Microstructural and Mechanical Properties of Selective Laser Melted Al 4047

Abstract

Selective laser melting (SLM) has been recognized as a pertinent process for manufacturing of complex geometries. Al 4047 has been manufactured in this study with different processing parameters of the SLM process to obtain the optimal parameters suitable for required applications, as well as to determine the effect of these parameters and post-processing heat treatment on mechanical properties. A unique Al-Si eutectic microstructure is obtained with Al dendrites growing in the scanning direction. Mechanical properties of the SLM manufactured Al 4047 are at par with those of conventionally manufactured alloy. These properties can be varied by changing the SLM process parameters which can help controlling the process cost depending upon required mechanical properties.

Computed tomography for characterization of fatigue performance of selective laser melted parts

“…These studies have reported quasistatic tensile strength of SLM manufactured Ti-6Al-4V as comparable, and in cases better, to those of conventionally manufactured alloy [6,8]. Similar behavior has been observed for Al alloys AlSi10Mg [9] and AlSi12 [10,11]. Fatigue performance of the as-built alloys is usually impaired due to surface roughness as well as process-induced porosity.…”

“…The specimens were melted using laser power of 350 W, and a scan speed of 930 mm/s (batch I). The details of the process set up can be seen elsewhere [10]. The specimens ( Fig.…”

Very high cycle fatigue and fatigue crack propagation behavior of selective laser melted AlSi12 alloy

“…Cylindrical samples were manufactured in a building direction perpendicular to the platform with dimensions of £ 9 Â 110 mm. Complete details of the process set up can be found in [26]. SLM processing was carried out with a laser power of 350 W, scan speed of 930 mm/s, hatch spacing of 0.19 mm and layer thickness of 50 lm, resulting in an energy density of 39.6 J/mm 3 .…”

ISSLEDOVANIE OSOBENNOSTEJ FORMIROVANIJa STRUKTURY IZDELIJ IZ SPLAVA AK12, POLUChENNYH METODOM JeLEKTRONNO-LUChEVOGO ADDITIVNOGO PROIZVODSTVA

“…Детали из сплава АК12 зачастую используют в качестве поршней двигателей, картеров двигателей автомобилей или автомобильных узлов [5][6][7][8][9]. На сегодняшний день уже исследованы изделия с использованием аддитивных технологий из сплава Al-12Si преимущественно в работах методом селективного лазерного плавления [8][9][10], но встречается и в работах с применением дуговой проволочной аддитивной технологией [11]. Из-за высокой отражательной способности лазера и из-за высокой пористости, получаемых дуговой аддитивной технологией изделий, стоит перейти к методу электронно-лучевого плавления.…”