Tsaknopoulos Kyle, Walde Caitlin, Tsaknopoulos Derek, Champagne Victor, Cote Danielle
Material Science and Engineering Program, Department of Mechanical Engineering, Worcester Polytechnic Institute, 100 Institute Road, Worcester, MA 01609, USA.
US Army Research Laboratory, Aberdeen Proving Ground, MD 21005-5069, USA.
Materials (Basel). 2020 Sep 12;13(18):4051. doi: 10.3390/ma13184051.
Aluminum 5056 is a work-hardenable alloy known for its corrosion resistance with new applications in additive manufacturing. A good understanding of the secondary phases in Al 5056 powders is important for understanding the properties of the final parts. In this study, the effects of different thermal treatments on the microstructure of Al 5056 powder were studied. Thermodynamic models were used to guide the interpretation of the microstructure as a function of thermal treatment, providing insight into the stability of different possible phases present in the alloy. Through the use of transmission electron microscopy (TEM) and energy-dispersive X-ray spectroscopy (EDS), combined with thermodynamic modeling, a greater understanding of the internal microstructure of Al 5056 powder has been achieved in both the as-atomized and thermally treated conditions. Evidence of natural aging within these powders was observed, which speaks to the shelf-life of these powders and the importance of proper treatment and storage to maintain consistent results.
5056铝合金是一种可加工硬化的合金，以其耐腐蚀性而闻名，在增材制造中有新的应用。深入了解5056铝合金粉末中的第二相对于理解最终零件的性能至关重要。在本研究中，研究了不同热处理对5056铝合金粉末微观结构的影响。热力学模型被用于指导对微观结构随热处理变化的解释，从而深入了解合金中不同可能相的稳定性。通过使用透射电子显微镜（TEM）和能量色散X射线光谱（EDS），并结合热力学建模，在雾化态和热处理条件下都对5056铝合金粉末的内部微观结构有了更深入的了解。观察到这些粉末中有自然时效的迹象，这说明了这些粉末的保质期以及适当处理和储存以保持一致结果的重要性。
