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 изданияхстатьянаучнаярецензирование

8 Цитирования (Scopus)

Выдержка

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
Число страниц14
ЖурналActa Materialia
Том162
DOI
СостояниеОпубликовано - 1 янв 2019

Предметные области Scopus

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

Цитировать

Zhang, Yidong ; Jin, Shenbao ; Trimby, Patrick W. ; Liao, Xiaozhou ; Murashkin, Maxim Y. ; Valiev, Ruslan Z. ; Liu, Jizi ; Cairney, Julie M. ; Ringer, Simon P. ; Sha, Gang. / Dynamic precipitation, segregation and strengthening of an Al-Zn-Mg-Cu alloy (AA7075) processed by high-pressure torsion. В: Acta Materialia. 2019 ; Том 162. стр. 19-32.
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abstract = "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.",
keywords = "Al-Zn-Mg-Cu alloy, Dynamic precipitation, High-pressure torsion, Segregation, Strengthening",
author = "Yidong Zhang and Shenbao Jin and Trimby, {Patrick W.} and Xiaozhou Liao and Murashkin, {Maxim Y.} and Valiev, {Ruslan Z.} and Jizi Liu and Cairney, {Julie M.} and Ringer, {Simon P.} and Gang Sha",
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Dynamic precipitation, segregation and strengthening of an Al-Zn-Mg-Cu alloy (AA7075) processed by high-pressure torsion. / Zhang, Yidong; Jin, Shenbao; Trimby, Patrick W.; Liao, Xiaozhou; Murashkin, Maxim Y.; Valiev, Ruslan Z.; Liu, Jizi; Cairney, Julie M.; Ringer, Simon P.; Sha, Gang.

В: Acta Materialia, Том 162, 01.01.2019, стр. 19-32.

Результат исследований: Научные публикации в периодических изданияхстатьянаучнаярецензирование

TY - JOUR

T1 - Dynamic precipitation, segregation and strengthening of an Al-Zn-Mg-Cu alloy (AA7075) processed by high-pressure torsion

AU - Zhang, Yidong

AU - Jin, Shenbao

AU - Trimby, Patrick W.

AU - Liao, Xiaozhou

AU - Murashkin, Maxim Y.

AU - Valiev, Ruslan Z.

AU - Liu, Jizi

AU - Cairney, Julie M.

AU - Ringer, Simon P.

AU - Sha, Gang

PY - 2019/1/1

Y1 - 2019/1/1

N2 - 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.

AB - 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.

KW - Al-Zn-Mg-Cu alloy

KW - Dynamic precipitation

KW - High-pressure torsion

KW - Segregation

KW - Strengthening

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U2 - 10.1016/j.actamat.2018.09.060

DO - 10.1016/j.actamat.2018.09.060

M3 - Article

VL - 162

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EP - 32

JO - Acta Materialia

JF - Acta Materialia

SN - 1359-6454

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