Contrasting thermal behaviors in Σ3 grain boundary motion in nickel
Contrasting thermal behaviors in Σ3 grain boundary motion in nickel
复制标题
镍中 Σ3 晶界运动的热行为对比
DOI:
10.1016/j.actamat.2019.06.003
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发表时间:
2019
期刊:
影响因子:
9.4
通讯作者:
Holm, Elizabeth A.
中科院分区:
文献类型:
--
作者:
Humberson, Jonathan;Chesser, Ian;Holm, Elizabeth A.
Synthetic driving force molecular dynamics simulations were utilized to survey grain boundary mobility in three classes of incoherent Σ3 twin boundaries: <112>, <110>, and <111> tilt boundaries. These boundaries are faceted on low energy planes, and step flow boundary motion occurs by glide of the triplets of partial dislocations that comprise the mobile facets. Systematic trends with inclination angle are identified and characterized. Observations of thermally activated, anti-thermal, and athermal motion are explained in terms of the orientation of the Shockley partial dislocations along close-packed and non-close-packed directions. Thermally activated <112> tilt boundaries with {110} twin facets are found to have smaller energy barriers to motion than <110> tilt boundaries with {112} twin facets. Thermally activated boundaries follow a compensation effect associated with a facet roughening transition. As for all faceting boundaries, system size and driving force must be chosen with care to prevent simulation artifacts.
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DOI:
10.1016/0036-9748(78)90189-8
发表时间:
1978-01-01
期刊:
SCRIPTA METALLURGICA
影响因子:
--
作者:
KOPETSKY, CV;SHVINDLERMAN, LS;SURSAEVA, VG
通讯作者:
SURSAEVA, VG
影响因子:
1.6
作者:
Gunther Schoeck §;M. Krystian
通讯作者:
Gunther Schoeck §;M. Krystian
DOI:
10.1016/0001-6160(89)90138-7
发表时间:
1989-08-01
期刊:
ACTA METALLURGICA
影响因子:
--
作者:
HSIEH, TE;BALLUFFI, RW
通讯作者:
BALLUFFI, RW
影响因子:
9.4
作者:
D. Medlin;S. Foiles;D. Cohen
通讯作者:
D. Cohen
影响因子:
3.7
作者:
Hadian, R.;Grabowski, B.;Neugebauer, J.
通讯作者:
Neugebauer, J.