Microstructural evolution and characterization of AlSi10Mg alloy manufactured by selective laser melting

Microstructure and Mechanical Properties of an Al–Mg–Si–Zr Alloy Processed by L-PBF and Subsequent Heat Treatments

“…Figure 4 shows the microstructure of the as-built specimens. As is well known, the microstructure is divided into fine-grain regions and coarse-grain regions [ 2 , 8 ]. Fine-grain regions (shown in Figure 4 b) were located at the bottom of the melt pools and consist of equiaxed grains and two types of sub-micron precipitates.…”

“…The lattice structure of the Al 3 Zr phase was tetragonal with a unit cell parameter of a = 0.3998 nm, and the consequent interplanar spacing of the (101) planes of the Al 3 Zr phase was 0.390 nm. The selected area electron diffraction pattern shown in Figure 7 c was observed from the zone axis of [ 1 , 2 , 3 , 4 , 5 , 6 , 7 , 8 , 9 , 10 , 11 ] and indicated a 0.414 nm interplanar spacing of the (101) planes. From this result, it was measured to be about 5.9% larger than the interplanar spacing of the (101) plane on the Al 3 Zr phase.…”

“…In addition, aluminum alloys, with an excellent strength-to-weight ratio and formability from the addition of elements such as magnesium, copper, zinc, and manganese, are widely used throughout industrial fields [ 5 , 6 ]. However, when it comes to additive manufacturing, interest in aluminum alloys has been initially lower than interest in steel, nickel alloys, and titanium alloys due to the dense surface oxide film, high laser reflectance, and low spreadability [ 6 , 7 , 8 ]. Therefore, the number of aluminum alloys for additive manufacturing was very limited and comprised mostly aluminum casting alloys (e.g., AlSi 7 Mg, AlSi 10 Mg) [ 2 ].…”

The densification, microstructure, and mechanical properties of (TiB2+SiC)/AlSi10Mg composites manufactured by LPBF

“…The laser powder bed fusion (LPBF) technique is an important metal additive manufacturing method. Compared with the traditional method of preparing AMCs, LPBF utilises a high-energy laser beam to melt and solidify metal powder layer by layer, and directly prepares complex metal parts with full density and precise size [6][7][8][9][10]. In addition, the extremely fast melting/cooling rate (10 5 ∼ 10 6 K/s) during LPBF results in a remarkably refined grain size, which can further enhance the properties [7].…”

Spatial Array Configuration Effect of Body‐Centered Cubic Lattice Structures with Finite Unit Cells

“…With the dramatic developments of additive manufacturing (AM, also named 3D printing) technologies, multilayer periodic lattice structures can be efficiently fabricated easily even with complex internal hollow structures. [21,22] However, previous investigations are deeply focused on comparing the behaviors of different cell topologies [23] or the same cell topology with varied relative densities. [24] Most of them are combining experimental and numerical methods.…”