NDLI: Balling behavior of stainless steel and nickel powder during selective laser melting process

Content Provider	Springer Nature Link
Author	Li, Ruidi Liu, Jinhui Shi, Yusheng Wang, Li Jiang, Wei
Copyright Year	2011
Abstract	Balling phenomenon, as a typical selective laser melting (SLM) defect, is detrimental to the forming quality. In this work, a detailed investigation into the balling behavior of selective laser melting of stainless steel and pure nickel powder was conducted. It was found that the SLM balling phenomenon can be divided into two types generally: the ellipsoidal balls with dimension of about 500 μm and the spherical balls with dimension of about 10 μm. The former is caused by worsened wetting ability and detrimental to SLM quality; the latter has no obvious detriment to SLM quality. The oxygen content plays an important role in determining the balling initiation, which can be considerably lessened by decreasing the oxygen content of atmosphere to 0.1%. A high laser line energy density, which can be obtained by applying high laser power and low scan speed, could enable a well-wetting characteristic. The effect of scan interval on balling initiation is not obvious as long as the scan track is continuous. The surface remelting procedure can also alleviate the balling effect in a certain extent, due to the melting and wetting of metal balls. Moreover, the balling phenomenon of pure nickel was also studied, and the results implied that the balling discipline had a universality.
Starting Page	1025
Ending Page	1035
Page Count	11
File Format	PDF
ISSN	02683768
Journal	The International Journal of Advanced Manufacturing Technology
Volume Number	59
Issue Number	9-12
e-ISSN	14333015
Language	English
Publisher	Springer-Verlag
Publisher Date	2011-08-18
Publisher Place	London
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	Selective laser melting Balling behavior Stainless steel Nickel Mechanical Engineering Industrial and Production Engineering Computer-Aided Engineering (CAD, CAE) and Design Production/Logistics/Supply Chain
Content Type	Text
Resource Type	Article
Subject	Industrial and Manufacturing Engineering Control and Systems Engineering Mechanical Engineering Computer Science Applications Software

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