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Impeding Nucleation for More Significant Grain Refinement
Authors
Z Fan
F Gao
B Jiang
Z Que
Publication date
10 June 2020
Publisher
'Springer Science and Business Media LLC'
Doi
Abstract
© 2020, The Author(s). Grain refinement has been a topic of extensive research due to its scientific and technological importance as a common industrial practice for over seven decades. The traditional approach to grain refinement has been to reduce nucleation undercooling by the addition of potent nucleant particles. Here we show both theoretically and experimentally that more significant grain refinement can be achieved through increasing nucleation undercooling by using impotent nucleant particles. Based on the concept of explosive grain initiation, this new approach is illustrated by grain initiation maps and grain refinement maps and validated by experiments. It is anticipated that this new approach may lead to a profound change in both nucleation research and industrial practice well beyond metal casting.EPSRC (grant number EP/N007638/1)
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oai:bura.brunel.ac.uk:2438/211...
Last time updated on 18/12/2020