Abstract
| Original language | English |
|---|---|
| Pages (from-to) | 239 - 247 |
| Number of pages | 9 |
| Journal | Acta Materialia |
| Volume | 83 |
| DOIs | |
| Publication status | Published - 2015 |
Cite this
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Linear-chain configuration of precipitates in Mg-Nd alloys. / Zhu, Y.M.; Liu, H.; Xu, Z.; Wang, Y.; Nie, J.F.
In: Acta Materialia, Vol. 83, 2015, p. 239 - 247.Research output: Contribution to journal › Article › Research › peer-review
TY - JOUR
T1 - Linear-chain configuration of precipitates in Mg-Nd alloys
AU - Zhu, Y.M.
AU - Liu, H.
AU - Xu, Z.
AU - Wang, Y.
AU - Nie, J.F.
PY - 2015
Y1 - 2015
N2 - The linear-chain distribution of precipitates, resembling the characteristic features of bamboo, in a Mg–3 wt.% Nd alloy, aged at 250 C for 10 h, has been examined using high-angle annular dark-field scanning transmission electron microscopy. The configuration consists of bamboo trunks of b1 variants and trunk connections of a hitherto unreported phase designated b2 in this work. The b2 phase has a hexagonal lattice (space group P6, a = 0.523 nm and c = 0.963 nm), and its orientation relationship with the Mg matrix phase is such that h1120ib2 //[0001]a and f1 1 0 0gb2 //f1100ga. The b2 phase is metastable, but it is induced to form and is stabilized by the stress fields of the two adjacent b1 particles. The b2 particle either has a substructure of ð0 0 0 1Þb2 planar faults, or is free of the planar faults, depending on whether the two b1 precipitates connecting it are of the same variant or not. A minor fraction of bamboos also have leaf-like b1 particles attached to the connection point of the bamboo trunks. The formation of the leaf-like particles is analyzed by nteraction energy calculation and phase-field simulation.
AB - The linear-chain distribution of precipitates, resembling the characteristic features of bamboo, in a Mg–3 wt.% Nd alloy, aged at 250 C for 10 h, has been examined using high-angle annular dark-field scanning transmission electron microscopy. The configuration consists of bamboo trunks of b1 variants and trunk connections of a hitherto unreported phase designated b2 in this work. The b2 phase has a hexagonal lattice (space group P6, a = 0.523 nm and c = 0.963 nm), and its orientation relationship with the Mg matrix phase is such that h1120ib2 //[0001]a and f1 1 0 0gb2 //f1100ga. The b2 phase is metastable, but it is induced to form and is stabilized by the stress fields of the two adjacent b1 particles. The b2 particle either has a substructure of ð0 0 0 1Þb2 planar faults, or is free of the planar faults, depending on whether the two b1 precipitates connecting it are of the same variant or not. A minor fraction of bamboos also have leaf-like b1 particles attached to the connection point of the bamboo trunks. The formation of the leaf-like particles is analyzed by nteraction energy calculation and phase-field simulation.
UR - http://goo.gl/UKdgDj
U2 - 10.1016/j.actamat.2014.09.037
DO - 10.1016/j.actamat.2014.09.037
M3 - Article
VL - 83
SP - 239
EP - 247
JO - Acta Materialia
JF - Acta Materialia
SN - 1359-6454
ER -