Strategy of manufacturing components with designed internal structure by selective laser melting of metallic powder

Yadroitsev, Igor; Thivillon, L.; Bertrand, Ph.; Smurov, I.

doi:10.1016/j.apsusc.2007.08.046

Cited by 313 publications

(141 citation statements)

References 7 publications

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“…The high energy input also leads to large thermal gradients that give rise to internal stresses and microstructures with columnar grains which resulted in anisotropic properties. The mechanical properties of the as SLM printed IN625 samples have high strength but are low in ductility [3].Post heat treatment of the SLM printed parts could provide a workable solution to modify the microstructures and tailor the properties further to suit the application. This paper investigated on the mechanical properties and microstructures of as SLM printed IN625 samples before and heat treatment the mechanical properties and microstructures were also compared with the cast and wrought IN625 samples.…”

Section: Introductionmentioning

confidence: 99%

Mechanical Properties and Microstructures of As Printed and Heat Treated Samples of Selective Laser Melted IN625 Alloy Powder

Raghavan

Sun

Zhang

et al. 2015

MATEC Web of Conferences

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Abstract:The current study focusses in evaluating the mechanical properties (yield strength, ultimate tensile strength and elongation %) and microstructures of as printed and heat treated tensile samples produced by Selective Laser Melting (SLM) which is an Additive Manufacturing (AM) technique. The as printed IN625 alloy exhibited good mechanical properties as compared to cast and wrought alloy, owing to fast cooling rates that give very fine dendritic/cellular structures during the SLM process. Standard solutionizing and precipitation hardening treatment was given to the SLM as printed samples. The as printed sample's ductility increased from 30% elongation to 47% elongation with small drop in tensile strength from 878MPa to 836MPa. The increase of ductility after heat treatment was evident in the change of fracture morphology from long straight striations with dimple shape ductile like features in the as printed sample to mainly dimple shaped ductile-like fracture surface in the heat treated sample as observed in the FESEM.

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Section: Introductionmentioning

confidence: 99%

Mechanical Properties and Microstructures of As Printed and Heat Treated Samples of Selective Laser Melted IN625 Alloy Powder

Raghavan

Sun

Zhang

et al. 2015

MATEC Web of Conferences

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“…The means includes the optical system for laser beam modulation and the system of optical monitoring. So the power density gradient may be corrected with the purpose to create the optimal thermal-and mass-transfer conditions at the molten pool surface, liquidating and reducing the powder material granule jetting effect [8][9][10].…”

Section: Introductionmentioning

confidence: 99%

Laser beam profiling: experimental study of its influence on single-track formation by selective laser melting

Zhirnov

Podrabinnik

Okunkova

et al. 2015

Mechanics & Industry

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-In the article the experimental study of influences of laser beam profiling on the microstructure of the material obtained by selective laser melting is presented. Microstructure was researched by the example of single-track formation. For these needs the optical and video-monitoring stand was constructed. The defects of single-track formation were obtained by microscopy and video monitoring. The technological gaps for each laser beam profile give the possibility to use higher power for laser systems in the future with the purpose to improve productivity of SLM processing.

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“…Selective Laser Melting (SLM) is an additive manufacturing method that uses a laser in an inert atmosphere to selectively melt layers of loose metal powder into a solid, building a part layer by layer from the bottom up [2,3]. Selective laser melting and electron beam melting typically utilize the entire melting mechanism that completely dissolved all particles of metal powder and generates a compact and stable solid body [4,5].…”

Section: Introductionmentioning

confidence: 99%

Surface Quality Research for Selective Laser Melting of Ti-6Al-4V Alloy

Król¹,

Tański²

2016

Archives of Metallurgy and Materials

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One of the innovative technology of producing the components is Selective Laser Melting (SLM) belongs to additive manufacturing techniques. SLM technology has already been successfully applied in the automotive, aerospace and medical industries. Despite progress in material flexibility and mechanical performances, relatively poor surface finish still presents a significant weakness in the SLM process. The scope of the present article is the study the influence of selective laser melting parameters such as laser power, scanning speed, exposure time and hatch spacing through additive manufacturing as well as the orientation of the model corresponding to the laser beam on the surface characteristic of the components made from Ti-6Al-4V alloy. By using optimized process parameters, a low surface roughness can be obtained. In research, the machine for the selective laser melting of metal powders Renishaw AM 125 device was used. Based on experiment plan, 32 models were produced, which were examined to define the surface roughness and thus represent an influence of process parameters and the orientation on the model surface quality. The article discusses the fundamental factors determining the roughness that gives invaluable knowledge to improve the surface quality of SLM parts.

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Strategy of manufacturing components with designed internal structure by selective laser melting of metallic powder

Cited by 313 publications

References 7 publications

Mechanical Properties and Microstructures of As Printed and Heat Treated Samples of Selective Laser Melted IN625 Alloy Powder

Mechanical Properties and Microstructures of As Printed and Heat Treated Samples of Selective Laser Melted IN625 Alloy Powder

Laser beam profiling: experimental study of its influence on single-track formation by selective laser melting

Surface Quality Research for Selective Laser Melting of Ti-6Al-4V Alloy

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