Revealing dendritic pattern formation in Ni, Fe and Co alloys using synchrotron tomography
File(s)
Accepted version
Author(s)
Type
Journal Article
Abstract
The microstructural patterns formed during liquid to solid phase transformations control the properties of a wide range of materials. We developed a novel methodology that allows in situ quantification of the microstructures formed during solidification of high temperature advanced alloys. The patterns formed are captured in 4D (3D plus time) using a methodology which exploits three separate advances: a bespoke high temperature environment cell; the development of high X-ray contrast alloys; and a novel environmental encapsulation system. This methodology is demonstrated on Ni, Fe, and Co advanced alloy systems, revealing dendritic pattern formation. We present detailed quantification of microstructural pattern evolution in a novel high attenuation contrast Co-Hf alloy, including microstructural patterning and dendrite tip velocity. The images are quantified to provide 4D experimental data of growth and coarsening mechanisms in Co alloys, which are used for a range of applications from energy to aerospace.
Date Issued
2017-02-08
Date Acceptance
2017-02-05
Citation
Acta Materialia, 2017, 128, pp.241-248
ISSN
1873-2453
Publisher
Elsevier
Start Page
241
End Page
248
Journal / Book Title
Acta Materialia
Volume
128
Copyright Statement
© 2017, Elsevier Ltd. All rights reserved. This manuscript is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International http://creativecommons.org/licenses/by-nc-nd/4.0/
Sponsor
Engineering & Physical Science Research Council (E
Engineering & Physical Science Research Council (EPSRC)
Engineering & Physical Science Research Council (E
Grant Number
EP/I021566/1
EP/L001748/1
RG75356
Subjects
Science & Technology
Technology
Materials Science, Multidisciplinary
Metallurgy & Metallurgical Engineering
Materials Science
Superalloys
Synchrotron tomography
Interfacial patterns
4D imaging
Dendritic microstructures
SINGLE-CRYSTAL SOLIDIFICATION
WT.PERCENT CU ALLOY
IN-SITU OBSERVATION
X-RAY TOMOGRAPHY
DIRECTIONAL SOLIDIFICATION
BASE SUPERALLOYS
ALUMINUM-ALLOYS
REAL-TIME
SIMULATION
SELECTION
Materials
0912 Materials Engineering
0913 Mechanical Engineering
Publication Status
Published