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  4. Influence of Minor Additions on Icosahedral Short-Range Order (ISRO) and Its Consequences on Nucleation and Solidification Growth Kinetics in fcc Alloys
 
research article

Influence of Minor Additions on Icosahedral Short-Range Order (ISRO) and Its Consequences on Nucleation and Solidification Growth Kinetics in fcc Alloys

Zollinger, J.
•
Rappaz, M.  
November 1, 2018
Transactions Of The Indian Institute Of Metals

The present contribution reviews the recent progress related to the influence of icosahedral short-range order (ISRO) and icosahedral quasicrystal (iQC) formation on the solidification of fcc alloys through minor solute element additions. From intensive crystallographic analysis of multi-twinned region in as-cast Al-based and Au-based fcc alloys, it has been shown recently that a so-called iQC-mediated nucleation mechanism occurs when a few hundred ppm of Cr and Ir, respectively, are added to the melt (Kurtuldu et al. in Acta Mater 61(19):7098-7108, 2013; Acta Mater 70:240-248, 2014). Similarly, it appears that the growth directions of dendrites in Al-Zn/Cr are also influenced by ISRO in the liquid, thus showing an attachment kinetics effect (Kurtuldu in Influence of trace elements on the nucleation and solidification morphologies of fcc alloys and relationship with icosahedral quasicrystal formation, 2014). Similar observations have been made recently in pink gold alloys with Ir additions, when the solidification speed is increased (Zollinger et al. in Acta Mater, 2018).

  • Details
  • Metrics
Type
research article
DOI
10.1007/s12666-018-1411-z
Web of Science ID

WOS:000449788900005

Author(s)
Zollinger, J.
Rappaz, M.  
Date Issued

2018-11-01

Publisher

SPRINGER INDIA

Published in
Transactions Of The Indian Institute Of Metals
Volume

71

Issue

11

Start page

2635

End page

2638

Subjects

Metallurgy & Metallurgical Engineering

•

Metallurgy & Metallurgical Engineering

•

gold alloys

•

nucleation

•

growth kinetic

•

growth direction

•

quasicrystals

•

solidification

•

al

•

cr

•

phase

Editorial or Peer reviewed

REVIEWED

Written at

EPFL

EPFL units
LSMX  
Available on Infoscience
December 13, 2018
Use this identifier to reference this record
https://infoscience.epfl.ch/handle/20.500.14299/152624
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