Analysis of precipitate density of an aluminium alloy by TEM and AFM
Analysis of precipitate density of an aluminium alloy by TEM and AFM
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用 TEM 和 AFM 分析铝合金的析出物密度
DOI：
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发表时间：
2016
期刊：
影响因子：
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通讯作者：
A. Carvalho
中科院分区：
文献类型：
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作者：
S. C. Jacumasso;J. P. Martins;A. Carvalho
采用一系列实验技术对Al-Zn-Mg-Cu合金中的纳米析出相进行了定量分析。特别是在AA 7050合金中，在时效热处理之后，负责硬化的颗粒变得非常薄。通常，这些纳米尺寸的沉淀物主要通过透射电子显微镜（TEM）表征，在这种特定情况下，需要非常细致的制备。本研究探讨了一种可能的替代量化的沉淀物，原子力显微镜（AFM），以补充TEM的技术。为此，选择了三种时效铝合金AA 7050的热处理条件，以产生不同密度和尺寸的沉淀物。实验结果表明，原子力显微镜技术被证明是一个有效的定性工具，并可以补充所获得的结果，透射电子显微镜的微观结构的探索性分析。
The quantification of nanometric precipitates in Al-Zn-Mg-Cu alloys has been performed by a series of experimental techniques. Especially in the AA7050 alloy, after ageing heat treatment, the particles responsible for the hardening become very thin. Typically, these precipitates of nanometric sizes are mainly characterized by transmission electron microscopy (TEM), which in this particular case, requires a very meticulous preparation. This study investigated a possible alternative quantification of the precipitates by atomic force microscopy (AFM) to complement the technique by TEM. For this, three conditions for heat treatment of an aged aluminium alloy AA7050 were therefore chosen to produce different density and sizes of precipitates. The experimental results showed that the AFM technique proved to be a valid qualitative tool and may complement the results obtained by TEM an exploratory analysis for the microstructures.