快速凝固Al-Li-Cu-Mg-Zr合金中Z相和T相的结构关系

金属学报, 1993, 29(8): 10-14.

快速凝固Al-Li-Cu-Mg-Zr合金中Z相和T相的结构关系

张立春 , 何安强 , 吴玉琨 , 叶恒强 , 张永昌

中国科学院金属研究所固体原子象开放实验室

中国科学院金属研究所

关键词： Al-Li-Cu-Mg-Zr合金 , Z hexagonal phase , T f.c.c. phase , shear structure

STRUCTURAL RELATIONSHIP BETWEEN Z AND T PHASES IN RAPIDLY SOLIDIFIED Al-Li-Cu-Mg-Zr ALLOY

ZHANG Lichun , HE Anqiang , WU Yukun , YE Hengqiang , ZHANG Yongchang Laboratory of Atomic Imaging of Soids

Keywords： Al-Li-Cu-Mg-Zr alloy , 六角Z相 , 面心T相 , 剪切结构

利用高分辨电镜(HRTEM)和常规电子显微术研究了快速凝固Al-Li-Cu—Mg—Zr合金中Z相和T相的结构关系,发现两相间两种确定的晶体学取向关系,并以此为依据解释了Z相和T相的某些结构缺陷两相的结构有密切关联,其中一相中缺陷的扩展会导致另一相的形成

Structural relationship between Z and T phases in a rapidly solidifiedAl-Li-Cu-Mg-Zr alloy has been studied by high-resolution electron microscopy andconventional tramission electron microscopy. The result shows that there exist two well de-fined orientation relationships between Z and T phases. The observed structural faults in Zand T phases could be interpreted. The structrues of the two phases is closely related to eachother, certain faulted structures in one phase can be seen as the other phase when the faultedarea is extended.

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