Abstract
For large-scale selective laser melting (SLM) additive manufacturing technology, three main problems severely restrict its development and application, namely the residual stress, defects, and columnar grains with anisotropy. To overcome these problems, a new method is proposed by combining SLM with ultrasonic impact treatment (UIT) technique. This study explores the feasibility of UIT assisted SLM, as well as the effect of UIT on the residual stress, defects and β grains of Ti-6Al-4V alloy sample. The results indicate that after the application of UIT during SLM, residual stress can be largely reduced and defects can be hammered flat and even eliminated. Meanwhile, the epitaxial growth of columnar grains is prevented, and fine equiaxed grains are formed due to plastic deformation and recrystallization.
Highlights
Selective laser melting (SLM), as an additive manufacturing technology, is mainly used to fabricate small scale and high-precision components [1,2,3,4]
Compared with other large-scale additive manufacturing technologies based on powder or wire feeding [5,6,7], the predominant advantage of the large-scale SLM lies in the better mechanical properties and higher precision
A preliminary investigation integrated into ofUIT. On in these considerations, we explore the is feasibility undertaken to determine the in effect of UITAon the residual stress, defects and grains
Summary
Selective laser melting (SLM), as an additive manufacturing technology, is mainly used to fabricate small scale and high-precision components [1,2,3,4]. In recent years, large-scale manufacturing has gradually become an important trend of SLM. The size of the largest available commercial equipment has achieved 800 × 400 × 500 mm (Concept Laser X line 2000R). SLM can be used to fabricate large-scale components in the near future, such as large scale aerospace titanium components. Compared with other large-scale additive manufacturing technologies based on powder or wire feeding [5,6,7], the predominant advantage of the large-scale SLM lies in the better mechanical properties and higher precision. Three problems still severely restrict the development and application of large-scale
Sign-in/Register to view highlights & summary Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
