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首页> 外文期刊>Revista de metalurgia >Estructuras ordenadas L10 en aleaciones Al-Cu-(Mg) en los estados iniciales de envejecimiento a temperaturas elevadas
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Estructuras ordenadas L10 en aleaciones Al-Cu-(Mg) en los estados iniciales de envejecimiento a temperaturas elevadas

机译：高温时效初期的Al-Cu-（Mg）合金中的L10有序结构

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This study concerns the precipitation structures of Al-3Cu and Al-3Cu-1.78Mg (wt. %) alloys at the early stages of elevated temperature aging. The Al-3Cu and Al-3Cu-1.78 Mg alloys were solution treated at 540 °C and 500 °C for 2 h, respectively, and then aged at 190 °C for 2 min. The precipitation structures in aged Al-3Cu-(1.78Mg) alloys were characterized by Transmission Electron Microscopy (TEM) and High Resolution Transmission Electron Microscopy (HTREM). 001 zone axis Selected area electron diffraction patterns indicate that L10 ordered structures are formed in the two aged alloys. HRTEM experiments reveal the partial dislocations on the interfaces of L10 ordered structures. From comparing experimental results with that in the literature, it is concluded that the L10 ordered structures in aged Al-3Cu alloy consist of Al and Cu atoms, and they are comprised by Al, Cu and Mg atoms together in the aged Al-3Cu-1.78Mg alloy. On the basis of precipitate growing thermodynamics, it is thought the L10 ordered structures act as nuclei for GP zones in Al-Cu-(Mg) alloys during aging.
机译：这项研究涉及高温时效早期的Al-3Cu和Al-3Cu-1.78Mg（wt。％）合金的析出结构。将Al-3Cu和Al-3Cu-1.78 Mg合金分别在540°C和500°C固溶处理2 h，然后在190°C时效2分钟。采用透射电子显微镜（TEM）和高分辨率透射电子显微镜（HTREM）对时效Al-3Cu-（1.78Mg）合金的析出结构进行了表征。 001区轴选定区域的电子衍射图谱表明，在两种时效合金中形成了L10有序结构。 HRTEM实验揭示了L10有序结构界面上的部分位错。通过与实验结果的比较，可以得出结论，在时效的Al-3Cu合金中，L10有序结构由Al和Cu原子组成，并且在时效的Al-3Cu-合金中由Al，Cu和Mg原子共同构成。 1.78Mg合金。根据沉淀物生长的热力学，认为在时效过程中，L10有序结构在Al-Cu-（Mg）合金中充当GP区的核。

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