Please use this identifier to cite or link to this item: http://bura.brunel.ac.uk/handle/2438/17602
Title: Abnormal Grain Refinement Behavior in High-Pressure Die Casting of Pure Mg with Addition of Zr as Grain Refiner
Authors: Yang, W
Ji, S
Zhang, R
Zhang, J
Liu, L
Issue Date: 10-Aug-2018
Publisher: Springer Verlag
Citation: JOM, 2018, 70 (11), pp. 2555 - 2560
Abstract: Abnormal grain refinement behavior was found during high-pressure die casting of pure Mg with addition of Zr as grain refiner. The grain size of diecast pure Mg was only 6.71 lm, whereas it abnormally increased to 18.93 lm after addition of 1 wt.% Zr particles, indicating loss of the grain refinement effect. Further experimental results showed that a melt quenching effect in combination with an increased number of effective nuclei could result in extremely refined grains in die-cast pure Mg, because many MgO particles could be activated simultaneously as nuclei. Therefore, it can be suggested that, before nucleation in high-pressure die-casting conditions, in the absence of effective (Zr) particles with small misfit, particles (MgO) with larger misfit and high number density might represent the most effective grain refiner.
URI: http://bura.brunel.ac.uk/handle/2438/17602
DOI: http://dx.doi.org/10.1007/s11837-018-3087-6
ISSN: 1047-4838
http://dx.doi.org/10.1007/s11837-018-3087-6
Appears in Collections:Dept of Mechanical Aerospace and Civil Engineering Embargoed Research Papers

Files in This Item:
File Description SizeFormat 
FullText.docx21.71 kBMicrosoft Word XMLView/Open


Items in BURA are protected by copyright, with all rights reserved, unless otherwise indicated.