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Deformation~ Features Of AZ31 Mg--Alloy In Initial Period Of High Temperature Creep |
TIAN Sugui; YANG Jinghong; YU Xingfu;SOHN Keunyong; KIM Kyunghyun;XU Yongbo; HU Zhuangqi |
Department of Materials Science and Engineering; Shenyang University of Technology; Shenyang 110023 |
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Cite this article:
TIAN Sugui; YANG Jinghong; YU Xingfu; SOHN Keunyong; KIM Kyunghyun; XU Yongbo; HU Zhuangqi. Deformation~ Features Of AZ31 Mg--Alloy In Initial Period Of High Temperature Creep. Acta Metall Sin, 2005, 41(4): 375-379 .
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Abstract By means of the measurement of the creep curve and the observation of
TEM, an investigation has been made into the deformation feature and
microstructure evolution of AZ31 Mg--alloy in the initial creep at
elevated temperature. The results show that the deformation feature
during creep produced in the primary stage is that a great deal
of $\langle a\rangle$ dislocation is activated on basal and non--basal
planes, and $\langle a+c\rangle$ dislocation slips on pyramidal planes.
$\langle a\rangle$ dislocation generated during creep may cross--slip
from one of non--basal plane to another non--basal planes. As creep goes
on, the dynamic recovery (DRV) may occur, and the dislocations
are concentrated to form the dislocation cells or walls. Another feature
observed during creep is that twinning occurs as an important deformation
mechanism, leading to improvement of the alloy ductility.
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Received: 26 May 2004
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