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

✍ Scribed by G. Barucca; R. Ferragut; F. Fiori; D. Lussana; P. Mengucci; F. Moia; G. Riontino

Publisher
Elsevier Science
Year
2011
Tongue
English
Weight
825 KB
Volume
59
Category
Article
ISSN
1359-6454

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✦ Synopsis

The formation and evolution of hardening precipitates in a Mg-Y-Nd (WE43) alloy during artificial ageing at 150 and 210 °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 °C of the size, volume fraction and number density of the subnanometer and nanometer particles that evolve in the b 00 phase was obtained. TEM and microhardness results indicate that the hardening mechanism is based on b 00 transformation of pre-precipitates and their growth at 150 °C, while at 210 °C hardening is mainly associated with b 00 ! b 0 transformation.

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