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Article Dans Une Revue International Journal of Advanced Manufacturing Technology Année : 2022

Geometrical defect analysis of overhang geometry produced by electron beam melting: experimental and statistical investigations

Yann Ledoux
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Soukaina Ghaoui
  • Fonction : Auteur
Thanh Hoang Vo
Alex Ballu
François Villeneuve
Frédéric Vignat
Matthieu Museau

Résumé

While Electron Beam Melting is used to produce near net shape parts, it is still important to study geometrical defects since the final parts may include a serious change of geometry or considerable distortions, and thus cannot match the desired geometry even after machining. For example, overhang geometries are very challenging to manufacture, because of the defects they present, such as warping, side loss, raised edges, etc. The objective of the present paper is to identify relations between the typical geometrical defects found in parts that include overhang volumes, especially side loss and warping defects. The originality of this study lies in the manufacture of a large number of Ti-6Al-4V parts in order to carry out a statistical analysis of the results. Correlations are studied between the characteristic parameters of the defects and as a function of the manufacturing conditions. In addition, a principal component analysis is proposed to identify families of defects (modes). Finally, future prospects are discussed for designing parts with the aim of improving geometric quality and for simulating defects.
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Dates et versions

hal-03767332 , version 1 (01-09-2022)

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Citer

Yann Ledoux, Soukaina Ghaoui, Thanh Hoang Vo, Alex Ballu, François Villeneuve, et al.. Geometrical defect analysis of overhang geometry produced by electron beam melting: experimental and statistical investigations. International Journal of Advanced Manufacturing Technology, 2022, ⟨10.1007/s00170-022-10040-6⟩. ⟨hal-03767332⟩
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