Review on powder-bed laser additive manufacturing of Inconel 718 parts
01 Sep 2017-Vol. 231, Iss: 11, pp 0954405415619883
TL;DR: A thorough literature review on the powder-bed laser additive manufacturing processes such as selective laser melting of Inconel 718 parts is presented in this article, where the authors introduce the gen...
Abstract: This study presents a thorough literature review on the powder-bed laser additive manufacturing processes such as selective laser melting of Inconel 718 parts. This article first introduces the gen...
Citations
More filters
TL;DR: A review of the most widely used additive manufacturing (AM) techniques for biomedical applications is presented in this paper, where special attention has been paid on Fused deposition modeling (FDM) based AM technique as it is economical, environmentally friendly and adaptable to flexible filament material.
575 citations
TL;DR: Inconel 718 is one of the most commonly employed alloys for metal additive manufacturing (MAM) and has a wide range of applications in aircraft, gas turbines, turbocharger rotors, and a variety of other corrosive and structural applications involving temperatures of up to ∼700°C as discussed by the authors.
Abstract: Inconel 718 is one of the most commonly employed alloys for metal additive manufacturing (MAM) and has a wide range of applications in aircraft, gas turbines, turbocharger rotors, and a variety of other corrosive and structural applications involving temperatures of up to ∼700 °C. Numerous studies have investigated different aspects of the mechanical behaviour of additively manufactured (AM) Inconel 718. This study analyses the observations from more than 170 publications to provide an unbiased engineering overview for the mechanical response of AM Inconel 718 (and its variations and spread among different reports). First, a brief review of the microstructural features of AM Inconel 718 is presented. This is followed by a comprehensive summary of tensile strength, hardness, fatigue strength, and high-temperature creep behaviour of AM Inconel 718 for different types of MAM techniques and for different process and post-process conditions.
306 citations
TL;DR: In this article, the microstructural design of Inconel 718 specimens produced by selective laser melting (SLM) was adjusted through process parameters manipulation and post-process heat treatment, and the effects of heat treatment on microstructure, process induced defects, deformation behaviour and failure mechanisms were studied.
233 citations
TL;DR: In this paper, the authors present the latest achievements and industrial applications of additive manufacturing and investigate the sustainability dimensions of the additive manufacturing process and the added values in economic, social, and environment sections.
Abstract: Additive manufacturing (AM) or three-dimensional (3D) printing has introduced a novel production method in design, manufacturing, and distribution to end-users. This technology has provided great freedom in design for creating complex components, highly customizable products, and efficient waste minimization. The last industrial revolution, namely industry 4.0, employs the integration of smart manufacturing systems and developed information technologies. Accordingly, AM plays a principal role in industry 4.0 thanks to numerous benefits, such as time and material saving, rapid prototyping, high efficiency, and decentralized production methods. This review paper is to organize a comprehensive study on AM technology and present the latest achievements and industrial applications. Besides that, this paper investigates the sustainability dimensions of the AM process and the added values in economic, social, and environment sections. Finally, the paper concludes by pointing out the future trend of AM in technology, applications, and materials aspects that have the potential to come up with new ideas for the future of AM explorations.
