article.page.titleprefix A comprehensive characterization of the effect of spatter powder on IN939 parts fabricated by laser powder bed fusion
Date
2023-10-15
Journal Title
Journal ISSN
Volume Title
Publisher
Materials and Design
Abstract
This study is focused on a comprehensive characterization of virgin and spatter IN939 powders and the effects of a certain amount of spatter powder on the part quality of IN939 fabricated by the L-PBF process. A brown tint coloration formed Al2O3 oxide, pores, a 124.4% increase in the average particle size, a 10.2% decrease in the powder circularity, and a 7.5% decrease in the powder aspect ratio were observed in the spatter powder. Additionally, higher average grain size and lower nanohardness were obtained for the spatter powder. In order to understand the effect of a certain amount of spatter powder on the part quality, 10 wt.% spatter powder was mixed with the virgin powder. This addition was found to decrease the flowability of the powder. Moreover, this addition decreased relative density by around 0.3% and increased surface roughness by around 80.8% in the fabricated samples (termed as V and SV). On the other hand, there was no considerable microstructural, texture, microhardness, and nanohardness difference between V and SV samples, although the spatter powder addition caused a 30.2% increase in the average grain size of SV. The overall texture for both V and SV samples exhibit (001)//BD.
Description
Open Access, Published by Materials & Design, https://doi.org/10.1016/j.matdes.2023.112406, Merve Nur Doğu, Andre Mussatto, Dermot Brabazon, Form, the SFI Research Centre for Advanced Manufacturing, Dublin City University, Dublin, Ireland, School of Mechanical & Manufacturing Engineering, Dublin City University, Dublin, Ireland, Advanced Processing Technology Research Centre, Dublin City University, Dublin, Ireland, Mustafa Alp Yalçın, Metal Forming Center of Excellence, Atılım University, Ankara, Turkey, Seren Ozer, Department of Metallurgical and Materials Engineering, Atılım University, Ankara, Turkey, Department of Metallurgical and Materials Engineering, Middle East Technical University, Ankara, Turkey, Kemal Davut, Department of Materials Science and Engineering, Izmir Institute of Technology, 35430, Urla, Izmir, Turkey, Ajay Kumar, Sarah Hudson, SSPC the Science Foundation Ireland Research Centre for Pharmaceutics, University of Limerick, Limerick,Ireland, Darragh O'Neill, Robert O'Connor, I-Form, the SFI Research Centre for Advanced Manufacturing, Dublin City University, Dublin, Ireland, Advanced Processing Technology Research Centre, Dublin City University, Dublin, Ireland, School of Physical Sciences, Dublin City University, Glasnevin, Dublin 9, Ireland, Hengfeng Gu, Ansys Inc., 6975 Union Park Avenue, Suite 663, Cottonwood Heights, UT 84047, USA, Corresponding author Merve Nur Doğu: mervenur.dogu@dcu.ie
Keywords
Laser powder bed fusion; IN939; spatter powder; powder recycling; electron
backscatter diffraction; microstructure
Citation
http://hdl.handle.net/20.500.14411/1894