Microstructural and mechanical aspects of AlSi7Mg0.6 alloy related to scanning strategies in L-PBF
Langue
EN
Article de revue
Ce document a été publié dans
International Journal of Advanced Manufacturing Technology. 2022-04, vol. 120, n° 9-10, p. 6205-6223
Résumé en anglais
AlSi7Mg0.6 alloy is the most widely used cast alloy for aerospace and automotive applications. Therefore, it is essential to explore the effect of scanning strategy parameters on the final part properties in the laser ...Lire la suite >
AlSi7Mg0.6 alloy is the most widely used cast alloy for aerospace and automotive applications. Therefore, it is essential to explore the effect of scanning strategy parameters on the final part properties in the laser powder bed fusion (L-PBF) process. The effect of stripes and chessboard strategies parameters such as stripe length, rotation angle, and chessboard island size on mechanical and microstructural properties of L-PBF processed AlSi7Mg0.6 alloy is studied. The evolution of the residual stresses is also investigated in the longitudinal and transverse directions. Cooling rates are also estimated using the cell size within the melt pool. Three distinct regions (i.e., fine, coarse, and heat-affected zone) within the melt pool corresponding to different cooling rates could be identified based on Si morphology. The texture of the final material can be tailored by changing the scanning strategies. This study comprehensively presents the results concerning porosity, mechanical properties, crystallographic texture, cooling rates, grain morphology, and residual stresses for additively manufactured AlSi7Mg0.6 alloy.< Réduire
Mots clés en anglais
Laser powder bed fusion
Quality assurance
Residual stresses
Crystallographic texture
Unités de recherche