Encyclopedie de la recherche sur l'aluminium au Quebec - Edition 2014 | Page 55

Effect of laser parameters on solidification
TRANSFORMATION ET APPLICATIONS // TRANSFORMATION AND APPLICATIONS
behaviour of aluminum alloys in SLM additive
Manufacturing

53

L'EFFET DES PARAMÈTRES DU LASER SUR LE PROCÉDÉ DE SOLIDIFICATION
DESparamètres du laser sur le procédé FUSION SÉLECTIVE AU LASER
L’effet des ALLIAGES D'ALUMINIUM FABRIQUÉS PAR

de solidification des alliages d’aluminium ON SOLIDIFICATION BEHAVIOUR
EFFECT OF LASER PARAMETERS
fabriqués par fusion ALUMINUM ALLOYS IN SLM ADDITIVE MANUFACTURING
OF sélective au laser.
Andrew Walker, Jason Milligan, Mathieu Brochu
Department of Mining and Materials Engineering, Wong Building 3610 University, McGill University

The Problem

Aluminum alloys are of great interest to the aerospace industry owing to
their high specific strength and low cost. Current work on aluminum
selective laser melting (SLM) has focused on casting alloys, generally
high in silicon. Despite showing promising results, these alloys do not
provide the mechanical performance required by the industry.
Many of the widely used high and medium strength alloys are difficult to
process via SLM due to their tendency to experience solidification
cracking (SC). SC is a phenomena strongly influenced by microsegregation of alloying elements during solidification.
It may be possible to tune solidification conditions by manipulating laser
parameters of a pulsed laser source. In particular, the solidif