Grain nucleation and formation in Mg-Zr alloys

Qian, M. and StJohn, D. H. (2009). Grain nucleation and formation in Mg-Zr alloys. In: D M Stefanescu, Hideyuki Yasuda and N R Green, International Journal of Cast Metals Research: Proceedings of the 2nd International Conference on Advances in Solidification Processes ICASP-2. 2nd International Conference on Advances in Solidification Processes ICASP-2, Seggau Castle, Graz, Austria, (256-259). 17-20 June, 2008. doi:10.1179/136404609X367885


Author Qian, M.
StJohn, D. H.
Title of paper Grain nucleation and formation in Mg-Zr alloys
Conference name 2nd International Conference on Advances in Solidification Processes ICASP-2
Conference location Seggau Castle, Graz, Austria
Conference dates 17-20 June, 2008
Proceedings title International Journal of Cast Metals Research: Proceedings of the 2nd International Conference on Advances in Solidification Processes ICASP-2   Check publisher's open access policy
Journal name International Journal of Cast Metals Research   Check publisher's open access policy
Place of Publication United Kingdom
Publisher Maney Publishing
Publication Year 2009
Year available 2009
Sub-type Fully published paper
DOI 10.1179/136404609X367885
ISSN 1743-1336
1364-0461
Editor D M Stefanescu
Hideyuki Yasuda
N R Green
Volume 22
Issue 1-4
Start page 256
End page 259
Total pages 4
Language eng
Abstract/Summary Zirconium is the most potent nucleant discovered to date for magnesium. This work reports the grain nucleation and formation characteristics in zirconium-inoculated magnesium melts. It was found that nucleation of magnesium grains occurred on two types of zirconium nucleants, where the first type were small and round, suggesting that they were formed by precipitation, and the other type were larger and irregularly shaped, similar to undissolved particles. Subsequent growth of the magnesium halo structures after nucleation could occur either spherically or dendritically under similar cooling conditions but under well-inoculated conditions they grew spherically in general. Hence, achieving a high level of dissolved Zr content is not only essential to the nucleation process but also important for control of the subsequent growth morphologies of the halo structures. The nucleation process can be understood by an adsorption mechanism.
Subjects C1
861206 Structural Metal Products
861203 Metal Castings
0912 Materials Engineering
091207 Metals and Alloy Materials
Keyword Magnesium
Zirconium
Nucleation
Growth
Q-Index Code C1
Q-Index Status Confirmed Code
Institutional Status UQ

 
Versions
Version Filter Type
Citation counts: TR Web of Science Citation Count  Cited 18 times in Thomson Reuters Web of Science Article | Citations
Scopus Citation Count Cited 24 times in Scopus Article | Citations
Google Scholar Search Google Scholar
Created: Wed, 25 Nov 2009, 21:36:08 EST by Ms Lynette Adams on behalf of School of Mechanical and Mining Engineering