Study on the Selective Laser Melting of CuSn10 Powder

Abstract

The selective laser melting of tin bronze (CuSn10) powder was performed with a laser energy density intensity level at 210, 220, and 230 J/mm2. The composition was homogeneous with almost all tin dissolved into the matrix. The grain size of the obtained alpha copper phase was around 5 μm. The best properties were achieved at 220 J/mm2 laser energy density with a density of 8.82 g/cm3, hardness of 78.2 HRB (Rockwell Hardness measured on the B scale), yield strength of 399 MPa, tensile strength of 490 MPa, and an elongation that reached 19%. “Balling effect” appeared and resulted into a decrease of properties when the laser energy density increased to 230 J/mm2.

Effect of Layer-Wise Varying Parameters on the Microstructure and Soundness of Selective Laser Melted INCONEL 718 Alloy

“…An assembly of the SEM images of the x-z section along the build direction is shown in Figure 4a. A typical cellular dendritic growth is observed, which is also mentioned in references [7,17], as well as in other SLM processed alloys [3,18]. During a selective laser melting process, molten metal solidifies so rapidly with a cooling rate of up to 10 6 K/s that there is no time for secondary dendrite arms to grow.…”

“…Laser energy density, E = P /( v · d · t ), is used to regulate the microstructure and mechanical properties [3,4]. Studies conducted in the past have shown that, with the increase in energy density, soundness and mechanical properties are significantly enhanced [5,6,7]. Swee et al [8] conducted experiments on the selective laser melting of TiTa alloy and concluded that increasing laser energy density is needed to achieve fully dense parts and to fully melt the tantalum in the powder.…”

Laser additive manufacturing of typical highly reflective materials—gold, silver and copper

“…对铜合金的打印研究则集中在锡青铜 [32][33][34][35][36][37][38] 、形 状记忆铜合金 [39][40][41][42][43][44][45] 、黄铜 [46] , 以及其他一些铜合 金 [47][48][49][50][51][52] . 表3总结了铜和铜合金的激光3D打印案例.…”

Effect of hatch distance on CuSn10 specimens by selective laser melting

“…Scudino et al, 9 achieved far better mechanical properties of CuSn 10 specimens by SLM corresponding to as-cast properties. Deng et al, 10 studied the effect of laser energy density on the microstructure, mechanical properties of Tin bronze parts by SLM and found the laser energy density is the main factor for porosity formation and the mechanical properties. In this paper, The SLM of tin bronze (CuSn 10 ) powder was performed with same laser energy density to investigate the effect of scanning speed and hatch distance on microstructure and mechanical properties.…”