Published June 2011 | Version v1
Journal article Metadata-only

Formation and evolution of the hardening precipitates in a Mg-Y-Nd alloy

Creators

  • 1. Dipartimento di Fisica e Ingegneria dei Materiali e del Territorio, Universita Politecnica delle Marche, Via Brecce Bianche, I-60131 Ancona (Italy)
  • 2. Dipartimento di Fisica, LNESS and CNISM, Politecnico di Milano, Via Anzani 42, I-22100 Como (Italy)
  • 3. Dipartimento SAIFET, Sezione di Scienze Fisiche, Universita Politecnica delle Marche, Via Brecce Bianche, I-60131 Ancona (Italy)
  • 4. Dipartimento di Chimica IFM and NIS Centre, Universita di Torino, Via P. Giuria 9, I-10125 Torino (Italy)

Description

The formation and evolution of hardening precipitates in a Mg-Y-Nd (WE43) alloy during artificial ageing at 150 and 210 deg. C is followed by small angle X-ray scattering (SAXS) measurements, Vickers microhardness tests and transmission electron microscopy (TEM) observations. A quantitative description of the alloy studied during the early and advanced stages of the precipitation sequence is presented. In situ SAXS evolution at 210 deg. C of the size, volume fraction and number density of the subnanometer and nanometer particles that evolve in the β'' phase was obtained. TEM and microhardness results indicate that the hardening mechanism is based on β'' transformation of pre-precipitates and their growth at 150 deg. C, while at 210 deg. C hardening is mainly associated with β'' → β' transformation.

Availability note (English)

Available from http://dx.doi.org/10.1016/j.actamat.2011.03.038

Additional details

Identifiers

DOI
10.1016/j.actamat.2011.03.038;
PII
S1359-6454(11)00185-6;

Publishing Information

Journal Title
Acta Materialia
Journal Volume
59
Journal Issue
10
Journal Page Range
p. 4151-4158
ISSN
1359-6454
CODEN
ACMAFD

INIS

Country of Publication
United Kingdom
Country of Input or Organization
International Atomic Energy Agency (IAEA)
INIS RN
43042349
Subject category
S36: MATERIALS SCIENCE;
Descriptors DEI
AGING; CALORIMETRY; DENSITY; MAGNESIUM ALLOYS; MICROHARDNESS; PARTICLES; PRECIPITATION; PRECIPITATION HARDENING; SMALL ANGLE SCATTERING; TRANSMISSION ELECTRON MICROSCOPY; X-RAY DIFFRACTION
Descriptors DEC
ALLOYS; COHERENT SCATTERING; DIFFRACTION; ELECTRON MICROSCOPY; HARDENING; HARDNESS; MECHANICAL PROPERTIES; MICROSCOPY; PHYSICAL PROPERTIES; SCATTERING; SEPARATION PROCESSES

Optional Information

Copyright
Copyright (c) 2011 Elsevier Science B.V., Amsterdam, The Netherlands, All rights reserved.