NDLI: Orientation Selection and Microstructural Evolution in Directionally Solidified Tb$_{0.3}$Dy$_{0.7}$Fe$

Content Provider	Springer Nature Link
Author	Palit, Mithun Banumathy, S. Singh, A. K. Pandian, S. Chattopadhyay, Kamanio
Copyright Year	2016
Abstract	Tb$_{0.3}$Dy$_{0.7}$Fe$_{1.95}$ alloy was directionally solidified by using a modified Bridgman technique at a wide range of growth rates of 5 to 100 cm/h. The directionally grown samples exhibited plane front solidification morphology up to a growth rate of 90 cm/h. Typical island banding feature was observed closer to the chilled end, which eventually gave rise to irregular peritectic coupled growth (PCG). The PCG gained prominence with an increase in the growth rate. The texture study revealed formation of strong 〈311〉 texture in a lower growth rate regime, 〈110〉 and “rotated 〈110〉” in an intermediate growth regime, and 〈112〉 in a higher growth rate regime. In-depth analysis of the atomic configuration of a solid–liquid interface revealed that the growth texture is influenced by the kinetics of atomic attachment to the solid–liquid interface, which is intimately related to a planar packing fraction and an atomic stacking sequence of the interfacial plane. The mechanism proposed in this article is novel and will be useful in addressing the orientation selection mechanism of topologically closed packed intermetallic systems. The samples grown at a higher growth rate exhibit larger magnetostriction (λ) and dλ/dH owing to the absence of pro-peritectic (Tb,Dy)Fe$_{3}$ and formation of 〈112〉 texture, which lies closer to the easy magnetization direction (EMD).
Starting Page	1729
Ending Page	1739
Page Count	11
File Format	PDF
ISSN	10735623
Journal	Metallurgical and Materials Transactions A
Volume Number	47
Issue Number	4
e-ISSN	15431940
Language	English
Publisher	Springer US
Publisher Date	2016-02-04
Publisher Place	New York
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	Metallic Materials Characterization and Evaluation of Materials Structural Materials Surfaces and Interfaces, Thin Films Nanotechnology
Content Type	Text
Resource Type	Article
Subject	Mechanics of Materials Metals and Alloys Condensed Matter Physics

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