A study of the microstructural evolution during selective laser melting of Ti–6Al–4V / Lore Thijs in Acta materialia, Vol. 58 N° 9 (Mai 2010)  

Public ISBD [article]  inActa materialia > Vol. 58 N° 9 (Mai 2010) . - pp. 3303–3312 Titre : A study of the microstructural evolution during selective laser melting of Ti–6Al–4V Type de document : texte imprimé Auteurs : Lore Thijs, Auteur ; Frederik Verhaeghe, Auteur ; Tom Craeghs, Auteur Année de publication : 2011 Article en page(s) : pp. 3303–3312 Note générale : Métallurgie Langues : Anglais (eng) Mots-clés : Selective laser melting Additive manufacturing Laser treatment Titanium alloys Optical microscopy Résumé : Selective laser melting (SLM) is an additive manufacturing technique in which functional, complex parts can be created directly by selectively melting layers of powder. This process is characterized by highly localized high heat inputs during very short interaction times and will therefore significantly affect the microstructure. In this research, the development of the microstructure of the Ti–6Al–4V alloy processed by SLM and the influence of the scanning parameters and scanning strategy on this microstructure are studied by light optical microscopy. The martensitic phase is present, and due to the occurrence of epitaxial growth, elongated grains emerge. The direction of these grains is directly related to the process parameters. At high heat inputs it was also found that the intermetallic phase Ti3Al is precipitated during the process. DEWEY : 669 ISSN : 1359-6454 En ligne : http://www.sciencedirect.com/science/article/pii/S135964541000090X [article] A study of the microstructural evolution during selective laser melting of Ti–6Al–4V [texte imprimé] / Lore Thijs, Auteur ; Frederik Verhaeghe, Auteur ; Tom Craeghs, Auteur . - 2011 . - pp. 3303–3312. Métallurgie Langues : Anglais (eng) in Acta materialia > Vol. 58 N° 9 (Mai 2010) . - pp. 3303–3312 Mots-clés : Selective laser melting Additive manufacturing Laser treatment Titanium alloys Optical microscopy Résumé : Selective laser melting (SLM) is an additive manufacturing technique in which functional, complex parts can be created directly by selectively melting layers of powder. This process is characterized by highly localized high heat inputs during very short interaction times and will therefore significantly affect the microstructure. In this research, the development of the microstructure of the Ti–6Al–4V alloy processed by SLM and the influence of the scanning parameters and scanning strategy on this microstructure are studied by light optical microscopy. The martensitic phase is present, and due to the occurrence of epitaxial growth, elongated grains emerge. The direction of these grains is directly related to the process parameters. At high heat inputs it was also found that the intermetallic phase Ti3Al is precipitated during the process. DEWEY : 669 ISSN : 1359-6454 En ligne : http://www.sciencedirect.com/science/article/pii/S135964541000090X

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