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JournalISSN: 0030-3992

Optics and Laser Technology 

Elsevier BV
About: Optics and Laser Technology is an academic journal published by Elsevier BV. The journal publishes majorly in the area(s): Laser & Materials science. It has an ISSN identifier of 0030-3992. Over the lifetime, 9475 publications have been published receiving 143396 citations. The journal is also known as: Optics and laser technology.


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Journal ArticleDOI
TL;DR: In this article, the Inconel-718 alloys were manufactured by selective laser melting (SLM) with 2×2mm 2, 3×3mm 2, 5×5mm 2 and 7×7mm 2 island scanning strategies.
Abstract: Inconel-718 has received an extensive using in mold industry. The selective laser melting (SLM) is providing an ideal means for manufacturing mold insert with complex geometrical features and internal architecture. During the manufacturing of high quality mold inserts with conformal cooling channel, the parameters play a vital role in the SLM process. In the study, the Inconel-718 alloys were manufactured by SLM with 2×2 mm 2 , 3×3 mm 2 , 5×5 mm 2 , and 7×7 mm 2 island scanning strategies. The microstructure, mechanical property, and residual stress were investigated by optical microscope, tensile test and Vickers micro-indentation, respectively. It can be found that the relative density increased with enlarging the island size; the results on the microstructure indicated that the cracks and more pores were detected in the 22-specimen; whilst the microstructures of all specimens were composed of fine dendritic grains, cellular, and columnar structures; the tensile testing suggested that the ultimate tensile strength and yield strength of all samples was similar; while the outcome of the residual stress showed that the value of residual stress was ranked in the following sequence: 22-specimen

367 citations

Journal ArticleDOI
TL;DR: The results of experimental investigations into erbium glass lasers and their likely applications are discussed in this paper, where regularities of the inversion energy accumulation, also as channels of energy losses, are covered in detail.
Abstract: In this paper results of experimental investigations into erbium glass lasers and their likely applications are discussed. Regularities of the inversion energy accumulation, also as channels of energy losses, are covered in detail. Different erbium lasers, both flashtube and neodymium laser-pumped, are compared. Parameters of some erbium laser glasses are presented, including the new LGS-E7, which requires a smaller pumping energy density (less than 100–200 J cm-2). Test data from experimental models are summarized.

338 citations

Journal ArticleDOI
TL;DR: In this paper, a brief review is given regarding ultrafast laser micromachining of materials and some general experimental observations are first provided to show the characteristics of ultrafast LMMM.
Abstract: A brief review is given regarding ultrafast laser micromachining of materials. Some general experimental observations are first provided to show the characteristics of ultrafast laser micromachining. Apart from empirical research, mathematical models also appear to allow for a further and systematic understanding of these phenomena. A few fundamental ultrafast laser micromachining mechanisms are addressed in an attempt to highlight the physics behind the experimental observations and the mathematical models. It is supposed that a vivid view of ultrafast laser micromachining has been presented by linking experimental observations, mathematical models and the behind physics.

322 citations

Journal ArticleDOI
TL;DR: In this article, the authors performed an experimental investigation and a successive statistical optimization of the parameters of the selective laser melting process of the 18Ni300 maraging steel and found that the best part properties were produced with the laser power bigger than 90 W and the velocity smaller than 220 mm/s.
Abstract: Selective Laser Melting (SLM) is an Additive Manufacturing process (AM) that built parts from powder using a layer-by-layer deposition technique. The control of the parameters that influence the melting and the amount of energy density involved in the process is paramount in order to get valuable parts. The objective of this paper is to perform an experimental investigation and a successive statistical optimization of the parameters of the selective laser melting process of the 18Ni300 maraging steel. The experimental investigation involved the study of the microstructure, the mechanical and surface properties of the laser maraging powder. The outcomes of experimental study demonstrated that the hardness, the mechanical strength and the surface roughness correlated positively to the part density. Parts with relative density higher than 99% had a very low porosity that presented closed and regular shaped pores. The statistical optimization determined that the best part properties were produced with the laser power bigger than 90 W and the velocity smaller than 220 mm/s.

317 citations

Performance
Metrics
No. of papers from the Journal in previous years
YearPapers
2023640
2022953
2021821
2020635
2019729
2018587