Author:

Keywords:

Science & Technology, Technology, Nanoscience & Nanotechnology, Materials Science, Multidisciplinary, Metallurgy & Metallurgical Engineering, Science & Technology - Other Topics, Materials Science, Selective laser melting, Friction stir processing, Aluminium alloys, Ductility, Fatigue test, HIGH-CYCLE FATIGUE, MECHANICAL-PROPERTIES, MICROSTRUCTURE, BEHAVIOR, TI-6AL-4V, STRENGTH, 0204 Condensed Matter Physics, 0912 Materials Engineering, 0913 Mechanical Engineering, Materials, 4016 Materials engineering, 4017 Mechanical engineering, 5104 Condensed matter physics

Abstract:

In the effort of expanding the already existing applications of additively manufactured parts, improving mechanical performance is essential. Friction stir processing (FSP) is a promising post-treatment solution to tackle this issue. FSP of selective laser melted AlSi10Mg leads to the globularisation of the Si-rich eutectic network, microstructural homogenisation and porosity reduction. These features have been characterised using in and ex situ mechanical testing and different imaging techniques. A significant modification of the damage mechanism is reported with an increase of the fracture strain from 0.1 to 0.4 after FSP and an enhancement over two orders of magnitude in fatigue life.