Study of Mechanical Characteristics of Stainless Steel Samples Obtained by Direct Laser Deposition

The paper presents the results of mechanical tensile tests and microhardness of samples obtained from stainless steel 316L powder by direct laser deposition. The strength characteristics of the deposited samples are better than those of rolled ones obtained in the traditional way. The material stren...

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Bibliographic Details
Published inPhysics of atomic nuclei Vol. 82; no. 11; pp. 1441 - 1444
Main Authors Ishkinyaev, E. D., Petrovskiy, V. N., Polskiy, V. I., Dzhumaev, P. S., Sergeev, K. L., Shcekin, A. S., Panov, D. V., Ushakov, D. V.
Format Journal Article
LanguageEnglish
Published Moscow Pleiades Publishing 01.12.2019
Springer
Springer Nature B.V
Subjects
Austenitic stainless steels
Building materials
Bulk density
Hardness
Inclusions
Laser deposition
Lasers
Mechanical properties
Microhardness
Parameter modification
Particle and Nuclear Physics
Physics
Physics and Astronomy
Powders
Process parameters
Promising Construction Materials
Radiation
Stainless steel
Steel, Stainless
Substrates
Tensile tests
direct laser deposition
additive technologies
mechanical properties of deposited materials
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Summary:The paper presents the results of mechanical tensile tests and microhardness of samples obtained from stainless steel 316L powder by direct laser deposition. The strength characteristics of the deposited samples are better than those of rolled ones obtained in the traditional way. The material strength is reduced and its plasticity is increased with the growth of the laser radiation power during deposition. The obtained regularities are explained by analysis of the microstructure. It is found that the hardness of the cladding is substantially higher than that of the substrate material with the corresponding composition. This is a consequence of hardening of each layer during deposition of the next layer and formation of nanosized spherical inclusions representing oxides of metals that make up the powder in the sample bulk. The density of these particles affects the overall hardness of the material and depends on the radiation power supplied. Individual properties of the material for various applications can be modified by appropriate selection of technological parameters of the printing process.
ISSN:1063-7788
1562-692X
DOI:10.1134/S1063778819110048