Ultrasonic-Assisted Laser Metal Deposition (LMD) of Steel 316L

The parts produced by Laser Metal Deposition (LMD) usually contain deposition defects such as pores, cavities and micro-cracks, which have a negative influence on the quality and mechanical properties. This work examines the use of ultrasonic vibrations to reduce the most common deposition defects....

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Bibliographic Details
Published in:Procedia CIRP 2022, Vol.113, p.307-311
Main Authors: Rabiey, Mohammad, Weidmann, Ralph, Sgier, Samuel, Urban, Luca
Format: Article
Language:English
Subjects:
Additive manufacturing
laser cladding
laser metal deposition
ultrasonic-assisted process
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Summary:The parts produced by Laser Metal Deposition (LMD) usually contain deposition defects such as pores, cavities and micro-cracks, which have a negative influence on the quality and mechanical properties. This work examines the use of ultrasonic vibrations to reduce the most common deposition defects. A series of tests are carried out (with and without ultrasonic assistance) to obtain comparative values. These values are analysed for particular purposes and the results show that the ultrasonic-assisted process leads to higher efficiency in powder utilization. Pores and micro-cracks are successfully reduced and crystal grains are visibly refined. However, the improvement of these geometric and microstructural properties does not lead to an increase in tensile strength and hardness. The fundamental investigation presented in this work proves that ultrasonic wave contributes to an efficient and effective LMD process.
ISSN:2212-8271
2212-8271
DOI:10.1016/j.procir.2022.09.107