Additive manufacturing of metals

3D printing of Aluminium alloys: Additive Manufacturing of Aluminium alloys using selective laser melting

A review of selective laser melting of aluminum alloys: Processing, microstructure, property and developing trends

Selective laser melting of nano-TiB 2 decorated AlSi10Mg alloy with high fracture strength and ductility

A critical review of powder-based additive manufacturing of ferrous alloys: Process parameters, microstructure and mechanical properties

Selective laser melting, due to the high energy density input and the small interaction time (106 K/s), can result in an ultrafine microstructure and excellent mechanical properties. However, due to the nonuniform nature of the temperature distribution and the transition from liquid to solid, high residual stresses exist. High residual stresses in the parts can increase the risk of material distortion and cause many problems, such as dimensional inaccuracy or cracks. This work systematically investigated the influence of annealing on the microstructure and mechanical properties of SLM-processed AlSi7Mg alloy parts. The residual stresses relaxed significantly after annealing. The Vickers hardness and the tensile stress greatly reduced, while the elongation increased. The fracture mode of the as-fabricated sample was ductile and brittle mixed fracture, whereas the fracture morphology of the annealed sample presented many more dimples, and the elongation also increased, which indicated the ductile mode.

Effects of annealing on the microstructure and mechanical properties of selective laser melted AlSi7Mg alloy

Selective laser melting of carbon/AlSi10Mg composites: Microstructure, mechanical and electronical properties

Amorphous alloy strengthened stainless steel manufactured by selective laser melting: Enhanced strength and improved corrosion resistance

This paper presents a study on the formation, microstructure and mechanical property of Cr 3 C 2 /Fe nanocomposites using selective laser melting (SLM). Scanning electron microscope (SEM), transmission electron microscope (TEM) and tensile tests were conducted to investigate the influence of Cr 3 C 2 particulates on the microstructure and mechanical properties. It was found that the porosity decreased when volumetric energy density increased from 27 to 37 J/mm 3 , then rose to 55 J/mm 3 . The results showed that the Cr 3 C 2 particulates decomposed completely during SLM process and interacted with Fe matrix to form (α-Fe, Cr) solid solution and M(Fe, Cr) 23 C 6 carbides. In addition, due to the characteristic of rapid solidification, very fine grains were obtained throughout the composites. The tensile tests showed that the ultimate tensile strength could reach up to 1158 MPa.

Integral method of preparation and fabrication of metal matrix composite: Selective laser melting of in-situ nano/submicro-sized carbides reinforced iron matrix composites

Stainless steel was investigated in terms of the evolution mechanism of chemical elements during selective laser melting. It was found that 21% carbon was lost and the decarburization occurred. The carbon-gradient structure contributes to a low Young's Modulus and hardness in molten pool boundary and also anisotropic tensile properties.

Yuanjie Zhang

Papers

Effects of annealing on the microstructure and mechanical properties of selective laser melted AlSi7Mg alloy

Selective laser melting of carbon/AlSi10Mg composites: Microstructure, mechanical and electronical properties

Amorphous alloy strengthened stainless steel manufactured by selective laser melting: Enhanced strength and improved corrosion resistance

Integral method of preparation and fabrication of metal matrix composite: Selective laser melting of in-situ nano/submicro-sized carbides reinforced iron matrix composites

Decarburization of stainless steel during selective laser melting and its influence on Young's modulus, hardness and tensile strength