The classification of flaws of metal materials synthesized by the selective laser melting method and the capabilities of nondestructive testing methods for their detection

Алешин, Н. П.; Murashov, V. V.; Evgenov, A.G.; Grigoriev, Maxim V.; Shchipakov, N. A.; Vasilenko, S. A.; Krasnov, I. S.

doi:10.1134/s1061830916010022

Cited by 24 publications

(2 citation statements)

References 4 publications

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“…This list can be supplemented with defects in metallic materials synthesized using additive technologies, for example, selective laser melting. These include defects such as material discontinuity (cracks, pore aggregations) caused by crystallization stresses and shrinkage processes in the process of manufacturing parts [15].…”

Section: Methodsmentioning

confidence: 99%

Increasing the laser-acoustic method efficiency for testing metal products by using 3D visualization

2019

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Section: Methodsmentioning

confidence: 99%

Increasing the laser-acoustic method efficiency for testing metal products by using 3D visualization

2019

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“…The second reason is the high surface roughness and the presence of defects such as micropores and microcracks on the surface of the SLM titanium products, which require complex finishing treatments associated with various machines and technologies and with excessive losses of time, labour and energy [13,14]. Many researchers are working on solving these problems, but so far there is still no method effective enough to reduce roughness and clean the surface defects.…”

Section: Introductionmentioning

confidence: 99%

Improving the Surface Quality and Tribological Characteristics of 3D-Printed Titanium Parts through Reactive Electro-Spark Deposition

Kostadinov,

Penyashki,

Nikolov

et al. 2024

Materials

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This work presents the results of research conducted with an aim to improve the surface quality, hardness and wear resistance of titanium alloy Ti6Al4V, obtained via the laser powder bed fusion of metals (PBF-LB/M) process of additive manufacturing (AM) known as the 3D printing of metals. The 3D surfaces were coated via reactive electrospark deposition (RESD) with low-pulse energy and electrode materials of low-melting metals and multi-component hard alloys. The relationship between the electrical parameters of the RESD process and the quality, composition, structure, microhardness and wear resistance of the treated surfaces were investigated and analysed. It was found that the roughness and thickness of the resulting surface layers could be changed by changing the RESD modes within the limits of 2.5–5 µm and 8–20 µm, respectively. RESD processing allowed us to achieve two to five times lower roughness than that of titanium AM surfaces. The microhardness and wear resistance of the RESD surfaces are two to four times higher than those of the titanium substrate. Possibilities for the purposeful synthesis of new wear-resistant phases and compounds and for obtaining surface layers with predetermined thickness and roughness were established. It was shown that the subsequent reaction’s electrospark processing helped to simultaneously reduce the roughness and increase the hardness and wear resistance of the modified surfaces, and can be successfully used instead of the material-energy-labour and machine-intensive finishing treatments of the titanium surfaces obtained after 3D printing.

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In-line Measurement Technology and Quality Control

Lanza

Haefner

Schild

et al. 2019

Precision Manufacturing

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The classification of flaws of metal materials synthesized by the selective laser melting method and the capabilities of nondestructive testing methods for their detection

Cited by 24 publications

References 4 publications

Increasing the laser-acoustic method efficiency for testing metal products by using 3D visualization

Increasing the laser-acoustic method efficiency for testing metal products by using 3D visualization

Improving the Surface Quality and Tribological Characteristics of 3D-Printed Titanium Parts through Reactive Electro-Spark Deposition

In-line Measurement Technology and Quality Control

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