T 1 (Al2CuLi) Precipitation in Aluminium–Copper–Lithium Alloys
T 1 (Al2CuLi) Precipitation in Aluminium–Copper–Lithium Alloys
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DOI：
10.1179/030634572790445975
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发表时间：
1972-01
期刊：
影响因子：
--
通讯作者：
B. Noble;G. Thompson
中科院分区：
文献类型：
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作者：
B. Noble;G. Thompson
用电子显微镜研究了含（wt.-%） Cu 3.5, Li 1.5和Cu 2.5, Li 2.0铝合金中t1析出现象。t1相形成极薄的六边形板，具有{111}习惯面，并且根据过饱和程度，在GP带或通过堆叠-断层机制在解离位错处成核。析出相以1/6肖克利部分位错为界，这些部分位错的分离使相长大。
T 1 precipitation has been studied by electron microscopy in aluminium alloys containing (wt.-%) Cu 3.5, Li 1.5 and Cu 2.5, Li 2.0. The T 1 phase forms as extremely thin hexagonal-shaped plates with a {111} habit plane and, depending on the degree of super-saturation, nucleates either at GP zones or at dissociated dislocations by a stacking-fault mechanism. The precipitate is bounded by 1/6 Shockley partial dislocations and growth of the phase occurs by separation of these partial dislocations.