skip to main content

Title: Early stages of spinodal decomposition in Fe–Cr resolved by in-situ small-angle neutron scattering

In-situ, time-resolved small-angle neutron scattering (SANS) investigations of the early stages of the spinodal decomposition process in Fe–35Cr were performed at 773 and 798 K. The kinetics of the decomposition, both in terms of characteristic distance and peak intensity, followed a power-law behaviour from the start of the heat treatment (a′{sup  }= 0.10–0.11 and a″ = 0.67–0.86). Furthermore, the method allows tracking of the high–Q slope, which is a sensitive measure of the early stages of decomposition. Ex-situ SANS and atom probe tomography were used to verify the results from the in-situ investigations. Finally, the in-situ measurement of the evolution of the characteristic distance at 773 K was compared with the predictions from the Cahn-Hilliard-Cook model, which showed good agreement with the experimental data (a′{sup  }= 0.12–0.20 depending on the assumed mobility)
Authors:
;  [1] ;  [2] ;  [3] ;  [4] ; ;  [5]
  1. Department of Applied Physics, Chalmers University of Technology, Fysikgränd 3, S-412 96 Gothenburg (Sweden)
  2. MAX IV Laboratory, Lund University, S-221 00 Lund (Sweden)
  3. (South Africa)
  4. ISIS Facility, Rutherford Appleton Laboratory, Chilton, OX11 0QX Didcot (United Kingdom)
  5. Materials Science and Engineering, KTH Royal Institute of Technology, Brinellvägen 23, S-100 44 Stockholm (Sweden)
Publication Date:
OSTI Identifier:
22412606
Resource Type:
Journal Article
Resource Relation:
Journal Name: Applied Physics Letters; Journal Volume: 106; Journal Issue: 6; Other Information: (c) 2015 AIP Publishing LLC; Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
75 CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND SUPERFLUIDITY; CHROMIUM ALLOYS; COMPARATIVE EVALUATIONS; DECOMPOSITION; HEAT TREATMENTS; IRON BASE ALLOYS; NEUTRON DIFFRACTION; PROBES; SMALL ANGLE SCATTERING; TEMPERATURE DEPENDENCE; TIME RESOLUTION; TOMOGRAPHY