...Brandon Abranovic; Elizabeth Chang-Davidson; Jack L. Beuth Purpose Laser hot wire additive manufacturing (LHWAM) is a newer technology within the space of large-scale directed energy deposition (DED) additive manufacturing (AM) processes. This study aims to map known AM flaw types such as lack...

... mixture was formed. The clear homogeneous mixture was a novel kind of 3D printing SL resin, which was named as 3DPSLR11. 3D printing was performed with HRPL-150A SLA (Wuhan Binhu Mechanical & Electrical Company, China). The wavelength of the UV laser is 365 nm. The layer thickness can be set...

... laser beam without the use of binders. Design/methodology/approach Selective laser sintering or melting (SLS/SLM) techniques are first introduced, followed by analysis of results from silica (SiO₂), zirconia (ZrO₂) and ceramic-reinforced metal matrix composites processed...

...A.R. Vinod; C.K. Srinivasa; R. Keshavamurthy; P.V. Shashikumar Purpose This paper aims to focus on reducing lead-time and energy consumption for laser-based metal deposition of Inconel-625 superalloy and to investigate the effect of process parameters on microstructure, density, surface roughness...

...Fangyong Niu; Dongjiang Wu; Guangyi Ma; Siyu Zhou; Bi Zhang Purpose – The purpose of this paper is to investigate how a second-phase doping may affect Al₂O₃ ceramic parts deposited by additive manufacturing (AM) with a laser-engineered net shaping system. Direct fabrication...

...Edward W Reutzel; Abdalla R Nassar Purpose – The purpose of this paper is to surveys classic and recently developed strategies for quality monitoring and real-time control of laser-based, directed-energy deposition.Additive manufacturing of metal parts is a complex undertaking. During deposition...

...L. Rickenbacher; T. Etter; S. Hövel; K. Wegener Purpose Selective laser melting (SLM) is being investigated by Alstom and IWF due to its flexibility, cost‐ and lead‐time reduction potential for reconditioning of hot gas path components used in today's heavy‐duty gas turbines. This paper aims...

.../approach In this process, the focus length of UV laser scanning head is changed by the dynamic focus mirror according to the building program. The beam spot in the resin surface varies with the focus length, and the laser power is adjusted accordingly to the changing spot in building process. Findings...

...Jamasp Jhabvala; Eric Boillat; Rémy Glardon Purpose Since pulsed lasers are mainly used in selective laser sintering (SLS) – contrarily to selective laser melting (SLM) – only the exterior of the powder particles is molten while their core stays solid. The purpose of this paper is to investigate...

... mechanical properties. Design/methodology/approach The selective laser melting of the ceramic materials zirconia and alumina has been investigated experimentally. The approach followed up is to completely melt ZrO₂/Al₂O₃ powder mixtures by a focused laser beam. In order...

...Mushtaq Khan; Phill Dickens Purpose Different metals have been processed using laser‐based solid freeform fabrication (SFF) processes but very little work has been published on the selective laser melting (SLM) of gold (Au). The purpose of this paper is to check the properties of gold powder...

...Jialin Yang; Hongwu Ouyang; Chao Xu; Yang Wang Purpose The purpose of this paper is to describe the stability and properties of the direct metal laser fabrication (DMLF) process, by putting forward top surface quality (TSQ), which could be a unique and crucially important feature compared...

...Thomas L. Starr; Timothy J. Gornet; John S. Usher Purpose The purpose of this paper is to measure the effect of process conditions on mechanical properties of laser‐sintered nylon 12 (Duraform^®) and to determine the range of conditions that provide consistent mechanical performance...

.... For the direct production of custom biomedical implants, selective laser melting (SLM) has been investigated to fabricate pure magnesium and its resultant properties. The primary objective of this paper is to identify the most appropriate mode of irradiation for the melting of pure magnesium powders due to its...

...William Cooke; Rachel Anne Tomlinson; Richard Burguete; Daniel Johns; Gaëlle Vanard Purpose The purpose of this paper is to rigorously determine the tensile properties of a selective laser sintering (SLS) material. Emphasis was placed on the anisotropy and inhomogeneity of the material...

...Phani Vallabhajosyula; David L. Bourell Purpose The purpose of this paper is to develop a methodology to achieve successful infiltration of indirect selective laser sintered steel components with ferrous alloys and thereby to produce fully ferrous components with desirable properties while...

...Dave Bourell; Brent Stucker; Abhishek Goel; David Bourell Purpose The purpose of this paper is to establish a scientific understanding for electrochemical infiltration of laser sintered (LS) preforms. Design/methodology/approach Electrochemical deposition techniques were modified to induce...

...Cho‐Pei Jiang Purpose The purpose of this paper is to develop a novel two‐laser beam stereolithography system which has the advantages of low cost, fabrication time reduction and high accuracy. Design/methodology/approach The wavelengths of the two semiconductor laser beams are determined...

...Kamran Mumtaz; Neil Hopkinson Purpose The purpose of this paper is to investigate the selective laser melting (SLM) of Inconel 625 using pulse shape control to vary the energy distribution within a single laser pulse. It aims to discuss the effectiveness of pulse shaping, including potential...

...Kaushik Alayavalli; David L. Bourell Purpose The purpose of this paper is to produce electrically conductive, fluid impermeable graphite bipolar plates for a direct methanol fuel cell, using indirect selective laser sintering (SLS) and suitable post processing techniques. Design/methodology...