Grain boundary sliding and rotational mechanisms of intragranular deformation at different creep stages of high-purity aluminum polycrystals at various temperatures and stresses

V. E. Panin, N. S. Surikova, T. F. Elsukova, I. V. Vlasov, D. V. Borisyuk

Результат исследований: Материалы для журналаСтатья

3 Цитирования (Scopus)

Аннотация

In the paper we show that grain boundary sliding dominates in the creep of A999 aluminum polycrystals and is accommodated by rotation modes of intragranular deformation. Accommodation mechanisms strongly depend on the applied stress σ and creep temperature T. At low σ and T, accommodation occurs by dislocation glide and mesoscale fragmentation. At high σ and T, there appears lattice curvature, which causes the development of shear bands, multiscale fragmentation, and formation of a quasi-neck with nanosized subgrains and plastic microrotations. Noncrystallographic shears in their subboundaries propagate in local lattice curvature zones under τmax by the plastic distortion mechanism.

Язык оригиналаАнглийский
Страницы (с-по)276-284
Число страниц9
ЖурналMaterials Science and Engineering A
Том733
DOI
СостояниеОпубликовано - 22 авг 2018

ASJC Scopus subject areas

  • Materials Science(all)
  • Condensed Matter Physics
  • Mechanics of Materials
  • Mechanical Engineering

Fingerprint Подробные сведения о темах исследования «Grain boundary sliding and rotational mechanisms of intragranular deformation at different creep stages of high-purity aluminum polycrystals at various temperatures and stresses». Вместе они формируют уникальный семантический отпечаток (fingerprint).

  • Цитировать