摘要
通过Ｘ射线衍射及ＴＥＭ研究了Ａｌ－１２．７ａｔ％Ｌｉ合金时效早期的相交，发现固溶处理状态试样的Ｘ射线衍射谱的（２００）主峰两边存在边带现象，证实了该合金相分解早期阶段存在调幅分解，且伴随着有序化和δ＇（Ａｌ３Ｌｉ）相的析出。
This paper deals with phase transformation in the early stage of ageing in Al-12. 6 at% Li alloy. It is found that there is a side-band around (200) main peak in X-ray diffraction pattern of the solution-treated specimen. It concludes that the phase separation of Al-Li alloys can occur by spinodal decomposition mechanism, and congruent ordering of solute atoms and precipitation ofδ'(Al3Li)phase.take place simultaneously.
基金
国家自然基金
关键词
铝锂合金
调幅分解
有序化
X射线衍射
Al-Li alloy
spinodal decomposition
ordering
X-ray diffraction
