Finite element analysis of thermal behavior and experimental investigation of Ti6Al4V in selective laser melting

In situ fabrication of a titanium-niobium alloy with tailored microstructures, enhanced mechanical properties and biocompatibility by using selective laser melting

“…Therefore, additive manufacturing (AM), based on a successively layer-by-layer fashion, has been increasingly explored to manufacture Ti-Nb parts from computeraided design (CAD) models. Both a high energy input into a tiny melt pool with high temperatures (above 3000 ℃) and a strong convection induced by a large temperature gradient in the melt pool can promote the diffusion between Ti and Nb, contributing to the homogeneity of elements and microstructure [11]. Selective laser melting (SLM), electron beam melting (EBM) and directed energy deposition (DED) are the major AM processes to fabricate Ti-Nb parts using pre-alloyed powders or mechanically blended powders of Ti and Nb.…”

A simplified modelling approach for thermal behaviour analysis in hybrid plasma arc-laser additive manufacturing

“…They found that substrate preheating resulted in a smoother thermal cycle and led to a decrease in the cooling rate of the melt pool. The thermal behaviour as a function of different variables in powder bed fusion (PBF) process has also been studied using an FE model [13][14][15] . However, these models are based on transient analysis, which still require relatively long computational time.…”

Effects of processing parameters on the thermal behaviour of AlSi10Mg during pulse-selective laser melting

“…However, limitation still exists and hiders the large-scale application. For example, ball effect [1], warping [2], part shrinkage [3] and crack [4]have been regarded as the most significant defects. It can be known that these defects are mainly related to the thermal behaviour of materials.…”

“…Ahmed Hussein et al conducted a finite element simulation of the temperature fields in single layers in SLM and suggested that the predicted length of the molten pool increases at higher scan speed [6]. Li et al analysed the thermal behaviour by simulation and experiments for Ti6Al4V parts and demonstrated that the width, depth and length of molten pool were inversely proportional to the scan velocity and laser power [3]. Huang et al thought that an increased laser power is more than an reduced scan velocity in thermal performance, which can adjust the temperature distribution and molten pool characters by the analysis of a single layer experiment and numerical simulation [7].…”