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In situ and ex situ studies of anomalous eutectic formation in undercooled Ni–Sn alloys

Zhao, Rijie and Wang, Yeqing and Gao, J. and Baker, Evan B. and Matson, Douglas M. and Kolbe, Matthias and Chuang, Andrew (Chih-Pin) and Ren, Yang (2020) In situ and ex situ studies of anomalous eutectic formation in undercooled Ni–Sn alloys. Acta Materialia, 197, pp. 198-211. Elsevier. doi: 10.1016/j.actamat.2020.07.048. ISSN 1359-6454.

Full text not available from this repository.

Official URL: https://www.sciencedirect.com/science/article/abs/pii/S1359645420305565

Abstract

Anomalous eutectic formation in undercooled Ni–Sn alloys was investigated by in situ X-ray diffraction and ex situ remelting and annealing experiments. Dynamic recrystallization and partial remelting of primary solids followed by repeated nucleation and growth of eutectic grains in the mushy zone were revealed by time-resolved X-ray diffraction. Ex situ experiments demonstrated that partial remelting of near-equilibrium solidified alloys of eutectic or near-eutectic composition can convert regular lamellar eutectic into anomalous eutectic, whereas high-temperature annealing of splat-quenched alloys of similar composition can convert eutectic or two-phase dendrites into anomalous eutectic. It is concluded that compared to ripening in solid-states, partial remelting of eutectic or two-phase dendrites in a mushy zone provides a more realistic mechanism for anomalous eutectic formation in undercooled solidification of Ni–Sn eutectic alloys.

Item URL in elib:https://elib.dlr.de/135700/
Document Type:Article
Title:In situ and ex situ studies of anomalous eutectic formation in undercooled Ni–Sn alloys
Authors:
AuthorsInstitution or Email of AuthorsAuthor's ORCID iD
Zhao, RijieKey Laboratory of Electromagnetic Processing of Materials (Ministry of Education), Northeastern University, Shenyang 110819, ChinaUNSPECIFIED
Wang, YeqingKey Laboratory of Electromagnetic Processing of Materials (Ministry of Education), Northeastern University, Shenyang 110819, ChinaUNSPECIFIED
Gao, J.Key Lab of Electromagnetic Processing of MaterialsUNSPECIFIED
Baker, Evan B.Department of Mechanical Engineering, Tufts University, Medford, MA 02155, United StatesUNSPECIFIED
Matson, Douglas M.Department of Mechanical Engineering, Tufts University, Medford, MA 02155, United StatesUNSPECIFIED
Kolbe, MatthiasInstitut für Materialphysik im WeltraumUNSPECIFIED
Chuang, Andrew (Chih-Pin)Argonne National Laboratory, USAUNSPECIFIED
Ren, YangArgonne National Laboratory, USAUNSPECIFIED
Date:2020
Journal or Publication Title:Acta Materialia
Refereed publication:Yes
Open Access:No
Gold Open Access:No
In SCOPUS:Yes
In ISI Web of Science:Yes
Volume:197
DOI :10.1016/j.actamat.2020.07.048
Page Range:pp. 198-211
Editors:
EditorsEmailEditor's ORCID iD
UNSPECIFIEDElsevierUNSPECIFIED
Publisher:Elsevier
ISSN:1359-6454
Status:Published
Keywords:anomalous eutectic, remelting, in situ X-ray diffraction, Ni-Sn
HGF - Research field:Aeronautics, Space and Transport
HGF - Program:Space
HGF - Program Themes:Research under Space Conditions
DLR - Research area:Raumfahrt
DLR - Program:R FR - Research under Space Conditions
DLR - Research theme (Project):R - Materials Research and Microgravity (MuM)
Location: Köln-Porz
Institutes and Institutions:Institute of Materials Physics in Space
Deposited By: Kolbe, Matthias
Deposited On:10 Aug 2020 08:12
Last Modified:10 Aug 2020 08:12

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