... modelling approach for its better understanding. Design/methodology/approach A systematic review of the literature available in the area of continuum modelling practices adopted for the powder bed fusion (PBF) AM processes for the deposition of powder layer over the substrate along with quantification...

...Yajuan Zhang; Xiaoyan Song; Haibin Wang; Zuoren Nie Purpose The purpose of this paper is to propose a novel method to prepare pure Ti powder for 3D printing with tailorable particle size distribution. Design/methodology/approach The main procedures of the present method consist of gas state...

... Realizer SLM 250; density and microscopic photographs show the ceramic melting situation. The density of cubic sample with different laser powers and different scanning velocities is measured by Archimedes method. The microstructure of samples and powder is observed by SEM. The micro-hardness is measured...

...Haihong Zhu; Linda Ke; Wenjuan Lei; Cheng Dai; Baijin Chen Purpose The purpose of this paper is to investigate the effect of the Q‐switching parameters on the sintering behavior of laser micro sintering Cu‐based metal powder, using Q‐switched 1064 nm Nd‐YAG laser. Design/methodology/approach...

...J. Suwanprateeb; F. Thammarakcharoen; K. Wasoontararat; W. Suvannapruk Purpose The purpose of this paper is to study the influence of changing printing parameters (powder layer thickness and binder saturation) in a three dimensional printing machine (3DP) on the transformation of 3DP printed...

...A. Rangesh; William O'Neill Purpose The purpose of this paper is to investigate the feasibility of using a pulsed Tungsten inert gas arc to fully melt and consolidate stainless steel powder onto a stainless steel substrate. The technology aims to bridge the gap between selective laser sintering...

...Gangxian Zhu; Dichen Li; Anfeng Zhang; Gang Pi; Yiping Tang Purpose The purpose of this paper is to investigate the influencing rule of the standoff distance variations between the nozzle outlet and the powder deposition point on forming dimensional accuracy. Design/methodology/approach...

.../nylon‐12 composite powder (3 wt% OMMT). X‐ray diffraction (XRD) was used to characterize nanostructure features. The dispersion of OMMT in the nylon‐12 matrix was observed by scanning electron microscope (SEM). The effect of OMMT on the thermal properties of nylon‐12 was studied by differential scanning...

...Cho‐Pei Jiang Purpose The purpose of this paper is to propose a method for fabricating tumor vessel phantom and then investigate the thermal dosage profile caused by high‐intensity‐focused ultrasound (HIFU) surgery. Design/methodology/approach In this paper, a thermal sensitive powder has been...

... of its products. The purpose of this paper is to present modeling of the heat transfer process, to understand the sintering phenomena that are experienced by powder particles in the SLS powder bed during the sintering process. With the understanding of sintering process obtained through the theoretical...

... to the microstructure, the tensile strength of the additive manufactured parts is higher than the strength of hot worked parts, whereas the ductility is lower. A pre‐heating of the powder bed is effective in assisting remelting and reducing residual stresses, but ductility does not increase significantly, since...

...M. Dressler; M. Röllig; M. Schmidt; A. Maturilli; J. Helbert Purpose This purpose of this paper is to report about the temperature distribution in metal and ceramic powder beds during 3D printing. The differing powders are thoroughly characterized in terms of thermal conductivity, thermal...

... in which complex 3D parts can be generated by consolidating powdered material in layers. RP technology has the potential to overcome design constraints imposed by existing manufacturing methods due to increased versatility in geometric shape manufacture. Since its inception in the early 1980s...

...Cheekur Krishnamurthy Srinivasa; Chinnakurli Suryanarayana Ramesh; S.K. Prabhakar Purpose The purpose of this paper is to study the effect of blending time, SiC content and fill ratio on the homogeneity of iron‐silicon carbide powder mixture, blended in double‐cone blender; to evaluate density...

... the melt pool. Originality/value This paper is the first of its kind to employ laser pulse shape control during SLM to process material from powder bed. It is a useful aid in unveiling relationships between laser energy distribution and the formation of parts. Kamran Mumtaz can be contacted...

...Lino Costa; Deepak Rajput; Kathleen Lansford; Wenqiang Yue; Alexander Terekhov; William Hofmeister Purpose The purpose of this paper is to develop a simple, easy to implement powder delivery strategy for solid freeform fabrication (SFF) processing. Design/methodology/approach A specially...

... delivery devices. A compact adaptation system for the SLS is needed to obtain a more effective and efficient way of sintering small‐scale prototypes so as to reduce powder wastage. Limitations of available smaller‐scale adaptation devices include the need of additional electrical supplies for the device...

... prototyping applications have frequently implemented the use of powder delivery nozzles and high power fibre‐coupled diode lasers with highly convergent laser beams. Owing to the complexity and variety of the process parameters involved in this technology, mathematical models are necessary to understand...

...Lino Costa; Rui Vilar Purpose The purpose of this paper is to review the state of the art of laser powder deposition (LPD), a solid freeform fabrication technique capable of fabricating fully dense functional items from a wide range of common engineering materials, such as aluminum alloys, steels...

...S. Yang; M.M. Mohebi; J.R.G. Evans Purpose The purpose of this paper is to present a new powder‐based solid freeforming method based on conventional furnace sintering after co‐deposition of mould and part powder materials. Design/methodology/approach Based on acoustic powder deposition, both...