增材制造的Inconel 625高温合金中的析出物。

Precipitates in Additively Manufactured Inconel 625 Superalloy.

作者信息

Dubiel Beata, Sieniawski Jan

机构信息

Faculty of Metals Engineering and Industrial Computer Science, AGH University of Science and Technology, Al. Mickiewicza 30, 30-059 Kraków, Poland.

Faculty of Mechanical Engineering and Aeronautics, Rzeszów University of Technology, 2 Wincentego Pola St., 35-959 Rzeszów, Poland.

出版信息

Materials (Basel). 2019 Apr 8;12(7):1144. doi: 10.3390/ma12071144.

DOI:10.3390/ma12071144

PMID:30965638

原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC6480167/

Abstract

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 MC₆ carbides as well as the Laves phase.

摘要

基于激光的增材制造工艺越来越多地用于制造由镍基高温合金制成的部件。微观结构的演变，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至关重要。本文总结了使用基于激光的粉末床熔融和定向能量沉积工艺制造的Inconel 625高温合金微观结构的文献数据，特别强调了析出相的相鉴定。通过光学显微镜和透射电子显微镜研究了基于激光的定向能量沉积制造的Inconel 625在原始状态下的微观结构。通过选区电子衍射和化学成分微分析相结合的方法对析出相进行相分析。在原始状态的Inconel 625的枝晶间区域中存在的析出相被鉴定为MC和MC₆碳化物以及Laves相。