Dynamic precipitation, segregation and strengthening of an Al-Zn-Mg-Cu alloy (AA7075) processed by high-pressure torsion

Yidong Zhang, Shenbao Jin, Patrick W. Trimby, Xiaozhou Liao, Maxim Y. Murashkin, Ruslan Z. Valiev, Jizi Liu, Julie M. Cairney, Simon P. Ringer, Gang Sha

Результат исследований: Научные публикации в периодических изданияхстатья

44 Цитирования (Scopus)

Аннотация

Combining transmission Kikuchi diffraction, high resolution transmission electron microscopy and atom probe tomography, we investigated an Al-Zn-Mg-Cu alloy (AA7075) processed by high-pressure torsion (HPT) at room temperature and 200 °C, with an objective to reveal the deformation-induced precipitation and segregation of elements at grain boundaries, and to study their appearance at different processing regimes. Although HPT processing at the two temperatures both induced the formation of ŋ phase, ŋ precipitates formed at the two temperatures have different chemical compositions. The increase of the HPT processing temperature increased significantly segregation of Mg and Cu at grain boundaries. The HPT–induced segregation and decomposition of the alloy have a significant effect on its mechanical strength. Our results open a way for achieving advanced mechanical properties in nanostructured metals and alloys by designing their precipitation and segregation through the control of SPD processing regimes.

Язык оригиналаанглийский
Страницы (с-по)19-32
ЖурналActa Materialia
Том162
Ранняя дата в режиме онлайн28 сен 2018
DOI
СостояниеОпубликовано - янв 2019

Предметные области Scopus

  • Электроника, оптика и магнитные материалы
  • Керамика и композитные материалы
  • Пластик и полимеры
  • Металлы и сплавы

Fingerprint Подробные сведения о темах исследования «Dynamic precipitation, segregation and strengthening of an Al-Zn-Mg-Cu alloy (AA7075) processed by high-pressure torsion». Вместе они формируют уникальный семантический отпечаток (fingerprint).

Цитировать