摘要
Laser-based additive manufacturing processes are increasingly used for fabricating components made of nickel-based superalloys. The microstructure development, and in particular the precipitation of secondary phases, is of great importance for the properties of additively manufactured nickel-based superalloys. This paper summarizes the literature data on the microstructure of Inconel 625 superalloy manufactured using laser-based powder-bed fusion and directed energy deposition processes, with particular emphasis on the phase identification of precipitates. The microstructure of Inconel 625 manufactured by laser-based directed energy deposition in as-built condition is investigated by means of light microscopy and transmission electron microscopy. Phase analysis of precipitates is performed by the combination of selected area electron diffraction and microanalysis of chemical composition. Precipitates present in the interdendritic areas of as-built Inconel 625 are identified as MC and M23C6 carbides as well as the Laves phase.
摘要译文
基于激光的添加剂制造工艺越来越多地用于制造由镍基超合金制成的部件。微观结构显影，特别是次阶的沉淀，对于含有含有镍基超合金的性质来说非常重要。本文总结了使用基于激光基粉状融合和定向能量沉积工艺制造的Inconel 625超合金的微观结构的文献数据，特别强调沉淀物的相位鉴定。通过光学显微镜和透射电子显微镜研究了由激光的基于激光的定向能量沉积制造的Inconel 625的微观结构。沉淀物的相分析通过化学组合物的选定区域电子衍射和微分分析的组合来进行。存在于嵌入的Inconel 625的植物间区域中存在的沉淀物被鉴定为MC和M23C6碳化物以及Laves阶段。
Beata Dubiel[ 1;[*];Jan Sieniawski[ 2]. Precipitates in Additively Manufactured Inconel 625 Superalloy[J]. Materials, 2019,12(7): 1144