Surface precipitation of supersaturated solutes in a ternary Fe–Au–W alloy and its binary counterparts

Journal article (2020)

Authors

Y. Fu Novel Aerospace Materials - Aerospace Engineering
C. Kwakernaak (OLD) MSE-1
J.C. Brouwer (OLD) MSE-1
W.G. Sloof (OLD) MSE-1
E.H. Brück RST/Fundamental Aspects of Materials and Energy - AS
S. van der Zwaag Novel Aerospace Materials - Aerospace Engineering , Tsinghua University
N.H. van Dijk RST/Fundamental Aspects of Materials and Energy - AS
Research Group
Novel Aerospace Materials (Aerospace Engineering) (TU Delft)
Copyright: © 2020 Y. Fu, C. Kwakernaak, J.C. Brouwer, W.G. Sloof, E.H. Brück, S. van der Zwaag, N.H. van Dijk
DOI: https://doi.org/10.1007/s10853-020-05571-w
More Info
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Published Date

2020

Language

English

Faculty

Aerospace Engineering

Department

Aerospace Structures & Materials

Research Group

Novel Aerospace Materials

Abstract

Abstract: The precipitation of supersaturated solutes at free surfaces in ternary Fe–3Au–4W and binary Fe–3Au and Fe–4W alloys (composition in weight percentage) for different ageing times was investigated at a temperature of 700 °C. The time evolution of the surface precipitation is compared among the three alloys to investigate the interplay between the Au and W solutes in the ternary system. The Au-rich grain-interior surface precipitates show a similar size and kinetics in the Fe–Au–W and Fe–Au alloys, while the W-rich grain-interior surface precipitates show a smaller size and a higher number density in the Fe–Au–W alloy compared to the Fe–W alloy. The kinetics of the precipitation on the external free surface for the ternary Fe–Au–W alloy is compared to the previously studied precipitation on the internal surfaces of the grain-boundary cavities during creep loading of the same alloy. Graphical abstract: [Figure not available: see fulltext.]