Laser Polishing of Additive Manufactured AlSi10Mg Parts with an Oscillating Laser Beam

Schanz, Jochen; Hofele, Markus; Hitzler, Leonhard; Merkel, Markus; Riegel, Harald

doi:10.1007/978-981-10-1082-8_16

Cited by 42 publications

(15 citation statements)

References 31 publications

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“…In recent studies, the combination of AM fabrication with postlaser-polishing was suggested and its general feasibility was proven. [283][284][285]…”

Section: Influencing Mechanisms Affected Properties Referencesmentioning

confidence: 99%

A Review of Metal Fabricated with Laser‐ and Powder‐Bed Based Additive Manufacturing Techniques: Process, Nomenclature, Materials, Achievable Properties, and its Utilization in the Medical Sector

et al. 2018

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Additive manufacturing has multiple advantages over conventional fabrication techniques, such as the geometrical freedom and, to a great extent, the omission of tooling equipment. Hence, futuristic designs and non-standard topology-optimized structures can be fabricated without causing noteworthy extra cost, since the geometrical complexity is, exaggeratedly spoken, for free. The manufacturing time and the amount of required raw material are the key criteria, which determine the expenses. What at first glance appears as an engineer's dream, introduces its complexity in the description of the material's characteristics and their volatility to the manufacturing conditions. Within this study, the main properties (i.e., surface hardness, tensile, and compression strength, as well as fracture toughness) and their anisotropic and inhomogeneous nature are addressed. Detailed overviews of the progress to date for aluminum, iron, titanium, cobalt, and nickel based raw materials are provided. Furthermore, an overview about the state-of-the-art in the medical sector is included, comprising the areas of utilization and several trail studies.

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“…In recent studies, the combination of AM fabrication with postlaser-polishing was suggested and its general feasibility was proven. [283][284][285]…”

Section: Influencing Mechanisms Affected Properties Referencesmentioning

confidence: 99%

A Review of Metal Fabricated with Laser‐ and Powder‐Bed Based Additive Manufacturing Techniques: Process, Nomenclature, Materials, Achievable Properties, and its Utilization in the Medical Sector

et al. 2018

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“…For applications where the geometrical freedom is of higher importance as the removal of the porosity, e.g. in applications where the occurring stresses are uncritical, the surface quality can be enhanced with laser polishing [15,16]. In order to gain insight into the variance related to the build direction, the samples were produced in three representative configurations (Table 1), defined by the angle of the specimen's longitudinal axis to the substrate plate (xy-plane).…”

Section: Manufacturing Conditionsmentioning

confidence: 99%

The Influence of Post-Heat-Treatments on the Tensile Strength and Surface Hardness of Selective Laser Melted AlSi10Mg

Hitzler

Charles

Öchsner

2017

DDF

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Recent investigations revealed major fluctuations in the material properties of selective laser melted AlSi10Mg, which corresponded with the varying precipitation-hardening state of the microstructure, caused by the differing dwell times at elevated temperatures. It was indicated that a subsequent heat treatment balances the age-hardening and results in a homogenized material strength. In order to further investigate this statement selective laser melted AlSi10Mg samples were subject to multiple post-heat-treatments. Subsequently, the surface hardness and tensile strength was determined and compared with the as-built results. The post-heat-treatment led to an arbitrary occurrence of rupture, indicating a successful homogenization, coupled with a remarkable improvement in ductility, but to the costs of a lowered tensile strength, which was highly dependent on the chosen heat-treatment procedure.

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“…Nevertheless, both approaches are limited in terms of their accessibility, restricting the modification of most inherent surfaces. To overcome this issue the laser polishing of selective laser melted components was studied, enabling the modification of all surfaces with promising results for further applications [16,17].…”

Section: Introductionmentioning

confidence: 99%

Position dependent surface quality in selective laser melting

Hitzler

Hirsch

Merkel

et al. 2017

Materialwissenschaft Werkst

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Additive manufacturing receives nowadays opulent attention in both media and ongoing research. In particular, the techniques involving full melting of the raw material, enabling the fabrication of directly deployable components, are of high interest. To date, there are still secondary influences which are yet to be considered, leading to substantial, mainly directional dependent, deviations. The study at hand investigated the surface roughness dependencies in plane, focusing on the interaction of the unidirectional inert gas stream with the irradiation sequence; more precisely the weld splashes emerging from the melt pool, and the resulting in plane pattern. The surface roughness of the upwards orientated faces revealed clear fluctuations, being lowest close to the gas‐inlet and also in the back area of the machine. Perpendicular to the fabrication plane aligned surfaces did not reveal any volatility regarding the inert gas stream. Increasing the energy density of the irradiation led to an increase in the surface roughness of all side faces, but to an improved roughness of the upwards facing surfaces coupled with a significant reduction in evident weld splashes.

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Laser Polishing of Additive Manufactured AlSi10Mg Parts with an Oscillating Laser Beam

Cited by 42 publications

References 31 publications

A Review of Metal Fabricated with Laser‐ and Powder‐Bed Based Additive Manufacturing Techniques: Process, Nomenclature, Materials, Achievable Properties, and its Utilization in the Medical Sector

A Review of Metal Fabricated with Laser‐ and Powder‐Bed Based Additive Manufacturing Techniques: Process, Nomenclature, Materials, Achievable Properties, and its Utilization in the Medical Sector

The Influence of Post-Heat-Treatments on the Tensile Strength and Surface Hardness of Selective Laser Melted AlSi10Mg

Position dependent surface quality in selective laser melting

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