期刊
出版社
ELSEVIER SCIENCE SA
DOI: 10.1016/j.msea.2021.141972
关键词
Additive manufacturing; Electron microscopy; Nickel alloys; Laser methods; IN 718
类别
资金
- Council for Science, Technology and Innovation (CSTI), Cross-ministerial Strategic Innovation Promotion Program (SIP), 'Materials Integration for Revolutionary Design System of Structural Materials' (JST)
In this study, three dimensional parts of Inconel 718 superalloy were fabricated using L-PBF additive manufacturing. Tensile tests and microstructure characterization were conducted to compare the mechanical properties of AM IN 718 and W IN 718, showing a marginal increase in yield strength for AM IN 718.
In the present study, three dimensional parts of Inconel 718 (R) (IN 718) superalloy were fabricated using laser powder bed fusion (L-PBF) additive manufacturing (AM). The soundness of the as-built parts was checked by measuring the relative density using Archimedes method. Tensile tests were carried out at the strain rate of 4.6 x 10(-3) s(-1) at ambient temperature on cylindrical samples extracted from the large size 3D blocks of AM IN 718. Tensile tests were also carried out employing the same test parameters on the wrought counterpart of IN 718 (W IN 718) so as to compare their mechanical properties. The AM IN 718 exhibited about 15% increase in 0.2% yield strength (0.2%YS) as compared to W IN 718. Microstructures of AM IN 718 and W IN 718 were characterized using electron back scattered diffraction. The dislocation substructure of pre-deformed samples was examined using transmission electron microscope (TEM). Bright field TEM images revealed nano-sized precipitates in AM IN 718 and carbides in W IN 718. The marginal increase in 0.2%YS in AM IN 718 is attributed to the impediment to dislocation movements by nano-sized precipitates and high initial dislocation density.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据