Deformation defects and electron irradiation effect in nanostructured Al-Mg alloy processed by severe plastic deformation

被引：10

作者：

Liu Man-ping ^{[1
,2
]}

Sun Shao-chun ^{[1
]}

Roven, Hans J. ^{[2
]}

Yu Ying-da ^{[2
]}

Zhang Zhen ^{[1
]}

Murashkin, Maxim ^{[3
]}

Valiev, Ruslan Z. ^{[3
]}

机构：

[1] Jiangsu Univ, Sch Mat Sci & Engn, Zhenjiang 212013, Peoples R China

[2] Norwegian Univ Sci & Technol NTNU, Dept Mat Sci & Engn, NO-7491 Trondheim, Norway

[3] Ufa State Aviat Tech Univ, Inst Phys Adv Mat, Ufa 450000, Russia

来源：

TRANSACTIONS OF NONFERROUS METALS SOCIETY OF CHINA | 2012年 / 22卷 / 08期

基金：

中国国家自然科学基金;

关键词：

Al-Mg alloy; severe plastic deformation; high pressure torsion; electron irradiation; deformation defects; transmission electron microscopy; NANOCRYSTALLINE AL; RADIATION-DAMAGE; ALUMINUM; MICROSCOPY; METALS; TWINS;

D O I：

10.1016/S1003-6326(11)61391-5

中图分类号：

TF [冶金工业];

学科分类号：

0806 ;

摘要：

In order to explore the exact nature of deformation defects previously observed in nanostructured Al-Mg alloys subjected to severe plastic deformation, a more thorough examination of the radiation effect on the formation of the planar defects in the high pressure torsion (HPT) alloys was conducted using high-resolution transmission electron microscopy (HRTEM). The results show that high density defects in the HRTEM images disappear completely when these images are exposed under the electron beam for some duration of time. At the same time, lattice defects are never observed within no-defect areas even when the beam-exposure increases to the degree that holes appear in the areas. Therefore, it is confirmed that the planar defects observed in the HPT alloys mainly result from the significant plastic deformation and are not due to the radiation effect during HRTEM observation.

引用

页码：1810 / 1816

页数：7

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