HRTEM study of the {252}γ austenite-martensite interface in an Fe - 8Cr-1C alloy
HRTEM study of the {252}γ austenite-martensite interface in an Fe - 8Cr-1C alloy
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Fe - 8Cr-1C 合金中 {252}γ 奥氏体-马氏体界面的 HRTEM 研究
DOI：
10.1080/09500838908206355
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发表时间：
1989
影响因子：
1.2
通讯作者：
S. Mahajan
中科院分区：
文献类型：
--
作者：
G. Mahon;J. Howe;S. Mahajan
摘要采用高分辨率透射电子显微镜对(2S2)γ奥氏体-马氏体界面的原子结构进行了成像。通过沿[101]γ∥[111]α进行成像，可以看到界面是侧面的，并且可以看到由紧密排列的(111)γ平面上的面组成。根据奥氏体-马氏体界面上密排面的原子对应关系，在投影平面上每个密排面的剪切强度可分析为（a/24）。与理论比较表明，这是投影平面外的（a/12）伯格向量。因此，每个原子面可被视为包含（a/12）相变位错的构造壁架。
Abstract High-resolution transmission electron microscopy has been used to image the atomic structure of the (2S2)γ austenite-martensite interface. By imaging along [101]γ ∥[111]α, the interface was viewed edge-on and seen to consist of facets on the close-packed (111)γ, planes. From the correspondence of atoms in the close-packed planes across the austenite-martensite interface, the magnitude of the shear can be analysed as (a/24) on every close-packed plane in the plane of projection. Comparison with theory indicates that this is an (a/12) Burgers vector out of the plane of projection. Hence, each atomic facet can be viewed as a structural ledge containing an (a/12) transformation dislocation.