Dynamics and mechanism of columnar grain growth of pure iron under directional annealing
Dynamics and mechanism of columnar grain growth of pure iron under directional annealing
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纯铁定向退火柱状晶长大动力学及机理
DOI:
10.1016/j.actamat.2007.07.019
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发表时间:
2007-10
期刊:
影响因子:
9.4
通讯作者:
中科院分区:
文献类型:
--
作者:
The dynamics and mechanism of columnar grain growth of pure iron with small equiaxed grains were experimentally investigated under directional annealing. The results prove the existence of both a lower- and an upper limit of the withdrawing velocity for columnar grain growth. Importantly, there is an optimum withdrawing velocity at which the largest aspect ratio of columnar grains can be obtained. A kinetic approach is suggested to describe the growth of the columnar grains. The aspect ratio of the columnar grains can be successfully predicted by this approach. The mechanism of the columnar grain growth essentially can be described as selective growth or competitive migration of the grain boundaries. As a result of selective growth, the boundaries between the columnar grains abound in low-energy boundaries. Small island-like grains inside the columnars grain can be left over due to the low mobility of their small-angle boundaries or twin boundaries.
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影响因子:
1.8
作者:
M. Miodownik;J. Martin;E. Little
通讯作者:
M. Miodownik;J. Martin;E. Little
DOI:
10.1098/rspa.1937.0206
发表时间:
1937-11
期刊:
--
影响因子:
--
作者:
E. Andrade
通讯作者:
E. Andrade
影响因子:
6
作者:
A. Morawiec
通讯作者:
A. Morawiec
DOI:
10.4028/www.scientific.net/msf.467-470.917
发表时间:
2004-05
期刊:
Materials Science Forum
影响因子:
--
作者:
H. Park;Young‐Chang Joo;Doh-Yeon Kim;Jong Tae Park;Jae Kwan Kim;N. Hwang
通讯作者:
H. Park;Young‐Chang Joo;Doh-Yeon Kim;Jong Tae Park;Jae Kwan Kim;N. Hwang
影响因子:
1.6
作者:
A. Godfrey;John W. Martin
通讯作者:
A. Godfrey;John W. Martin