Influence of Layer Thickness on Internal Structure of Parts Manufactured from 316-L Steel Using SLM Technology

Buican, George Răzvan; Oancea, Gheorghe; Lancea, Camil; Pop, Mihai Alin

doi:10.4028/www.scientific.net/amm.809-810.369

Cited by 9 publications

(5 citation statements)

References 8 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Furthermore, several studies have been examined the influence of the metal powder layer thickness on the internal structure and the micro-hardness of the SLM steel parts. Buican [20] investigated the effect of building stainless steel parts, with different layer sizes and compared the micro hardness of three-dimensional metallic parts, obtained by using a laser beam that melts fine powder on a layer-by-layer basis [21].…”

Section: Methodsmentioning

confidence: 99%

Compressive Behaviour of Lattice Structures Manufactured by Polyjet Technologies

et al. 2020

Self Cite

View full text Add to dashboard Cite

Additive manufacturing (AM) techniques can help to reduce the time and cost for manufacturing complex shaped parts. The main goal of this research was to determine the best strength structure of six different types of lattice cells, manufactured using the Poly Jet AM technology. In order to perform the tests, six samples with the same structure were created for each lattice type. For testing the samples in compression, an electromechanical test machine was used. finite element analysis (FEA) analysis was used in order to determine the area where the greatest stresses occured and to estimate the maximal compressive strength. The strongest structure was determined by obtaining the maximal compressive strength. This was calculated in two ways: as a ratio between the maximal supported force and the mass of the sample (N/g) and as a ratio between the maximal supported force and the critical section of the sample (MPa).

show abstract

Section: Methodsmentioning

confidence: 99%

Compressive Behaviour of Lattice Structures Manufactured by Polyjet Technologies

et al. 2020

Self Cite

View full text Add to dashboard Cite

show abstract

“…It can be inferred that the vertical tensile strength of thin-walled parts manufactured by pulse micro-arc plasma additive manufacturing should be reach 600MPa. Roll forming [23] 604 266 51…”

Section: Hardness Distribution In the Thin-walled Structurementioning

confidence: 99%

Mechanical Properties of 316 Stainless Steel Structure produced by Pulsed Micro-plasma Additive Manufacturing

Yuan

Guan

Wang

et al. 2021

Preprint

View full text Add to dashboard Cite

An innovative pulsed micro-plasma additive manufacturing (AM) system is proposed for the fabrication of thin-walled 316 stainless steel parts. During the deposition process, the heat accumulation from the micro-plasma can be controlled effectively by adjusting the following parameters: the AM current, pulse length of the plasma arc, and scanning speed. The width of the pool can reach 3.0 mm. The microstructural analysis, micro-hardness tests, and tensile strength tests were performed. The results of the structural characterisation showed that columnar dendrites predominated in the microstructure of thin-walled elements and exhibited epitaxial growth from the bottom to the top and from the middle to both sides, while the top grains had more variations in growth orientation. The grains had a core-shell structure with a growth orientation along the < 100 > direction of the austenite structure, and the boundary was composed of migrated C and Cr. The micro-hardness of the thin-walled structure (240–320 Hv0.3) decreased with increasing the deposition thickness. The tensile strength and yield strength of the thin-walled parts were 669 and 475 MPa, respectively. The fracture mechanism was that cracks formed along the pores along the pores of the grain boundary and then propagated along them, ultimately leading to the fracture.

show abstract

“…Most frequently applied one of seven class of additive manufacturing is family of powder bed fusion (PBF) technologies [1]. Direct metal selective laser melting (DMSLM, or here referred as SLM) today widely applied for manufacturing metallic parts [2,3]. This technology creates parts from a special metal powder layer by layer using laser beam for melting it within inert gas atmosphere.…”

Section: Introductionmentioning

confidence: 99%

Surface Hardness Modification of Selective Laser Melted Ti6Al4V Parts by Sliding Friction Diamond Burnishing

Dezső

Szigeti

Varga

2023

Period. Polytech. Mech. Eng.

View full text Add to dashboard Cite

Selective laser melting (SLM) is a frequently used additive manufacturing technology for creating metallic, especially Ti6Al4V parts. After the production by SLM usually postprocessing is necessary for several reasons. Here the sliding friction diamond burnishing is applied as postprocessing procedure.In this paper an experimental study of surface hardness improvement of selective laser melted Ti6Al4V ELI cylindrical parts is demonstrated. The surface is modified by sliding friction diamond burnishing as postprocessing machining. The design of experiment method was applied to investigate effect of five factors (two SLM and three machining parameters) on surface hardness modification.It is shown that both SLM and postprocessing factors makes significant effect to the surface hardness improvement, most important ones are laser power, laser scan speed during manufacturing, and the burnishing force as factor of postprocessing. Empirical formulas are fit to measurement data, and visualized by surface plots. Relationship between factors and the surface hardness improvement is strongly nonlinear. In the investigated parameter window burnishing force has always positive effect to surface hardness improvement.Electron microscopic investigations show that change in surface hardness can be related to four main morphological changes: compression of the surface by plastic deformation of protrusions, attenuation of valleys, formation of inner cavities and creation of small protrusions by diamond tool. This paper is an extended paper of a conference paper published in the proceedings book of the XXXI. International Welding Conference (Kecskemét, Hungary).

show abstract

Influence of Layer Thickness on Internal Structure of Parts Manufactured from 316-L Steel Using SLM Technology

Cited by 9 publications

References 8 publications

Compressive Behaviour of Lattice Structures Manufactured by Polyjet Technologies

Compressive Behaviour of Lattice Structures Manufactured by Polyjet Technologies

Mechanical Properties of 316 Stainless Steel Structure produced by Pulsed Micro-plasma Additive Manufacturing

Surface Hardness Modification of Selective Laser Melted Ti6Al4V Parts by Sliding Friction Diamond Burnishing

Contact Info

Product

Resources

About