Precipitates in Additively Manufactured Inconel 625 Superalloy
Precipitates in Additively Manufactured Inconel 625 Superalloy
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DOI：
10.3390/ma12071144
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发表时间：
2019-04-10
期刊：
影响因子：
3.4
通讯作者：
Sieniawski, Jan
中科院分区：
文献类型：
--
作者：
Dubiel, Beata;Sieniawski, Jan
基于激光的增材制造工艺越来越多地用于制造由镍基超合金制成的部件。微观结构的发展，特别是第二相的析出，对于增材制造的镍基高温合金的性能非常重要。本文总结了文献数据的显微组织的Inconel 625高温合金制造的激光粉末床融合和定向能量沉积工艺，特别强调的相识别的沉淀物。利用光学显微镜和透射电子显微镜研究了Inconel 625合金激光定向能量沉积成形后的显微组织。沉淀物的物相分析采用选区电子衍射和微量化学成分分析相结合的方法。在Inconel 625的枝晶间区域中存在的碳化物被确定为MC和M23C6碳化物以及Laves相。
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.