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Journal ArticleDOI

Microstructure and mechanical properties of Selective Laser Melted 18Ni-300 steel

01 Jan 2011-Physics Procedia (Elsevier BV)-Vol. 12, Iss: 1, pp 255-263
TL;DR: In this article, the influence of process parameters in SLM (e.g., scan speed and layer thickness) and various age hardening treatments on the microstructure and mechanical properties of 18Ni-300 steel is investigated.
About: This article is published in Physics Procedia.The article was published on 2011-01-01 and is currently open access. It has received 425 citations till now. The article focuses on the topics: Selective laser sintering & Selective laser melting.
Citations
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Journal ArticleDOI
TL;DR: A review of the emerging research on additive manufacturing of metallic materials is provided in this article, which provides a comprehensive overview of the physical processes and the underlying science of metallurgical structure and properties of the deposited parts.

4,192 citations

Journal ArticleDOI
TL;DR: In this paper, the authors describe the complex relationship between additive manufacturing processes, microstructure and resulting properties for metals, and typical microstructures for additively manufactured steel, aluminium and titanium are presented.

2,837 citations

Journal ArticleDOI
TL;DR: Selective laser melting (SLM) is a particular rapid prototyping, 3D printing, or additive manufacturing (AM) technique designed to use high power-density laser to melt and fuse metallic powders as mentioned in this paper.
Abstract: Selective Laser Melting (SLM) is a particular rapid prototyping, 3D printing, or Additive Manufacturing (AM) technique designed to use high power-density laser to melt and fuse metallic powders. A component is built by selectively melting and fusing powders within and between layers. The SLM technique is also commonly known as direct selective laser sintering, LaserCusing, and direct metal laser sintering, and this technique has been proven to produce near net-shape parts up to 99.9% relative density. This enables the process to build near full density functional parts and has viable economic benefits. Recent developments of fibre optics and high-power laser have also enabled SLM to process different metallic materials, such as copper, aluminium, and tungsten. Similarly, this has also opened up research opportunities in SLM of ceramic and composite materials. The review presents the SLM process and some of the common physical phenomena associated with this AM technology. It then focuses on the following a...

1,455 citations

Journal ArticleDOI
TL;DR: In this article, the service properties of AM parts are described, including physical, mechanical, optical and electrical properties, and an additive manufacturability index is proposed, based on the seven categories of ISO/ASTM AM categories.

636 citations

Journal ArticleDOI
TL;DR: Three different alloys, covering a large range of technology readiness levels, are selected to illustrate particular microstructural features developed by AM and clarify the engineering paradigm relating process–microstructure–property.

632 citations

References
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01 Aug 2006
TL;DR: In this paper, the authors investigated the possibility of producing medical or dental parts by selective laser melting (SLM) and developed a procedure to fabricate frameworks for complex dental prostheses.
Abstract: Purpose – This paper seeks to investigate the possibility of producing medical or dental parts by selective laser melting (SLM). Rapid Manufacturing could be very suitable for these applications due to their complex geometry, low volume and strong individualization.Design/methodology/approach – The SLM‐process has been optimized and fully characterized for two biocompatible metal alloys: Ti‐6Al‐4V and Co‐Cr‐Mo. Mechanical and chemical properties were tested and geometrical feasibility, including process accuracy and surface roughness, was discussed by benchmark studies. By developing a procedure to fabricate frameworks for complex dental prostheses, the potential of SLM as a medical manufacturing technique has been proved.Findings – Optimized SLM parameters lead to part densities up to 99.98 percent for titanium. Strength and stiffness, corrosion behavior, and process accuracy fulfil requirements for medical or dental parts. Surface roughness analyses show some limitations of the SLM process. Dental frame...

776 citations

Journal ArticleDOI
TL;DR: In this article, the authors investigated the possibility of producing medical or dental parts by selective laser melting (SLM) and developed a procedure to fabricate frameworks for complex dental prostheses.
Abstract: Purpose – This paper seeks to investigate the possibility of producing medical or dental parts by selective laser melting (SLM). Rapid Manufacturing could be very suitable for these applications due to their complex geometry, low volume and strong individualization.Design/methodology/approach – The SLM‐process has been optimized and fully characterized for two biocompatible metal alloys: Ti‐6Al‐4V and Co‐Cr‐Mo. Mechanical and chemical properties were tested and geometrical feasibility, including process accuracy and surface roughness, was discussed by benchmark studies. By developing a procedure to fabricate frameworks for complex dental prostheses, the potential of SLM as a medical manufacturing technique has been proved.Findings – Optimized SLM parameters lead to part densities up to 99.98 percent for titanium. Strength and stiffness, corrosion behavior, and process accuracy fulfil requirements for medical or dental parts. Surface roughness analyses show some limitations of the SLM process. Dental frame...

738 citations

Journal ArticleDOI
TL;DR: In this paper, the authors investigated the precipitation hardening behavior of an 18Ni-Co-Mo-Ti maraging 300 solution treated and aged in the 440-650°C range.

73 citations

Journal ArticleDOI
TL;DR: In this paper, the densification and microstructure of M2 high speed steel powder processed by direct laser sintering method was studied, and test specimens were produced using a 200 W continuous...
Abstract: In the present work, the densification and microstructure of M2 high speed steel powder processed by direct laser sintering method was studied. Test specimens were produced using a 200 W continuous...

69 citations

Journal ArticleDOI
TL;DR: In this paper, the influence of taking into account the chemical compositions of austenite and martensite phases in the results by the direct comparison method was evaluated by X-ray diffraction.
Abstract: In this paper, quantifications of the austenitic phase in a maraging 300 steel heat treated at different temperatures and periods of time were carried out using the direct comparison method by X-ray diffraction. The influence of taking into account the chemical compositions of austenite and martensite phases in the results by the direct comparison method was evaluated. In order to analyze the instability of austenite under plastic deformation, the quantifications were carried out with and without previous grinding of the samples. The behavior of the austenite volume fraction against aging time at 560°C, 600°C and 650°C were determined. The variation of the martensite lattice parameter with aging time was also analyzed. The results show an increase of the austenite content with aging time at 560°C and 600°C. At 650°C, however, the austenite content present at room temperature decreases and the martensite parameter increases with the aging time above 1 h.

61 citations