Atomic scale investigation of dynamic precipitation and grain boundary segregation in a 6061 aluminium alloy nanostructured by ECAP

X. Sauvage, M. Yu Murashkin, R. Z. Valiev

Результат исследований: Научные публикации в периодических изданияхстатьярецензирование

26 Цитирования (Scopus)

Аннотация

A commercial 6061 aluminium alloy was processed by ECAP and subsequently aged to nucleate nanoscaled precipitates within the ultrafine grain structure. The mechanical behaviour was investigated thanks to tensile tests and the microstructure was characterized at the atomic scale using Atom Probe Tomography. These experimental data clearly reveal that extensive dynamic precipitation and grain boundary segregation occurred during ECAP. These features lead to a significant increase of the strength of the alloy. Further ageing after ECAP processing gives rise to an additional increase of the strength linked to a larger precipitate density. A comparison of the morphology and the composition of precipitates nucleated during ECAP and during the standard T6 ageing treatment shows that the precipitation kinetic is affected by the severe plastic deformation.

Язык оригиналаанглийский
Страницы (с-по)11-15
Число страниц5
ЖурналKovove Materialy
Том49
Номер выпуска1
DOI
СостояниеОпубликовано - 16 мая 2011

Предметные области Scopus

  • Химия материалов
  • Металлы и сплавы
  • Общее машиностроение
  • Сопротивление материалов

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