Effect of annealing on the microstructure and mechanical properties of ultrafine-grained commercially pure Al

A. M. Mavlyutov, T. A. Latynina, M. Yu Murashkin, R. Z. Valiev, T. S. Orlova

Результат исследований: Научные публикации в периодических изданияхстатья

14 Цитирования (Scopus)

Аннотация

The influence of annealing on the microstructure and mechanical properties of ultrafine-grained (UFG) commercially pure aluminum preliminarily subjected to severe plastic deformation by high pressure torsion has been studied. It is found that annealing of the UFG samples in the temperature range 363–473 K for 1 h leads to increases in the conventional yield strength and ultimate tensile strength, which attained maximum values (50 and 30%, respectively) after annealing at 423 K. A key role of nonequilibrium high-angle grain boundaries in the strengthening effect of UFG-Al due to annealing is discussed. The increase in the strength of UFG-Al is accompanied by a significant decrease in its ductility. A new approach of increasing the ductility of UFG-Al with retaining a high strength is proposed. It is an introduction of additional dislocation density to a UFG structure relaxed by annealing.

Язык оригиналаанглийский
Страницы (с-по)1970-1977
Число страниц8
ЖурналPhysics of the Solid State
Том59
Номер выпуска10
DOI
СостояниеОпубликовано - 1 окт 2017

Предметные области Scopus

  • Электроника, оптика и магнитные материалы
  • Физика конденсатов

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