MATERIALS TRANSACTIONS
Online ISSN : 1347-5320
Print ISSN : 1345-9678
ISSN-L : 1345-9678
Evolution of Solidification Structures in Fe-Mn-Si-Cr Shape Memory Alloy in Centrifugal Casting
Kenichiro ItoRyoji SaharaSusan FarjamiTadakatsu MaruyamaHiroshi Kubo
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2006 Volume 47 Issue 6 Pages 1584-1594

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Abstract

In aiming at obtaining thin columnar structures in the centrifugal casting of Fe-28Mn-6Si-5Cr (mass%) shape memory alloy (SMA), evolution of solidified macroscopic structures is investigated by solidification experiments and simulation using a coupled finite volume-cellular automaton (FV-CA) model.
In the temperature gradient-crystal growth rate (G-V) diagram of solidification, the columnar to equi-axed transition (CET) line that indicates the boundary of two different structural regions is identified from the simulation calculation. The macroscopic structure of joining pipes of Fe-28Mn-6Si-5Cr SMA produced by centrifugal casting is elucidated to reside in a deep region of columnar structure in the G-V diagram. It is concluded that finer columnar structure could be obtained by increasing the rotation speed of centrifugal casting mould and by increasing the cooling rate of the casting.

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© 2006 The Japan Institute of Metals and Materials
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