203 citations
30 May 2017
TL;DR: In this paper, the structure, texture and phase evolution of the as-printed and heat treated IN718 superalloy Cylindrical specimens, printed by powder-bed additive manufacturing technique, were subjected to two post-treatments: homogenization (1100 °C, 1 h, furnace cooling) and hot isostatic pressing (HIP)
Abstract: 3D printing results in anisotropy in the microstructure and mechanical properties The focus of this study is to investigate the structure, texture and phase evolution of the as-printed and heat treated IN718 superalloy Cylindrical specimens, printed by powder-bed additive manufacturing technique, were subjected to two post-treatments: homogenization (1100 °C, 1 h, furnace cooling) and hot isostatic pressing (HIP) (1160 °C, 100 MPa, 4 h, furnace cooling) The Selective laser melting (SLM) printed microstructure exhibited a columnar architecture, parallel to the building direction, due to the heat flow towards negative z-direction Whereas, a unique structural morphology was observed in the x-y plane due to different cooling rates resulting from laser beam overlapping Post-processing treatments reorganized the columnar structure of a strong {002} texture into fine columnar and/or equiaxed grains of random orientations Equiaxed structure of about 150 µm average grain size, was achieved after homogenization and HIP treatments Both δ-phase and MC-type brittle carbides, having rough morphologies, were formed at the grain boundaries Delta-phase formed due to γ″-phase dissolution in the γ matrix, while MC-type carbides nucleates grew by diffusion of solute atoms The presence of (Nb078Ti022)C carbide phase, with an fcc structure having a lattice parameter a = 443 A, was revealed using Energy dispersive spectrometer (EDS) and X-ray diffractometer (XRD) analysis The solidification behavior of IN718 alloy was described to elucidate the evolution of different phases during selective laser melting and post-processing heat treatments of IN718
184 citations
Cites background from "Review on powder-bed laser additive..."
...Among nickel-iron superalloys family, IN718 stands out for its excellent mechanical properties and good corrosion resistance at elevated temperatures, up to 650 ◦C, making it the most extensively used superalloy [2,6]....
[...]
...It has been reported that the size and shape of the melting pool are mainly governed by the laser parameters (power, travel speed and beam diameter) and scanning strategy (hatch angle and hatch distance parameters) [2,29]....
[...]
...reported that the size and shape of the melting pool are mainly governed by the laser parameters (power, travel speed and beam diameter) and scanning strategy (hatch angle and hatch distance parameters) [2,29]....
[...]
...7%) solid structures with mechanical properties comparable to those achieved by wrought or casting processes, depending on the initial powder composition and process parameters [1,2]....
[...]
References
More filters
TL;DR: In this article, the development of the microstructure of the Ti-6Al-4V alloy processed by selective laser melting (SLM) was studied by light optical microscopy.
2,201 citations
TL;DR: In this paper, a simple theoretical model is developed to predict residual stress distributions in selective laser sintering (SLS) and selective laser melting (SLM), aiming at a better understanding of this phenomenon.
Abstract: Purpose – This paper presents an investigation into residual stresses in selective laser sintering (SLS) and selective laser melting (SLM), aiming at a better understanding of this phenomenon.Design/methodology/approach – First, the origin of residual stresses is explored and a simple theoretical model is developed to predict residual stress distributions. Next, experimental methods are used to measure the residual stress profiles in a set of test samples produced with different process parameters.Findings – Residual stresses are found to be very large in SLM parts. In general, the residual stress profile consists of two zones of large tensile stresses at the top and bottom of the part, and a large zone of intermediate compressive stress in between. The most important parameters determining the magnitude and shape of the residual stress profiles are the material properties, the sample and substrate height, the laser scanning strategy and the heating conditions.Research limitations/implications – All exper...
1,415 citations
TL;DR: In this paper, the effect of several heat treatments on the microstructure and mechanical properties of Ti6Al4V processed by Selective Laser Melting (SLM) is studied.
1,320 citations
TL;DR: In this article, the authors describe which types of laser-induced consolidation can be applied to what type of material, and demonstrate that although SLS/SLM can process polymers, metals, ceramics and composites, quite some limitations and problems cause the palette of applicable materials still to be limited.
1,241 citations
"Review on powder-bed laser additive..." refers background in this paper
...INTRODUCTION Additive manufacturing (AM) is currently one of the rapidly developing advanced manufacturing techniques in the world [1-3] and it has exhibited extensive application perspective [4-6]....
[...]
TL;DR: Rapid prototyping generally refers to techniques that produce shaped parts by gradual creation or addition of solid material, therein differing fundamentally from forming and material removal manufacturing techniques as mentioned in this paper. But it is not suitable for all applications.
1,185 citations