Abstract

New methods to monitor metal burning in D16 and V95 aluminum alloys based on using energy-dispersive X-ray spectral analysis (EDS analysis) are shown. It is known that the reduced properties of aluminum-based materials are often associated with the presence of metal burning in the structure. The structural changes caused by metal burning (partial melting of eutectics and excessive low-melting phases with the subsequent crystallization of molten microvolumes) are often accompanied by the development of porosity and negatively affect the physicochemical, mechanical, and manufacturing properties. The ability to reveal metal burning at early stages makes it possible to reject the defective metal. The characteristics sensitive to the early metal-burning stage are proposed based on the EDS analysis. The induced metal-burning degree in a sheet of the D16 alloy is identified. The structural components of the V95 alloy determining the alloy liability to metal burning are established. It is shown that the EDS analysis makes it possible to reveal the variations in the chemical composition of structural elements of the D16 and V95 aluminum alloys, as well as quantitatively identify the metal-burning stage by the oxygen content. The metal-burning development leads not only to an increase in the oxygen content in the chemical composition of aluminum alloys, but also to a decrease in the electrical conductivity of the material. The correlation between the electrical conductivity of the D16 alloy with induced metal burning and oxygen content is considered. The applicability of the EDS analysis is due to the simplicity of the procedure and the possibility of quantitatively evaluating the development of defects in heat-strengthened deformed aluminum alloys after manufacturing heating. It can be used as an additional method for investigation when metallographic analysis gives an ambiguous answer when revealing early metal-burning stages.

中文翻译：

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D16和V95变形铝合金的相组成以及在不同开发阶段对金属燃烧的定量评估

摘要

显示了使用能量色散X射线光谱分析（EDS分析）监测D16和V95铝合金中金属燃烧的新方法。已知铝基材料的性能降低通常与结构中金属燃烧的存在有关。金属燃烧引起的结构变化（共熔物的部分熔化和过多的低熔点相以及随后熔化的微体积的结晶）通常伴随着孔隙率的发展，并对物理化学，机械和制造性能产生负面影响。早期发现金属燃烧的能力使得可以剔除有缺陷的金属。基于EDS分析，提出了对金属早期燃烧敏感的特性。确定在D16合金薄板中引起的金属燃烧程度。确定了V95合金的决定金属燃烧的合金成分。结果表明，EDS分析可以揭示D16和V95铝合金的结构元素的化学组成变化，并可以通过氧含量定量确定金属燃烧阶段。金属燃烧的发展不仅导致铝合金化学成分中的氧含量增加，而且导致材料的电导率降低。考虑了D16合金的电导率与诱导的金属燃烧和氧含量之间的相关性。EDS分析的适用性是由于该过程的简单性以及在制造加热后定量评估热强化变形铝合金中缺陷发展的可能性。当金相分析在揭示早期的金属燃烧阶段时给出了模棱两可的答案时，它可以用作调查的附加方法。