Characterization and interpretation of the morphology of a Mg2Sn precipitate with irrational facets in a Mg–Sn–Mn alloy
Characterization and interpretation of the morphology of a Mg2Sn precipitate with irrational facets in a Mg–Sn–Mn alloy
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DOI：
10.1080/14786435.2011.640294
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发表时间：
2012-03
影响因子：
1.6
通讯作者：
Z.-Z. Shi-Z.;W. Zhang;X. Gu
中科院分区：
文献类型：
--
作者：
Z.-Z. Shi-Z.;W. Zhang;X. Gu
利用透射电子显微镜（TEM）研究了Mg-Sn-Mn合金中β-Mg 2Sn析出相相对于α-Mg基体呈（近）Burgers取向关系（OR）时的晶体学形貌。沉淀物的两个无理面被发现是F1 <$//（−1 1 0.74）β和F2 <$//（−1 1 −3.1）β。根据界面结构来解释小平面。F1中奇异位错结构的存在需要从Burgers OR旋转0.21°。计算的形态与观察结果一致。
The crystallographic morphology of β-Mg2Sn precipitates at (near) Burgers orientation relationship (OR) with respect to the α-Mg matrix in a Mg–Sn–Mn alloy was investigated by transmission electron microscopy (TEM). Two irrational facets of the precipitates were found to be F1 ∼// (−1 1 0.74)β and F2 ∼// (−1 1 −3.1)β. The facets are interpreted according to interfacial structures. The presence of a singular dislocation structure in F1 requires a small rotation of 0.21° from the Burgers OR. The calculated morphology is consistent with the observations.