Published September 5, 2017 | Version v1
Journal article Metadata-only

Re-investigation of phase transformations in the Zr-Excel alloy

Creators

  • 1. School of Science, Guangxi University for Nationalities, Nanning, Guangxi (China)
  • 2. Department of Mechanical and Materials Engineering, Queen's University, Kingston, ON (Canada)
  • 3. Department of Chemistry and Chemical Engineering, Royal Military College of Canada, Kingston, ON (Canada)

Description

The thermodynamically equilibrium precipitates that form in the Zr-Excel alloy after long-term (2500 h) annealing at 550 °C were investigated with transmission electron microscopy and X-ray diffraction techniques. The equilibrium precipitates were found to be a form of cubic Zr(Mo,Nb,Fe)2 with about 26.5 at.% Mo substituted by Nb. Differential scanning calorimetry (DSC) heating curves show that the phase transformation sequence is αZr + Zr(Mo,Nb,Fe)2 → αZr + Zr(Mo,Nb,Fe)2 + βZr → αZr + βZr → βZr upon heating the long-term annealing alloy. With the heating rate of 10 °C/min, the αZr is found to transform into βZr at 530 °C, and Zr(Mo,Nb,Fe)2 completely dissolves at a temperature higher than 771 °C, while the αZr disappears at 969 °C. - Highlights: • The precipitates for the Zr-Excel alloys are cubic Zr(Mo,Nb,Fe)2. • The phase transformation sequence for the Zr-Excel alloys is determined. • The phase transformation temperature for the Zr-Excel alloys is determined too.

Availability note (English)

Available from http://dx.doi.org/10.1016/j.jallcom.2017.05.031

Additional details

Identifiers

DOI
10.1016/j.jallcom.2017.05.031;
PII
S0925-8388(17)31614-6;

Publishing Information

Journal Title
Journal of Alloys and Compounds
Journal Volume
716
Journal Page Range
p. 7-12
ISSN
0925-8388
CODEN
JALCEU

INIS

Country of Publication
Netherlands
Country of Input or Organization
International Atomic Energy Agency (IAEA)
INIS RN
49073012
Subject category
S36: MATERIALS SCIENCE;
Descriptors DEI
HEATING RATE; PHASE TRANSFORMATIONS; PRECIPITATION; TRANSMISSION ELECTRON MICROSCOPY; X-RAY DIFFRACTION; ZIRCONIUM ALLOYS
Descriptors DEC
ALLOYS; COHERENT SCATTERING; DIFFRACTION; ELECTRON MICROSCOPY; MICROSCOPY; SCATTERING; SEPARATION PROCESSES; TRANSITION ELEMENT ALLOYS

Optional Information

Copyright
Copyright (c) 2017 Elsevier Science B.V., Amsterdam, The Netherlands, All rights reserved.