alloys
T2 - Magnesium Technology 2009
AU - Günther, R.
AU - Hartig, Ch
AU - Hort, N.
AU - Bormann, R.
PY - 2009
Y1 - 2009
N2 - A simulation method for heterogeneous nucleation has been developed that enables the prediction of the resulting grain size in Mg-alloys as a function of the inoculant particle size distribution, cooling rate, alloy constitution and volumetric content of inoculants. Experiments with (SiC)P and (Al4C3)P have been already successfully performed and verified the model assumptions. In view of the considerably smaller lattice mismatch between ZrB2 and Mg compared to SiC and Al4C3, respectively, (ZrB2)P should act even more as potent inoculant for grain refinement. However, the larger density of ZrB2 leads to sedimentation of the inoculants that greatly alters the particle size distribution and therefore the efficiency of grain refinement. A theoretical estimate for the final grain size under consideration of the settling effect has been performed and will be discussed in view of experimental results.
AB - A simulation method for heterogeneous nucleation has been developed that enables the prediction of the resulting grain size in Mg-alloys as a function of the inoculant particle size distribution, cooling rate, alloy constitution and volumetric content of inoculants. Experiments with (SiC)P and (Al4C3)P have been already successfully performed and verified the model assumptions. In view of the considerably smaller lattice mismatch between ZrB2 and Mg compared to SiC and Al4C3, respectively, (ZrB2)P should act even more as potent inoculant for grain refinement. However, the larger density of ZrB2 leads to sedimentation of the inoculants that greatly alters the particle size distribution and therefore the efficiency of grain refinement. A theoretical estimate for the final grain size under consideration of the settling effect has been performed and will be discussed in view of experimental results.
KW - Casting
KW - Grain refinement
KW - Inoculation
KW - Magnesium alloys
KW - Nucleation and growth
KW - Engineering
UR - http://www.scopus.com/inward/record.url?scp=70349494109&partnerID=8YFLogxK
M3 - Article in conference proceedings
AN - SCOPUS:70349494109
SN - 9780873397308
T3 - Magnesium Technology
SP - 309
EP - 313
BT - Linking Science and Technology for Global Solution
PB - The Minerals, Metals & Materials Society
Y2 - 15 February 2009 through 19 February 2009
ER -